Search

Copyright of Journal of Applied Veterinary Science & Technology is the property of Universitas Airlangga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Meat contamination occurs in a variety of ways, the most significant of which include live animals prior to slaughter (infected animals), workers and tools used in the slaughter process, and post-slaughter activities to prepare the carcasses (removing the skin and viscera). Raw meat remains the primary source of many diseases caused by microbes that are transmitted to humans, especially those that cause food poisoning, such as Escherichia coli and Salmonella spp., which are considered among the most important health problems facing the world. Therefore, we decided to study the efficiency of using some organic acids (lactic acid and beefxide) to reduce the number of pathogenic Escherichia coli, Salmonella spp., on the surfaces of beef carcasses in the slaughterhouse of Mosul city. Eighty samples (beef carcass sponge swabs) were collected over the course of three months between September 13, 2023, and December 11, 2023, using culture method and polymerase chain reaction. Our findings of pathogenic bacteria including Shiga toxin-producing E. coli, showed the presence of 4 isolates out of 40 carcass samples (4/40: 10%); all were isolated from the sample’s prior treatment with organic acids, 3 of which possessed the stx1 gene and one isolate had the stx2 gene. The study also revealed that there were only two isolates of Salmonella spp. (2/40: 5%) in beef carcasses that possessed the invA gene and these are samples that have not been treated with organic acids. This study concludes the effectiveness of lactic acid and beefxide solutions in removing pathogenic bacteria such as Shiga toxin-producing E. coli and Salmonella spp. from beef carcasses.

The prevalence and antibiotic resistance of Salmonella spp. and Staphylococcus spp. from greywater were investigated in Africa’s Sahel region, Burkina Faso. A total of 36 and 56 isolates of Salmonella spp. and Staphylococcus spp. were isolated from greywater, respectively. From the Salmonella spp. isolates, resistance was most frequently observed against vancomycin (69%), ampicillin (61%), cefoxitin (42%), trimethoprine/sulfamethoxazole (36%), amoxicillin-clavunal acid (33%) and tetracycline (33%). For all Staphylococcus spp. isolates, the highest rate of resistance was against penicillin (55.36%) followed by oxacillin (48.21%) and clindamycin (30.36%). In addition, 75% of the isolated Salmonella spp. strains were resistant to at least two antibiotics of different families, while 30.35% of Staphylococcus spp. strains were multidrug-resistant (MDR). Overall, this is one of the first studies reporting the presence of MDR bacteria in untreated greywater discharged from domestic activities in Burkina Faso. Our results show that untreated greywater can contain bacteria resistant to antibiotics used in therapeutic care. Therefore, uncontrolled discharge of untreated greywater into the environment could lead to the dissemination of resistant bacteria and resistance genes in the environment and increase the risk of human exposure to antimicrobial resistance. [ABSTRACT FROM AUTHOR]

Background: Knowledge of antimicrobial resistance patterns of bacteria in food and pet birds in our environment is a prerequisite to effective control of bacterial diseases in humans and other food animals. Particularly, there is a dearth of information on the prevalence of resistant bacteria in pet and zoo birds in Cameroon. This study was carried out to determine the antibiotic resistance profiles of Escherichia coli and Salmonella spp isolates in apparently healthy poultry and zoo birds in Cameroon and to phenotypically and genotypically identify extendedspectrum β-lactamases (ESBLs) isolates in the poultry and aviary birds. Methodology: This was a cross-sectional study of 320 randomly selected birds, which included 172 poultry and 148 zoo birds over a period of nine months, from which a total of 320 different non-repetitive samples were collected. The specimens were processed by standard microbiological culture methods at the National Veterinary Laboratory (LANAVET), Yaoundé annex, Cameroon. All isolated bacteria from cultures were identified as E. coli and Salmonella spp by conventional biochemical test scheme and confirmed with API®20E gallery. Antibiotic susceptibility test (AST) of confirmed isolates was done using the Kirby–Bauer disc diffusion technique, with AST results interpreted according to CLSI guidelines. Isolates with phenotypic characteristics of extended-spectrum beta-lactamase were subjected to molecular identification for blaCTX-M, blaTEM and blaSHV genes. Data obtained were analyzed using descriptive statistics. Results: Out of the 320 samples, a total of 88 E. coli and 17 Salmonella species were isolated from both broilers and zoo birds with an overall isolation prevalence of 27.5% and 5.3% respectively. High resistance of E. coli was observed among isolates from broiler, especially to trimethoprim-sulfamethoxazole (96.7%), ampicillin and ticarcillin (88.3%), norfloxacin (81.7%), piperacillin (78.3%) and ceftriaxone (63.3%). However, the resistance pattern among isolates from aviary birds was low with the highest resistance observed for imipenem (39.28%). The isolates had multiple antibiotic resistance (MAR) indices between 0.18-0.94 with an average of 0.3. A striking MAR index of 0.94 was observed in an ESBL isolate. Detection of β-lactamase genes in 16 phenotypic ESBLproducing E. coli and Salmonella isolates showed the presence of 75.0%, 6.3% and 12.5% for blaCTX-M, blaTEM, and blaSHV genes respectively. Conclusion: ESBL isolates were widespread among apparently healthy broilers in live-bird markets in Cameroon with ESBL-producing E. coli and Salmonella species showing high resistance to penicillin, quinolones and sulphonamides. In addition, there is evidence of antibiotic-resistant bacteria in wild birds which can be transmitted to humans through fecal droppings or by being in close contact with them. [ABSTRACT FROM AUTHOR]

Kefir is a fermented dairy product based on the fermentation of milk by bacteria and yeasts. It is produced by adding kefir grains, consisting of a consortium of microorganisms, to milk in order to start a natural fermentation (Garofalo et al., 2020). Kefir is well recognized for its potential health value as a source of probiotics, however, there have been concerns about the potential growth of pathogenic microorganisms in kefir and the potential health hazards associated (Leite et al., 2013) A mathematical model was developed to describe the evolution of microbes present during kefir fermentation and the potential growth of Salmonella spp. as one example of a potential food safety hazard. For this, equations previously described in the scientific literature were combined and adapted to the milk kefir matrix. To assess the safety of the product, the growth of Salmonella was predicted considering its interaction with the medium and the other species. The drop in pH; generation of yeasts metabolites such as ethanol; and buffer capacity was described and considered when modelling Salmonellas' kinetics. Interaction between the pathogenic species and the background microflora was included in the model. Parameters of some well-described systems were taken from literature. Alongside, some other parameters describing specific assets from the system were estimated using experimental data of microbial population kinetics during kefir fermentation. The growth of yeasts, lactic acid bacteria, Salmonella together with the pH were experimentally collected at critical processing times and fitted to the mathematical model by minimizing the residual sum of squares (RSS). Confidence intervals of 95 % were calculated. For further validation, the output of the model was contrasted with an independent data set. It was concluded that Salmonella is able to increase its population during the first hours of the kefir fermentation process. Inactivation can be apportioned to the drop of pH as a consequence of the LAB metabolism, once the pH reaches values below 4. After this no growth of Salmonella seems to be found in milk kefir as confirmed by the model. No residual population of the pathogen is observed. This suggests that by controlling the growth and metabolism of the background microflora, safety can be assured in milk kefir. This process was successfully described by a novel mathematical model and the estimation of its'parameters. [ABSTRACT FROM AUTHOR]

This study aimed to analyze the microbial contamination of chicken meat and its pH value from traditional markets in Banyuwangi, East Java to ensure public health. A total of 30 raw chicken meat samples from three traditional markets were used in this study and examined for the presence of Escherichia coli and Salmonella spp. E. coli and Salmonella spp. were identified using Gram staining, culturing, and biochemical tests. The Most Probable Number (MPN) method was used for coliform and E. coli. Measuring the pH value of chicken meat was carried out after purchasing the meat and 24 hours after storage at cold temperatures. The results showed coliform contamination in all samples with an average of >1100 CFU/G with E. coli contamination of 20% (6/30), exceeding the maximum recommended limit. Furthermore, the identification of Salmonella spp. in all samples showed negative results. Chicken meat pH value decreased with the length of postmortem time; immediately after purchase (0 hours), the pH value was 5.78 ± 0.26, and after 24 hours of storage, it raised 6.02 ± 0.28. In conclusion, there was high coliform contamination out of 30 raw chicken meat samples taken from some traditional markets in Banyuwangi. Furthermore, E. coli contamination was as much as 20%, and Salmonella spp. was negative. [ABSTRACT FROM AUTHOR]

ABSTRACT Salmonella spp. is one of the major bacterial causes of foodborne gastroenteritis in humans. The aim of this study was to investigate antimicrobial susceptibility to cephalosporins and quinolones, and to identify the genetic mechanisms related to this resistance in strains of Salmonella spp. Seventy chicken carcass samples were collected from slaughterhouses in the state of Rio de Janeiro, Brazil. The phenotypic profile was detected by the disk-diffusion method and the search for genes encoding betalactamases, and resistance to quinolones was evaluated by PCR. The search for mutations in gyrA and parC was carried out by sequencing these genes. Eleven strains of Salmonella spp. of different serotypes were isolated. All the strains were resistant to at least one of the antimicrobials tested, and 63.64% (7/11) showed resistance to three or more antimicrobials. In the phenotypic test for ESBL production, 36.36% (4/11) of the strains were considered positive. PCR detected the resistance genes bla CMY-2, qnrB, bla CTX-M, and bla TEM. Among the isolates, 45.45% (5/11) simultaneously presented the bla CTX-M, bla TEM, qnrB genes and a mutation (Thr-57→Ser) in parC. Point mutations in the parC gene were detected in all the analyzed samples. Genes such as bla SHV, qnrA, qnrC, qnrD, qnrS, aac(6’)-Ib, qepA, and oqxAB were not detected. The study identified Salmonella spp. resistant to cephalosporins and quinolones, with resistance genes and mutations in parC, highlighting concerns about the adoption of biosecurity measures, responsible use of antimicrobials, and surveillance of resistant strains in the poultry chain.

Plant essential oils have antimicrobial properties that are widely used in food preservation and aromatherapy and also have various medicinal uses. The way essential oil will affect the microorganisms widely depends on the type of microorganism and the type of oil used. Gram-positive bacteria are more sensitive to essential oil antimicrobial traits than gram-negative bacteria. Ragweed (Ambrosia artemisiifolia L.) essential oil has a wide range of antimicrobial applications; this oil is recommended for potential health benefits because of its antioxidant activity. The aim of this study was to examine the antibacterial potential of the ragweed essential oils against Escherichia coli, Bacillus subtilis and Salmonella spp. The antimicrobial effect of the oil was examined using a diffusion method test. Before the experiment, the inhibition zone of bacterial growth was determined using the antibiotic gentamicin. The results of the study confirmed the antimicrobial effect of ragweed oil on the growth of Salmonella spp. and Bacillus subtilis growth, while this oil had negligible effect on Escherichia coli growth. Moderate susceptibility of Salmonella spp. and Bacillus subtilis and resistance of E. coli was observed after ragweed treatment compared to the standard inhibition zone values proposed by EUCAST. This research confirms the potential application of ragweed essential oil in the inhibition of Salmonella spp. and Bacillus subtilis growth.

Microbial food safety in cultured tilapia remains a challenge to public health worldwide, due in part to intensive aquaculture leading to poor water quality and high organic matter deposition. This study aimed to determine the prevalence of indicator and potential pathogenic bacteria in hybrid red tilapia (Oreochromis spp.) and their cultivation water and to identify environmental parameters and other bacterial contaminants associated with Salmonella contamination. A total of 120 fish were sampled, which were partitioned into fish carcasses (n=120), muscle (n=120), intestine (n=120), liver and kidney (n=120), and cultivation water (n=120) from three commercial farms in western Thailand from October 2019 to November 2020. The prevalence of fecal coliforms and Escherichia coli (E. coli) in these 600 samples was 74.8% and 56.7%, respectively. The prevalence of Salmonella, Vibrio cholerae (V. cholerae), Aeromonas hydrophila, and Vibrio vulnificus (V. vulnificus) was 23.0%, 17.5%, 2.5%, and 1.7%, respectively. None of the samples tested positive for Streptococcus agalactiae. Cultivation water exhibited a high prevalence for Salmonella (58.3%). Among fish samples, Salmonella had the highest prevalence at 14.1%, which was mainly from fish intestine. There was a significant association of Salmonella with the presence of fecal coliforms, E. coli, V. cholerae, and V. vulnificus. The predominant serovars of Salmonella included Saintpaul, Neukoelln, Escanaba, and Papuana. Grazing ducks that were raised in proximity to these cultured tilapia shared the same isolates of Salmonella based on the similarity of their rep-PCR DNA fingerprints, suggesting that ducks may function as either a biological reservoir for tilapia or at minimum participate in the environmental replication of this strain of Salmonella. Taken together, the results suggest that the environment used for tilapia aquaculture may be contaminated with pathogenic bacteria; therefore, food safety precautions are needed during processing, transportation, cooking, and consumption.

Background: The current study was carried out with the aim to reveal the presence of Escherichia coli (E. coli) and Salmonella species (spp.) in table eggs sold for human use in Peshawar, and their antimicrobial resistance to different drugs used in Pakistan for poultry and human practices. Methods: A total of 80 eggs were bought from different shops. E. coli and Salmonella spp < /em>. were isolated from 85.36% (70) and 14.63% (12) of the total collected egg samples (80), respectively. The antibiotics susceptibility test was done using the disk diffusion method. Results: The shells of eggs showed significantly higher contaminations as compared to egg internal contents for both E. coli and Salmonella spp < /em>. The isolated organism presented a significant resistance to multiple drugs. They were found to be completely resistant to penicillin G, nitrofurantoin, oxacillin, and sulfamethoxazole/trimethoprim. Furthermore, Salmonella spp. was also completely resistant to tetracycline. The susceptibility pattern of both these isolates was quite different for some antimicrobials, as Salmonella isolates were completely sensitive to neomycin, whereas 100% susceptibility was observed in E. coli isolates to amikacin, amoxicillin-clavulanic acid, levofloxacin, and neomycin. In addition, resistance frequency among isolates of ­E. coli against amoxicillin (77.14%), minocycline (54/28%), streptomycin (80%), and tetracycline (80%), and in Salmonella spp. against amikacin (50%), amoxicillin (66.66%), amoxicillin-clavulanic (66.66%), levofloxacin (33.33%), minocycline (50%) and streptomycin (83.33) were also high. Conclusion: Hence it can be concluded from the present study that the table eggs sold in the markets of Peshawar Pakistan are infected with multidrug resistance (MDR) strains of E. coli and Salmonella spp < /em>.

Salmonella is an important agent that causes foodborne gastrointestinal infections. Salmonella enterica serovar Enteritidis, serovar Typhimurium, and serovar Infantis are the main pathogenic agents of several enteric infections worldwide. Due to the emergence of multidrug resistant Salmonella strains, there is a need for new administration strategies alternative to antibiotics, such as bacteriophages, for effective control of them. The main objectives of this study were to isolate and characterize Salmonella spp. bacteriophage and compare its activity to commercial phage product and assess the effect of bacteriophages in vitro during 24-h. Because of the study, it was found that the newly isolated and named vB_SiM_12 phage could lyse 100% of the strains tested. Bacterial growth with dilutions of vB_SiM_12 phage (MOI ranging from 0.001 to 10) was measured during 24-h. The optic density values of the samples with added bacteriophage remained lower than the control sample during the 24-h incubation period. The results show that using phages may offer a promising alternative to combat biological control agents against Salmonella infection. [ABSTRACT FROM AUTHOR]

This paper presents the results of two proficiency testing (PT) rounds conducted by the Export Inspection Agency (EIA) Chennai laboratory in 2021 for food testing laboratories in India. The PT program was designed in accordance with ISO/TS 22117, a standard for proficiency testing in food microbiology, and targeted Listeria monocytogenes and Salmonella spp as the organisms of focus. The samples were found to be stable and recoverable during the analysis, and all PT sample packages were delivered to participant laboratories in good condition. The participant laboratories reported high sensitivity rates of 100% for PT round 061021 M and 96.49% for PT round 050721 M. The accuracy rate in PT round 061021 M was 91.89% and 92.10% in case of PT round 050721 M. However, there were some false positive and false negative results reported by some participant laboratories in both PT rounds, which may have been caused by operational errors or inconsistencies in analysis. During the PT round 061021 M, out of a total of 38 participant laboratories, five laboratories reported false positive results and one laboratory reported a false negative result. Similarly, during the PT round 050721 M, six laboratories reported false positive results which resulted in their results being deemed unsatisfactory. [ABSTRACT FROM AUTHOR]

Copyright of Glasnik Zastite Bilja is the property of Zadruzna Stampa D.D. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Purpose The effect of different initial carbon to nitrogen (C/N) ratios on the prevalence of Salmonella spp., fecal coliforms and helminth eggs over composts produced from several mixtures of maize straw (S) and dairy manure (M) was investigated. Method Four C/N ratios (21, 22, 27, and 38) were evaluated, including one with manure only (C/N 21). The composting process was performed under field conditions in northern Mexico. Results The process lasted 51 days; Salmonella spp. was reduced 1â2 log (>â94%) in most treatments, except for the C/N ratio of 27 which achievedââ99%) in all treatments while helminth eggs achievedâ

INTRODUCCIÓN: las gastroenteritis agudas (GEA) constituyen un grave y ocupante problema de Salud Pública. OBJETIVO: resultó de interés buscar bacterias (Salmonella spp. y Shigella spp.) virus (Rotavirus y Adenovirus) y parásitos en heces de niños con diarrea en un Hospital de la provincia de Córdoba, Argentina; para trazar un perfil etiológico en nuestra región. MATERIALES Y MÉTODO: se analizaron 137 muestras de heces de pacientes infanto-juveniles ambulatorios durante un año. RESULTADOS: 31 de las 137 muestras analizadas arrojaron resultados positivos (22,62%; n=137). De los casos positivos (n=31), 61,29% (19; n=31) correspondieron a aislamientos de los géneros Salmonella y Shigella, 9,67% (3; n=31) a diagnóstico de Rotavirus y 22,58% (7; n=31) a diagnóstico de parásitos intestinales. Dos de las muestras clínicas positivas presentaron coinfección (6,45 %); giardiosis y shigelosis y giardiosis y Rotavirus, respectivamente 25,80% de las bacterias estudiadas se presentaron en niños de 3 y 4 años de edad; 9,67% de las parasitosis, en niños de 6 y 7 años de edad y 6,45% Rotavirus, en niños de 1 y 2 años de edad. No hubo diferencias significativas en la distribución por sexo. DISCUSIÓN Y CONCLUSIONES: la vigilancia de las diarreas basada en los diagnósticos microbiológico y parasitológico provee información relevante que complementa el seguimiento clínico y epidemiológico creando un mapeo de la circulación de los agentes etiológicos en una determinada región.

Salmonella have been implicated in foodborne disease outbreaks globally and is a pressing concern in the South African small-scale sector due to inadequate hygiene standards and limited regulatory oversight, leading to a higher risk of foodborne diseases. By investigating irrigation water and leafy green vegetables produced by small-scale growers and sold through unregulated supply chains, this study was able to determine the presence, serotype distribution, virulence gene profiles, antibiotic resistance, and genetic diversity of Salmonella isolated from these sources. From 426 samples, 21 Salmonella-positive samples were identified, providing 53 Salmonella isolates. Of these, six different Salmonella serotypes and sequence types (STs) were identified, including Salmonella II 42:r: ST1208 (33.96%; n = 18), Salmonella Enteritidis: ST11 (22.64%; n = 12), Salmonella II 42:z29: ST4395 (16.98%; n = 9), Salmonella Havana: ST1524 (15.09%; n = 8), Salmonella Typhimurium: ST19 (9.43%; n = 5), and Salmonella IIIb 47:i:z: ST7890 (1.89%; n = 1). A total of 92.45% of the isolates were found to be multidrug-resistant, showing high rates of resistance to aztreonam (88.68%; n = 47), ceftazidime (86.79%; n = 46), nalidixic acid (77.36%; n = 41), cefotaxime (75.47%; n = 40), cefepime (71.70%; n = 38), and streptomycin (69.81%; n = 37). All isolates possessed the aac(6')-Iaa antimicrobial resistance gene, with a range of between 9 and 256 virulence genes. Eleven cluster patterns were observed from Enterobacterial Repetitive Intergenic Consensus sequence analyses, demonstrating high diversity among the Salmonella spp., with water and fresh produce isolates clustering, suggesting water as a potential contamination source. Plasmid replicon types were identified in 41.51% (n = 22) of the isolates, including Col(pHAD28) in Salmonella Havana (5.66%; n = 3), Col156 in Salmonella II 42:z29:- (1.89%; n = 1) and both IncFIB(S) and IncFII(S) in Salmonella Enteritidis (22.64; n = 12), Salmonella Typhimurium (9.43%; n = 5), and Salmonella Havana (1.89%; n = 1). This study highlights the presence of multidrug-resistant and multivirulent Salmonella spp. in the small-scale leafy green vegetable supply chains, underscoring the need for the development of a “fit-for-purpose” food safety management system within this system.

The green synthesis of nanoparticles, utilizing aqueous plant extract as a capping and stabilizing agent, has attracted significant attention in various domains, particularly in pharmaceuticals and drug delivery. In this investigation, silver nitrate (AgNO3) salts were employed as precursors to fabricate silver nanoparticles using Calotropis procera (leaves/flower) extract, and the resulting nanoparticles were characterized. Fourier Transform Infrared (FTIR) spectroscopy revealed three primary functional groups at peaks of 2851.4 cm-1, 1543.1 cm-1, and 1323.2 cm-1, responsible for capping and stabilizing the synthesized C.p-AgNPs. Scanning Electron Microscopy (SEM) demonstrated that the synthesized C.p-AgNPs exhibited spherical shapes with an average particle size ranging from 20 nm to 30 nm. Energy-dispersive X-ray (EDX) analysis of the synthesized C.p-AgNPs indicated the presence of pure silver (Ag) at 54.32% in the region of 2.7 to 3.1 keV. Furthermore, the antimicrobial activity of C.p-AgNPs was examined, with the best inhibition observed at 0.5 mg/mL on Gram-negative bacteria S. aureus (12.0 mm) and Streptococcus spp (13.0 mm), and on Gram-positive bacteria E. coli (16.0 mm) and Salmonella spp (14.0 mm). The antimicrobial efficacy was dose-dependent, suggesting the potential for eradicating resistant human pathogenic bacteria. The antibacterial potential of C.p-AgNPs could be enhanced by increasing their concentration, depending on the specific application. Based on the study's findings, C.p-AgNPs derived from Calotropis procera can be employed for various biomedical purposes, such as textile coating by incorporating C.p-AgNPs in fibers and food storage by nanocapsulation of food items to extend their shelf life. [ABSTRACT FROM AUTHOR]

The growing prevalence of foodborne zoonotic infections increases the risk of emergence of microorganisms with acquired resistance to antimicrobial drugs. Such microorganisms are capable of horizontal transmission of R-plasmids of antibiotic resistance to other types of bacteria. The results of our monitoring in 2021, in accordance with the State Strategy of Ukraine to curb the development of antimicrobial resistance and reduce the risks of the formation and spread of antimicrobial-resistant strains of microorganisms, showed high resistance of enterobacteria, enterococci and Campylobacter isolated from pigs to antibiotics of various groups. Among the isolated cultures of Esherichia coli, the ability of some strains to produce extended-spectrum β-lactamases (ESBL) was found. Testing of the experimental isolates for antibiotic resistance and screening for possible production of acquired resistance enzymes was carried out by the disc diffusion method with antibiotic disks of different groups. Out of 542 samples of appendix from pigs from farms in different regions of Ukraine, 138 isolates were isolated and identified. Among them: Esherichia coli – 68 strains; Enterococcus faecalis – 57; Enterococcus faecium – 9; Salmonella spp. – 2 and Campylobacter spp. – 2. Antibiotic resistance testing showed that 10 (7.3% of the isolates) of different bacterial species remained susceptibile to all antibiotics used. The remaining 128 test isolates (93.5% of the isolates) showed antibiotic resistance. The largest number of antibiotic-resistant commensal and zoonotic bacteria was detected in pig farms of Donetsk, Kyiv, Dnipro, Kirovohrad and Chernihiv regions. Escherichia coli and Enterococcus spp. were most often isolated from pigs; in smaller quantities Salmonella spp. and Campylobacter spp. All strains of Salmonella spp. faecium showed resistance to 1 to 3 antibiotics of different groups. Among the antibiotic-resistant E. faecalis, 1 strain with resistance to vancomycin was detected. Polyantibiotic resistance was inherent in E. colistrains. Among the polyantibiotic-resistant E. colistrains, 4 strains were found and confirmed to have acquired resistance due to the production of ESBL. [ABSTRACT FROM AUTHOR]

Clinical signs in 4 cases of salmonellosis in cats included vomiting, diarrhea (2 cases each), fever, dystocia, icterus, and seizures (1 case each). Three cats died, and one was euthanized. Grossly, all cats were in poor body condition and had yellow-to-dark-red perianal feces (3 cases), oral and ocular pallor (2 cases) or icterus (1 case), fluid or pasty yellow intestinal contents (4 cases), white or dark-red-to-black depressed areas on the hepatic surface (2 cases), yellow abdominal fluid with swollen abdominal lymph nodes (1 case), and fibrin strands on the placental chorionic surface (1 case). Histologically, all cats had necrotizing enterocolitis and random hepatocellular necrosis. Other histologic findings included mesenteric (4 cases) or splenic (2 cases) lymphoid necrosis, and endometrial and chorioallantoic necrosis (1 case). Gram-negative bacilli were observed within neutrophils and macrophages in the intestinal lamina propria (4 cases), liver, spleen, lymph node, endometrium, and placenta (1 case each). Aerobic bacterial culture on frozen samples of small intestine, mesenteric lymph node, lung, and liver yielded Salmonella enterica subsp. enterica. Serotyping was consistent with S. Enteritidis (cases 1, 3) and S. Typhimurium (cases 2, 4). [ABSTRACT FROM AUTHOR]

Background and Aim: The bovine industry is threatened by one of the most serious and deadly enteric diseases, calf diarrhea, particularly in developing nations like Bangladesh. In this context, bacterial resistance to antimicrobial drugs and its detrimental consequences have become a critical public health issue that is difficult to address globally. This study aimed to isolate and identify Escherichia coli and Salmonella spp. with their antibiogram and antibiotic resistance gene detection from sulfonamide-treated diarrheic calves. Materials and Methods: Twelve diarrheic calves suffering from calf diarrhea in a dairy farm were selected and a total of 36 fecal samples were aseptically collected directly from rectum before, during, and at the end of treatment for each calf to determine the total viable count, total E. coli count and total Salmonella count. A polymerase chain reaction was used for the specific detection of E. coli and Salmonella genus targeting fliC and invA genes, respectively. Antibiotic sensitivity test of the isolated E. coli and Salmonella spp. were performed by the disk diffusion method for eight commonly used antibiotics. Results: A total of 36 E. coli (100%) and 12 Salmonella spp. (33%) were isolated from the samples and were confirmed by polymerase chain reaction. Total viable count was found to be ranged from 35 × 107 to 99 × 1010 colony-forming unit (CFU)/g fecal sample before starting sulfonamide treatment, 34 × 105 to 25 × 1010 CFU/g during treatment with sulfonamide, and 48 × 103 to 69 × 1010 CFU/g immediately after completion of sulfonamide treatment. Total E. coli count was found to be ranged from 4 × 104 to 36 × 1010 CFU/g, 24 × 104 to 23 × 108 CFU/g, and 13 × 104 to 85 × 1010 CFU/g, whereas total Salmonella count was found to be ranged from 16 × 106 to 18.5 × 1011 CFU/g, 15 × 104 to 44 × 107 CFU/g, and 13.2 × 105 to 21 × 1010 CFU/g fecal sample before starting sulfonamide treatment, during treatment with sulfonamide immediately after completion of sulfonamide treatment, respectively. The in vitro antibiotic sensitivity test showed that all the E. coli and Salmonella spp. isolated from diarrheic calves (100%) contained multidrug-resistant (MDR) phenotypes. Escherichia coli isolates were found 100% resistant to amoxicillin (AMX), cefuroxime, cephalexin (CN), erythromycin (ERY), and tetracycline (TET); whereas 94.4%, 86.1%, and 77.8% isolates were resistant to doxycycline (DOX), moxifloxacin (MOF), and gentamycin (GEN), respectively. In case of Salmonella isolates, all were found 100% resistant to AMX, CN, and ERY; whereas 91.7% of resistance was observed for DOX, MOF, cefuroxime, GEN, and TET. Based on the molecular screening of the antibiotic resistance genes, tetA gene was present in 83.3% of the isolated E. coli and 75% of the isolated Salmonella strains, whereas 83.3% E. coli and 79.2% Salmonella isolates contained blaTEM gene. Conclusion: These findings suggest that MDR E. coli and Salmonella spp. might be responsible for calf scouring, which is challenging to treat with antibiotics or sulfonamide drugs alone. Therefore, it is important to check the antibiotic sensitivity pattern to select a suitable antibiotic for the treatment of calf scoring. A suitable antibiotic or combination of an antibiotic and sulfonamide could be effective against E. coli and Salmonella spp. responsible for calf scouring.

Copyright of Journal of Agriculture, Food, Environment & Animal Sciences is the property of Nigde Omer Halisdemir University, Faculty of Agricultural Sciences & Technologies and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sheep meat including mutton and lamb and its edible offal are regarded as important sources of high quality animal protein, essential amino acids, vitamins and minerals. However, unsanitary handling of such meat sources during the slaughtering, dressing, evisceration, or further processing might contribute to contamination of meat with a vast array of microorganisms including those with public health significance such as E. coli, and Salmonella spp. In this review, we would like to highlight the role of sheep meat and offal as potential sources of the spread of E. coli, and Salmonella spp. It was clear that adoption of strict hygienic measure during the entire steps of the carcass preparation and processing as well as efficient cooking of such meat and edible offal are among the suggested strAtegies to prevent the possible contamination of sheep meat with foodborne pathogens. [ABSTRACT FROM AUTHOR]

ABSTRACT: The present study investigated Salmonella spp. in the feces of 200 foals up to one year of age (100 with clinical signs of diarrhea and 100 without clinical signs of diarrhea). Bacteriological culture, serotyping, antimicrobial susceptibility, and real-time PCR (qPCR SYBR® Green or a TaqMan®) for detecting the invA gene (with and without a selective pre-enrichment step in tetrathionate broth) were performed. Bacterial culture revealed 15% (n=30) of positive animals (21 animals with diarrhea and nine without diarrhea). Among the 30 isolates, 13 different serovars were identified: S. Infantis, S. Minnesota, S. I.4,5,12:i:-; S. Anatum, S. Cerro, S. Oranienburg, S. Braenderup, S. Give, S. Newport, S. IIIb 61:c:z35, S. 109:-:1.5, S. I.4.12:d:-, S. I.6.8:-:-. Multidrug resistance was found in 43.33% (n=13) of the isolates, with one isolate obtained from animals without diarrhea and 12 isolates from animals with diarrhea. All qPCR techniques used in the study classified more samples as positive for Salmonella spp. than the bacterial culture of feces. In addition, all qPCR techniques detected more positive animals in the diarrhea group than in the diarrhea-free group. The results confirm the utility of the qPCR method without the pre-enrichment step in tetrathionate as a rapid test for Salmonella spp. in carrier animals. In animals with clinical signs of diarrhea, it can be combined with bacterial culture (antimicrobial susceptibility testing and serotyping). The isolation of Salmonella spp. in nine animals without diarrhea confirms the importance of asymptomatic carrier animals in the epidemiology of the disease. The multidrug resistance observed highlights the importance of rational antimicrobial use in horses and adopting biosecurity protocols that are efficacious in controlling the spread of infections between animals and zoonotic transmission in farms.

Objective: This study aimed to develop loop-mediated isothermal amplification (LAMP) combined with lateral flow dipstick (LFD) and compare it with LAMP-AGE, polymerase chain reaction (PCR), and standard Salmonella culture as reference methods for detecting Salmonella contamination in animal products and animal production environmental samples. Methods: The SalInvA01 primer, derived from the InvA gene and designed as a new probe for LFD detection, was used in developing this study. Adjusting for optimal conditions by temperature, time, and reagent concentration includes evaluating the specificity and limit of detection. The sampling of 120 animal product samples and 350 animal production environmental samples was determined by LAMP-LFD, comparing LAMP-AGE, PCR, and the culture method. Results: Salmonella was amplified using optimal conditions for the LAMP reaction and a DNA probe for LFD at 63°C for 60 minutes. The specificity test revealed no cross-reactivity with other microorganisms. The limit of detection of LAMP-LFD in pure culture was 3×10² CFU/mL (6 CFU/reaction) and 9.01 pg/µL in genomic DNA. The limit of detection of the LAMP-LFD using artificially inoculated in minced chicken samples with 5 hours of pre-enrichment was 3.4×104 CFU/mL (680 CFU/reaction). For 120 animal product samples, Salmonella was detected by the culture method, LAMP-LFD, LAMP-AGE, and PCR in 10/120 (8.3%). In three hundred fifty animal production environmental samples, Salmonella was detected in 91/350 (26%) by the culture method, equivalent to the detection rates of LAMP-LFD and LAMP-AGE, while PCR achieved 86/350 (24.6%). When comparing sensitivity, specificity, positive predictive value, and accuracy, LAMP-LFD showed the best results at 100%, 95.7%, 86.3%, and 96.6%, respectively. For Kappa index of LAMP-LFD, indicated nearly perfect agreement with culture method. Conclusion: The LAMP-LFD Salmonella detection, which used InvA gene, was highly specific, sensitive, and convenient for identifying Salmonella. Furthermore, this method could be used for Salmonella monitoring and primary screening in animal products and animal production environmental samples. [ABSTRACT FROM AUTHOR]

The aim: study the bacterial risks and to determine the control critical points at the industrial production of chicken edible egg. Materials and methods. The first stage of our research was to study the degree of risk of contamination by opportunistic and pathogenic microflora at all stages of production of chicken edible eggs according to ISO 22000:2007. In order to achieve the goal, bacteriological research was conducted on pathological material from day-old chickens and adult birds, the content of marketable eggs from birds of different age groups; as well as washed from the equipment of poultry farms, the repair young poultry department, the industrial herd department, egg sorting and certification workshops, from the surface of the egg, from the working surfaces of special vehicles. Bacterial contamination of air, droppings, bedding, complete feed was studied. Bacteriological studies were carried out according to generally accepted schemes, using accumulative, selective and differential diagnostic media (heptadecyl sulfate agar, endo, xylose-lysine agar, differentiated agar with diamond green, Muller-Hinton). The sampling was carried out using universal sterile applicators "Voles". The next stage was to analyze the results of bacteriological studies and determine the basic list of criteria for creating critical control points (CCPs) for the further development of a risk management scheme for the bacterial biosafety of edible eggs according to HACCP principles. Results. Isolation of S. aureus from the heart and lungs, E. coli, P. aeruginosa, Enterobacter spp, Enterococcus spp - from the intestines of day-old chickens and litter - indicate violations of veterinary and sanitary standards in the hatchery and the low quality of disinfection before the placement of day-old young birds, as well as non- observance of veterinary and sanitary norms for the transportation regime of day-old young birds. Isolation of E. coli, Enterobacter spp, Klebsiella spp.Str. zymogenes from compound feed, and E. coli, Enterobacter spp, Shigella spp. in washings from the equipment of the feed mill is evidence of insufficient veterinary and sanitary control of incoming raw materials, compound feed, as well as poorly carried out disinfection of equipment and specialized vehicles.When examining objects from the production line, E. coli, Enterobacter spp., P. aeruginosa, and S. epiderrmidis were most often isolated. From the pathological material during the bacteriological examination, microflora of the genus E. coli, Streptococcus spp., S. aureus (most often pathogenic serotypes) pre-vailed. As a result of the analysis of the conducted studies, we determined a basic list of criteria for creating a CCP and developing a risk management scheme for the bacterial biosafety of edible eggs according to the principles of HACCP. Conclusions. As a result of the bacteriological monitoring of objects of the technological cycle of chicken edible egg production, we established a list of bacteriological risks at all stages of production. As a result of the conducted research, it was determined, that the spectrum of bacterial contamination was mainly represented by opportunistic microflora. In the majority, the following types of microorganisms were detected: E. coli, P. aeruginosa, Enterobacter spp, Enterococcus spp. But C. jejuni, Streptococcus spp., S. aureus. Salmonella spp, which are the most dangerous for the consumer and poultry, were not isolated. We studied the bacterial risks at all the main stages of the industrial production of chicken edible eggs and identified the main critical control points of production according to the principles of the HACCP system [ABSTRACT FROM AUTHOR]

Salmonella spp. are known as the most important salmonellae's appearance pathogens around the world. The aim of this research was to investigate the presence of Salmonella spp. in poultry for eggs production. The study was conducted in poultry and private farms in the region of Suhareka, Prizren and Dragash, Kosovo. 300 samples of feces, eggs (whitened, vitelus and eggshell), and organs (liver, spleen, intestines and cloaca) were examined with standard method for detection of Salmonella spp. We found that 27 of samples or 9% were confirmed to be Salmonella spp. total number of samples. The largest percentage of the total isolated strains was found in Prizeren region with 44.44%, 29.62%% in Suhareka, and 25.92% in Dragash. Regarding the type of sample and the total number of isolated strains in this study, the largest number of isolates was found in feces samples - 16 strains or 59.25%, while from the eggs were isolated 8 strains (29.62%), and from the organs 3 strains or 11.11%. Increasing the percentage of Salmonella spp. presence in poultry and their products is often associated with the outbreak of Salmonella epidemics in animals and humans, and poultry and poultry farms are the main reservoir of infections. Poultry farming in region of Suhareka, Prizeren, Dragash and wider in Kosovo is developing quickly, especially in the production of eggs and poultry meat. Although the similar results are also found in other researches that have been done in other countries of the world, constant control of salmonella spp. will give indices about their geographical distribution, and the epidemiological, economic and health consequences. [ABSTRACT FROM AUTHOR]

Background and Aim: Foodborne illnesses are a serious challenge to human health and the economic sector. For example, salmonellosis remains a burden in developed and developing nations. Rapid and reliable molecular methods to identify Salmonella strains are essential for minimizing human infection. This study aimed to identify Salmonella spp. in raw milk and dairy products using conventional and molecular techniques and to test the antibiotic susceptibility of the isolated strains. Materials and Methods: One hundred and thirty-one milk and dairy product samples were randomly collected from different localities in Libya. Samples were examined for the presence of Salmonella by conventional culture techniques, including cultivation in Rappaport-Vassiliadis broth and streaking on xylose lysine deoxycholate agar. Identification also used polymerase chain reaction and partial sequencing of 16S rDNA. Twenty-four antibiotics were used for the examination of antimicrobial resistance of Salmonella spp. isolates with the agar disk diffusion method (Kirby–Bauer technique). Multi-antibiotic resistance index and antibiotic resistance index (ARI)for Salmonella enterica isolates were calculated. Results: Twenty-one of 131 samples (16%) were positive for Salmonella spp. recovered from 9 (16%), 2 (11%), 4 (22.2%), and 6 (46%) samples of raw cow milk, fermented raw milk, and fresh locally made soft cheeses, Maasora and Ricotta), respectively. Samples of ice cream, milk powder, and infant formula showed no Salmonella spp. contamination. Only 9 of 21 (42.8%) isolates were confirmed as S. enterica by partial sequence 16S rDNA analysis. All isolates were resistant to amoxycillin, bacitracin, penicillin G, lincomycin, vancomycin, clindamycin, and cloxacillin with an ARI of 0.042. In contrast, all tested strains were sensitive to levofloxacin, doxycycline, and ciprofloxacin. In addition, all of the tested isolates (100%) were resistant to more than one antibiotic. Conclusion: This study demonstrated the applicability of molecular techniques, compared with conventional methods, as preferable for the identification of Salmonella in milk and dairy products and thus reduction of milk-borne transmission to the consumers. From the view of public health, isolation and identification of Salmonella multidrug-resistant strains from raw cow's milk and locally prepared dairy products sold in the Libyan markets indicate the need to improve the handling and processing of milk and dairy products to minimize the prevalence of Salmonella, one of the most important foodborne microorganisms that cause food poisoning.

Background: Contaminated foods of animal origin are the primary reservoirs for human non-typhoidal Salmonellae infections. Transmission of Salmonellae to humans typically occurs by ingesting meat, dairy products, and other foods contaminated by animal faeces from foods contaminated with Salmonellae. Aim: This work aimed at the detection and incidence of viable Salmonella in local food products sold and consumed in Ado – Ekiti. Methods: Typing by pulse-field gel electrophoresis (PFGE), polymerase chain reaction (PCR) detection of antimicrobial drug resistance genes, and antibiotic susceptibility testing were done. Results: Out 105 samples analyzed, Salmonella species was isolated in 77 with highest incidence (100%) observed in kunu, pork meat, egg roll, raw egg and chicken. The antimicrobial drug resistance patterns on the isolates showed that Salmonella species were resistant to cotrimoxazole (100%), chloramphenicol (100%), amoxicillin (100%), ampicillin (86%) and ofloxacin (57%) while decreased susceptibility to ciprofloxacin (100%), streptomycin (100%), gentamycin (86%) and pefloxacin (71%) was found. multidrug resistance was observed in about 77% of the isolates. With PFGE, a total of eighty- three (83) patterns were observed and thirty-six 36(43%) isolates had the 3 most common patterns. All isolates from kunu and pork meat contained qnrB2, 6 (86%) isolates from egg roll contained blaCMY-2’; 9 (75%) isolates from liquid egg and chicken each contained blaCMY-23’. The total isolate of 73% is an indication of high incidence of Salmonella spp. in food products obtained in Ado-Ekiti. Conclusion: This study showed antimicrobial drug resistance in low resource settings and urgent need for surveillance and control of this phenomenon is recommended.

The aim of this experiment was comparing of antibiotic resistance profile between Salmonella spp. and Escherichia coli isolated from rectal swabs of chicken from conventional breeding. For the antibiotic susceptibility testing disk diffusion method was used. The both tested bacteria were exposed against thirteen antibiotics: ampicillin, piperacillin, cefotaxime, ceftriaxone, doripenem, meropenem, levofloxacin, ofloxacin, amikacin, gentamycin, tygecycline, tetracycline and chloramphenicol. For the identification of these strains, we used Chromogenic coliform agar, Triple sugar iron agar and biochemical test (ENTEROtest 24). We identified Salmonella spp. by used MicroSEQ® Salmonella spp. Detection Kit for identification of this strain in Step ONE Real Time PCR. In this study, we determined that Salmonella spp. was more resistant like Escherichia coli. The highest resistance had isolates of Salmonella spp. to levofloxacin (100%) and to ofloxacin (100%). Also to ampicillin was resistance in Salmonella spp. isolates about 83%. Only in case of piperacillin was resistance in Salmonella spp. isolates lower (50%) like in Escherichia coli isolates (66.6%). The both strains were 100 % sensitive to doripenem, meropenem, amikacin, gentamycin and tygecycline. Antibiotic resistance is a biological danger. Bacteria, which we study, are considered to reservoirs of resistant genes and they are facultative and obligate pathogens. If these pathogen bacteria cause diseases those these diseases are difficult to treat.

Aim: The aim of this study was to determine the presence of Salmonella spp. in egg and egg products and to determine antibiotic resistance profiles and minimum inhibitory concentration (MIC) values of isolates. Materials and Methods: A total of 200 samples including 100 eggs (35 village eggs, 35 conventional eggs and 30 organic eggs) and 100 egg products (30 egg powders, 70 pasteurized liquid eggs) were collected from Samsun, Turkey. Eggshell and egg contents samples were processed separately by pooling three eggs together. The isolation and identification of Salmonella spp. was done according to the method proposed by ISO 6579. The antimicrobial susceptibility of Salmonella spp. isolates to various antibiotics and MIC values was performed by VITEK 2 compact system using VITEK 2 AST-GN38 cards. Results: Salmonella spp. were found in two of 100 (2%) eggs (organic egg contents) and one of 100 (1%) egg products (pasteurized liquid egg). A total of 11 isolates were confirmed by PCR techniques as Salmonella spp. with the presence of oriC gene. The highest resistance was against amikacin, enrofloxacin, gentamicin, tobramycin, cephalexin (100%), followed by nitrofurantoin (81.8%), tetracycline (63.6%), ampicillin (54.5%), piperacillin (54.5%), cefpodoxime (54.5%), and imipenem (9.09%). However, there was no resistance to amoxicillin, marbofloxacin and trimethoprim/sulfamethoxazole. The results showed that 11/11 (100%) of Salmonella spp. from three sample showed multi-drug resistance against three or more antibiotic agents. Conclusion: It is recommended to implement good hygiene practices, good production practices and pasteurization techniques to minimize the risk of Salmonellosis due to the consumption of eggs and egg products.

Background: Antibiotic resistance to commonly used antibiotics has made man to resort to the use of their ancestral medicine, by exploiting the numerous potentials in plant parts. Plants were the foremost materials used in folklore medicinal practice and other traditional practices. Studies have indicated important metabolites in plant which have antibacterial potentials. Aim: This descriptive cross-sectional study was conducted during dry season, to determine the phytochemical constituent, antibacterial property and gas chromatography mass spectrometry (GC-MS) analysis of the plant extract. Methods: Extraction of Citrus sinensis (C. sinensis) leaves was performed successively with water and methanol using percolation method. Phytochemical screening to determine the metabolites present in the extract was done. The extracts obtained were tested in vitro for antibacterial activity against clinical isolates of Salmonella typhi (S. typhi) and Salmonella paratyphi (S. paratyphi) using agar well diffusion procedure. Extracts were further analyzed using GC-MS to reveals compounds present in the extracts. Results: Phytochemical screening indicates the presence of metabolites such as alkaloids, tannins, sterols, terpenoids and flavonoids in the extracts. Antimicrobial screening revealed that the extracts exhibited little or no activities against the different isolates with zones diameter of 5mm. Hence, minimum inhibitory concentration (MIC) of the extract and minimum bacteriocidal concentration (MBC) of the extracts were not determined. The GC-MS revealed the identity of compounds when matched with National Institute of Standard and Technology (NIST) library. Conclusion: Important metabolites are present in the extracts, and extracts showed no activity against the test organism at varying extract concentration.

ABSTRACT: Chicken production is an important economic activity in Tanzania. Indigenous chickens are kept in rural areas, while exotic breeds are kept in urban areas. Due to their high productivity, exotic breeds are becoming important sources of protein in fast-growing cities. Dodoma is one of the cities growing very fast in Tanzania. As a result, production of layers and broilers has increased dramatically. However, diseases remain the major challenge to chicken production despite the efforts of livestock officers to educate people on good management practices. This has made farmers think that feeds may be the source of pathogens. The study's objectives were thus to identify the major diseases affecting broiler and layer chickens in the Dodoma urban district, as well as the potential role of feeds in pathogen transmission to chickens. A household survey was conducted to identify common diseases affecting chickens in the study area. Thereafter, locally prepared feed samples were collected from twenty shops available in the district to determine the presence of Salmonella and Eimeria parasites. The presence of Eimeria parasites in the feeds was determined by raising day-old chicks in a sterile environment for 3 wk while feeding them the feed samples collected. Fecal samples from the chicks were analyzed for the presence of Eimeria parasites. Salmonella contamination of the feed samples was determined in the laboratory through the culture method. The study found that coccidiosis, Newcastle disease, fowl typhoid, infectious bursal disease, and colibacillosis are the main diseases affecting chickens in the district. After 3 wk of rearing, 3 out of 15 chicks developed coccidiosis. In addition, about 31.1% of the feed samples showed the presence of Salmonella spp. The prevalence of Salmonella was highest in limestone (53.3%), followed by fishmeal (26.7%), and maize bran (13.3%). It has been concluded that feeds are potential carriers of pathogens. To reduce economic losses and the continuous use of drugs in chicken production, health authorities should assess the microbial quality of poultry feeds.

With this study were determined the risk profile of Salmonella ssp. and sanitary quality of a meat packing company in the capital. For this, hygienic-sanitary inspections were made as described in the CNICA Sanitary Inspection Guide. Knowledge level of handlers was evaluated by means of a survey. To predict the growth of Salmonella spp. in the plant scenery, the Pathogen Modeling Program (PMP) was applied. Risk characterization was estimated with the Ross-Sumner program. Although the hygienic conditions of the facility reached a score of 82 points and the results of the survey were satisfactory, with 85. 9% of correct answers, insufficiencies and abuses were detected in the management of temperatures during the process that could cause the microbial growth. Through the model used, it was possible to predict that when the hamburger dough, with 2.1% NaCl and pH 6.4, is kept at 25 °C, the number of cells reaches the infective dose in 4.1 h, which represents a danger. Finally, through the Ross-Sumner program, a risk for consumers of 67% was estimated, which reflects the probability of occurrence of a foodborne disease outbreak due to consumption of hamburgers, in the event of contamination by Salmonella from raw materials, handlers or cross-contamination during the process. [ABSTRACT FROM AUTHOR]

Background and Aim: The bovine industry is threatened by one of the most serious and deadly enteric diseases, calf diarrhea, particularly in developing nations like Bangladesh. In this context, bacterial resistance to antimicrobial drugs and its detrimental consequences have become a critical public health issue that is difficult to address globally. This study aimed to isolate and identify Escherichia coli and Salmonella spp. with their antibiogram and antibiotic resistance gene detection from sulfonamide-treated diarrheic calves. Materials and Methods: Twelve diarrheic calves suffering from calf diarrhea in a dairy farm were selected and a total of 36 fecal samples were aseptically collected directly from rectum before, during, and at the end of treatment for each calf to determine the total viable count, total E. coli count and total Salmonella count. A polymerase chain reaction was used for the specific detection of E. coli and Salmonella genus targeting fliC and invA genes, respectively. Antibiotic sensitivity test of the isolated E. coli and Salmonella spp. were performed by the disk diffusion method for eight commonly used antibiotics. Results: A total of 36 E. coli (100%) and 12 Salmonella spp. (33%) were isolated from the samples and were confirmed by polymerase chain reaction. Total viable count was found to be ranged from 35 x 107 to 99 x 1010 colony-forming unit (CFU)/g fecal sample before starting sulfonamide treatment, 34 x 105 to 25 x 1010 CFU/g during treatment with sulfonamide, and 48 x 10³ to 69 x 1010 CFU/g immediately after completion of sulfonamide treatment. Total E. coli count was found to be ranged from 4 x 104 to 36 x 1010 CFU/g, 24 x 104 to 23 x 108 CFU/g, and 13 x 104 to 85 x 1010 CFU/g, whereas total Salmonella count was found to be ranged from 16 x 106 to 18.5 x 1011 CFU/g, 15 x 104 to 44 x 107 CFU/g, and 13.2 x 105 to 21 x 1010 CFU/g fecal sample before starting sulfonamide treatment, during treatment with sulfonamide immediately after completion of sulfonamide treatment, respectively. The in vitro antibiotic sensitivity test showed that all the E. coli and Salmonella spp. isolated from diarrheic calves (100%) contained multidrug-resistant (MDR) phenotypes. Escherichia coli isolates were found 100% resistant to amoxicillin (AMX), cefuroxime, cephalexin (CN), erythromycin (ERY), and tetracycline (TET); whereas 94.4%, 86.1%, and 77.8% isolates were resistant to doxycycline (DOX), moxifloxacin (MOF), and gentamycin (GEN), respectively. In case of Salmonella isolates, all were found 100% resistant to AMX, CN, and ERY; whereas 91.7% of resistance was observed for DOX, MOF, cefuroxime, GEN, and TET. Based on the molecular screening of the antibiotic resistance genes, tetA gene was present in 83.3% of the isolated E. coli and 75% of the isolated Salmonella strains, whereas 83.3% E. coli and 79.2% Salmonella isolates contained blaTEM gene. Conclusion: These findings suggest that MDR E. coli and Salmonella spp. might be responsible for calf scouring, which is challenging to treat with antibiotics or sulfonamide drugs alone. Therefore, it is important to check the antibiotic sensitivity pattern to select a suitable antibiotic for the treatment of calf scoring. A suitable antibiotic or combination of an antibiotic and sulfonamide could be effective against E. coli and Salmonella spp. responsible for calf scouring. [ABSTRACT FROM AUTHOR]

Fruits play an essential role in the human diet, being the major source of dietary nutrients and preventing many chronic diseases. Nowadays, consuming prepared food is commonly preferred by consumers since they are time saving and more convenient. Within this scope, the fresh-cut market, mainly including fruits and vegetables, has broadened substantially in recent years. Fruits, which have a suitable environment for the growth of microorganisms, are also highly perishable products with a short shelf life because of mechanical operations. Therefore, serving the product as fresh-cut produce increases concern about the safety of these products, which has become another issue that the suppliers must consider. Recently, consumers have become more conscious of food safety since the transmission of pathogens can cause foodborne diseases. Therefore, information on fresh-cut fruits (FCFs) and recent outbreaks caused by these products are reported in this review. Data collected for each outbreak included the implicated food, year, pathogen, location, and number of cases. According to data, five outbreaks caused by FCFs were reported in recent years, resulting in 466 illnesses, 167 hospitalizations and 1 death. Mainly Salmonella spp. was found a common threat for the minimally produced fruits in these outbreaks. Preventive approaches were also included in the review to maintain the safety of FCFs. [ABSTRACT FROM AUTHOR]

Copyright of Jurnal Medik Veterinar is the property of Universitas Airlangga and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The development of cost-effective, portable, and ease-of-use sensing system for on-site genetic diagnostics is highly desirable for pathogen screening and infectious disease diagnosis. This study develops (1) a paper-based biochip which is able to integrate the loop-mediated isothermal amplification (LAMP) protocols for simultaneous detection of Escherichia coli O157:H7, Salmonella spp., and Staphylococcus aureus, and (2) a stand-alone smartphone-based portable device which can control exactly 65 °C for isothermal amplification as well as collect and analyze the thus generated fluorescence signals. The reported sensing system has been successfully demonstrated for foodborne pathogen detection with a limit of detection of 2.8 × 10−5 ng μL−1. Spiked milk samples with concentration as low as 10 CFU mL−1 were successfully determined within 4 h, demonstrating the practicality of the reported sensing system in the fields. The reported sensing system featuring simplicity and reliability is ideally suited for genetic diagnostics in low resource settings. [ABSTRACT FROM AUTHOR]

This cross‐sectional study was conducted to determine the prevalence of Salmonella at different stages of the broiler production chain and layer flocks in addition to their antibiotic resistance profile and molecular patterns. Over a period of 3 years, different sample matrices were collected from Lebanese farms, slaughterhouses and retail markets. Out of 672 Salmonella serotyped, 514 were analysed for antimicrobial resistance and 214 for clonality using Pulsed‐field gel electrophoresis (PFGE). The results highlighted an important prevalence of Salmonella, 30% in farms, 35.8% in slaughterhouses and 22.4% at retail level. A large diversity of serotypes was identified with predominance among Salmonella Infantis (32.9%), Salmonella Enteritidis (28.4%) and Salmonella Kentucky (21.4%). High resistance to nalidixic acid was revealed in all the isolates. The most prominent resistance was exhibited in S. Kentucky and S. Infantis. The latter was resistant to tetracycline (99%), streptomycin (88.2%) and remarkable multi‐drug resistance (MDR) (89.7%). All S. Kentucky isolates were resistant to ciprofloxacin, MDR (62.4%) and 6% were resistant to extended‐spectrum cephalosporin (ESCs). One persistent clone of S. Enteritidis was found common between poultry and humans. Similar genomic profiles were detected between farms, slaughterhouses and retail suggesting the dissemination of identical clones throughout the food chain possibly due to weak barriers preventing such transmission. [ABSTRACT FROM AUTHOR]

Plasma-activated water (PAW) has been shown to have antimicrobial properties, making it a promising tool for surface decontamination. This study evaluated the ability of PAW generated from high voltage atmospheric cold plasma to remove Salmonella from common surfaces (stainless steel (SS), polyvinyl chloride (PVC), concrete, and wood) found in poultry houses. PAW was generated by exposing distilled water to atmospheric cold plasma in 80% humid air at 90 kV and 60 Hz for 30 min. The resulting PAW contained 1120 ppm of nitrate and 1370 ppm of hydrogen peroxide, with a pH of 1.83. PAW was then applied to coupons of SS, PVC, wood, and concrete surfaces inoculated with 7–8 log 10 CFU of cocktail of Salmonella spp. (S. Typhimurium, S. Newport, S. Montevideo, and S. Enteritidis). PAW effectively reduced Salmonella levels on SS and PVC surfaces to below the detection limit within 30 s. On wood surfaces, a longer treatment time of 7.5 min was required to achieve a maximum reduction of 2.63 log 10 CFU, likely due to the porosity of the wood limiting PAW contact with the bacteria. On concrete surfaces, the reduction in Salmonella levels was only 0.98 log 10 CFU. This was likely due to the greater surface roughness and high alkalinity, which neutralized the PAW species. • Developed a cold plasma treatment that can produce a bactericidal solution - plasma activated water (PAW). • Performed a chemical analysis of PAW. • PAW reduced 99.9 % of Salmonella on stainless steel and polyvinyl chloride in 30 s. • PAW reduced 99.5 % of Salmonella bacteria on wood surfaces after 7.5 min. • The maximum Salmonella reduction on concrete surfaces was 90 % after 30 min. [ABSTRACT FROM AUTHOR]

ABSTRACT The objective of this study was to evaluate the effectiveness of a litter conditioning compound (LCC) based on 98% phyllosilicates (kaolinite) and 2% cinnamon essential oil to be applied on the litter of broiler houses. Animal performance, prevalence of footpad lesions, and litter quality (water activity, pH, and moisture) were evaluated, in addition to the effect on the incidence of Salmonella spp., evaluated by testing shoe-drag swabs, fecal samples, and organs. Twenty-one broiler houses with similar structure and rearing conditions were distributed in a completely randomized design with three treatments and seven replications each, as follows: T0: control, without the use of LCC; T100: application of 100 grams of LCC per m² of litter per week; T200: application of 200 grams of LCC per m² of litter per week. There was no significant effect of treatments on performance variables; however litter pH was lower when 200g/m2 was used in comparison with the control treatment, a result not verified for moisture and water activity (p>0.05). Our findings demonstrated significant reduction in the percentage of footpad lesions in birds that received the LCC (T0: 63.37%; T100: 41.38% and T200: 27.24%). A reduction in the number of positive flocks for Salmonella spp. Was also observed (with overall positivity rates of 17.86%, 12.14%, and 5% for treatments T0, T100, and T200, respectively). It is concluded that the product reduces the incidence of Salmonella spp. and also significantly reduces the incidence of footpad lesions, two important factors for the poultry industry.

Salmonella spp. and Campylobacter can be transmitted through raw milk and cause foodborne illness. The aim of this study was to investigate the prevalence of Campylobacter and pathogenic species of Salmonella spp. species in raw cow's milk using molecular method in Mazandaran province. 100 samples of raw milk were randomly collected from traditional milk collection and retail centers in Mazandaran province in 2019. All samples were transferred as soon as possible to the microbiology laboratory of the Faculty of Veterinary Medicine, Amol University of Special Modern Technologies, in sterile containers and in suitable cold chain conditions. DNA was extracted from milk samples using a commercial kit and then the polymerase chain reaction was performed using appropriate primers to identify Campylobacter jejuni, Campylobacter coli and Salmonella . Out of 100 samples, 7 samples (7%) were infected with Campylobacter jejuni, no positive sample of Campylobacter coli was observed and 2 samples (2%) were infected with Salmonella . According to the results of the present study and the presence of the mentioned bacteria in milk, it is necessary to observe the hygienic principles in the dairy industry, processing and use of sufficient heat to eliminate the mentioned bacteria in raw milk and also use fast and accurate methods to identify These bacteria. [ABSTRACT FROM AUTHOR]

Introduction and Objective. Abortion can occur in sheep, among others, in response to bacterial infection. The present article reviews the latest reports on the various economic and health consequences for the herd, other animals and humans. Review methods. Two independent reviewers searched in PubMed and Google scholar (any date to September 2021) for studies concerning bacterial abortion in sheep. Keywords for the search strategy were: bacteria, sheep, and abortion. Papers were reviewed for scientific merit and relevance as well as for current information. Brief description of the state of knowledge. In the reviewed literature, much attention was paid to infections by Brucella spp., Campylobacter spp., Coxiella burnetti, Listeria spp., and Salmonella spp. As the presence of these bacteria varies according to region, any differential diagnosis should consider the most common pathogens in a given area. It also should be noted that most of the described pathogens have zoonotic potential and, as such, it is extremely important to observe safety rules when assisting in delivering births and when dealing with stillbirths. Conclusions. Identification of the etiological agent seems to be a key factor in the management of abortions, especially in flocks where their numbers appear to be increasing; this is needed to manage and control disease in the flock, and to protect humans and other animal species on the farm. Most studies use molecular methods as diagnostic tools, mainly PCR, and use both foetuses and placenta as research material. [ABSTRACT FROM AUTHOR]

This study was conducted to acquire knowledge on the epidemiology and ecology of some zoonotic agents in snails. Chemical and microbiological analysis was carried out on 46 samples of snails belonging to the species of Helix aspersa and Helix (Eobania) vermiculata. The association between heavy metals and wild snails, a native consumer product in the Region of Sardinia, was determined. The molecular characterisation of Listeria monocytogenes virulence genes has shown a genetic profile that deserves more attention for the improvement of surveillance and risk prevention. Specimens of H. vermiculata showed higher concentrations of cadmium (M=0.80±0.56 mg/kg) than H. aspersa (M=0.61±0.17 mg/kg). A further objective was to determine whether the samples showed significant differences from the point of view of secretion characterisation, in terms of protein content, and to identify species-specific correlations and possible relationships with the environment. The presence of Salmonella enterica sub.sp houtenae (6,14: z4, z23) and Salmonella enterica subsp diarizonae (47: k: e, n, z15) (1 sample), Listeria monocytogenes (2 samples) with Molecular characterization of virulence genes together with the measurement of heavy metals in samples of wild snails has shown a health and hygiene profile that would deserve greater attention for the improvement of the surveillance and prevention of microbiological and chemical risk in such products which currently show a tendency towards increase in consumption. [ABSTRACT FROM AUTHOR]

Background and Aim: Foodborne illnesses are a serious challenge to human health and the economic sector. For example, salmonellosis remains a burden in developed and developing nations. Rapid and reliable molecular methods to identify Salmonella strains are essential for minimizing human infection. This study aimed to  identify Salmonella spp. in raw milk and dairy products using conventional and molecular techniques and to test the antibiotic susceptibility of the isolated strains. Materials and Methods: One hundred and thirty-one milk and dairy product samples were randomly collected from different localities in Libya. Samples were examined for the presence of Salmonella by conventional culture techniques, including cultivation in Rappaport-Vassiliadis broth and streaking on xylose lysine deoxycholate agar. Identification also used polymerase chain reaction and partial sequencing of 16S rDNA. Twenty-four antibiotics were used for the examination of antimicrobial resistance of Salmonella spp. isolates with the agar disk diffusion method (Kirby–Bauer technique).  Multiantibiotic resistance index and antibiotic resistance index (ARI)for Salmonella enterica isolates were calculated. Results: Twenty-one of 131 samples (16%) were positive for Salmonella spp. recovered from 9 (16%), 2 (11%), 4 (22.2%), and 6 (46%) samples of raw cow milk, fermented raw milk, and fresh locally made soft cheeses, Maasora and Ricotta), respectively. Samples of ice cream, milk powder, and infant formula showed no Salmonella spp. contamination. Only 9 of 21 (42.8%) isolates were confirmed as S. enterica by partial sequence 16S rDNA analysis. All isolates were resistant to amoxycillin, bacitracin, penicillin G, lincomycin, vancomycin, clindamycin, and cloxacillin with an ARI of 0.042. In contrast, all tested strains were sensitive to levofloxacin, doxycycline, and ciprofloxacin. In addition, all of the tested isolates (100%) were resistant to more than one antibiotic. Conclusion: This study demonstrated the applicability of molecular techniques, compared with conventional methods, as preferable for the identification of Salmonella in milk and dairy products and thus reduction of milk-borne transmission to the consumers. From the view of public health, isolation and identification of Salmonella multidrug-resistant strains from raw cow`s milk and locally prepared dairy products sold in the Libyan markets indicate the need to improve the handling and processing of milk and dairy products to minimize the prevalence of Salmonella, one of the most important foodborne microorganisms that cause food poisoning. [ABSTRACT FROM AUTHOR]

The primary objective of this study was to monitor viability of Shiga toxin–producing Escherichia coli (STEC), Salmonella spp., and Listeria monocytogenes during preparation and storage of fuet. Regarding methodology, coarse-ground pork (ca. 35% fat) was mixed with salt (2.5%), dextrose (0.3%), starter culture (ca. 7.0 log CFU/g), celery powder (0.5%), and ground black pepper (0.3%) and then separately inoculated with a multistrain cocktail (ca. 7.0 log CFU/g) of each pathogen. The batter was stuffed into a ca. 42-mm natural swine casing and fermented at 23 ± 2°C and ca. 95% ± 4% relative humidity to ≤pH 5.3 (≤48 h). Sausages were then dried at 12 ± 2°C and ca. 80% ± 4% relative humidity to a water activity (aw) of 0.89 (within 33 days) or aw 0.86 (within 60 days). A portion of each batch of fuet was subjected to high-pressure processing (HPP; 600 MPa for 3 min) before chubs were vacuum packaged and stored for 30 days at 20 ± 2°C. The results revealed that pathogen numbers remained relatively unchanged after fermentation (≤0.35 log CFU/g reduction), whereas reductions of ca. 0.8 to 3.2 log CFU/g were achieved after drying fuet to aw 0.89 or 0.86. Regardless of whether fuet was or was not pressure treated, additional reductions of ca. 2.2 to ≥5.3 log CFU/g after drying were achieved following 30 days of storage at 20°C. For non–HPP-treated fuet dried to aw 0.89 and stored for 30 days at 20°C, total reductions of ≥5.3 log CFU/g in levels of STEC or Salmonella spp. were achieved, whereas levels of L. monocytogenes were reduced by ca. 3.6 log CFU/g. Total reductions of ≥5.3 log CFU/g in levels of all three pathogens were achieved after drying non–HPP-treated fuet to aw 0.86. For fuet dried to aw 0.89 or 0.86, that were pressure treated and then stored for 30 days at 20°C, total reductions of >6.2 log CFU/g in levels of all three pathogens were achieved. In conclusion, the processing parameters tested herein, with or without application of HPP, validated that reductions of ≥2.0 or ≥5.0 log CFU/g in levels of STEC, Salmonella spp., and L. monocytogenes were achieved during preparation and storage of fuet. [ABSTRACT FROM AUTHOR]

Background and Aim: Antimicrobial resistance (AMR) is a serious challenge to animal and human health worldwide. Therefore, this study aims to determine levels and patterns of AMR of Escherichia coli and Salmonella spp. strains isolated from poultry farms in Côte d'Ivoire. Materials and Methods: A cross-sectional study was conducted in two districts of Côte d'Ivoire with high poultry production: Abidjan and Agnibilékrou. A total of 231 fecal samples were collected in 124 poultry farms in both districts. Enterobacteria were isolated and tested for susceptibility to 14 antimicrobial agents using the disk-diffusion method. Results: A total of 212 E. coli and 36 Salmonella strains were isolated. In Abidjan, 139 collected samples generated 101 E. coli and 23 Salmonella strains, whereas in Agnibilékrou, 92 collected samples generated 111 E. coli and 13 Salmonella strains. Variable resistance levels were recorded for the antibiotics tested. The resistance prevalence of E. coli and Salmonella, respectively, was high: Doxycycline (98%/94%), sulfonamide (84%/86%), trimethoprim-sulfamethoxazole (80%/41%), and streptomycin (71%/52%). Average resistance rates were recorded for flumequine (38%/66%), ampicillin (49%/33%), amoxicillin (25%/44%), colistin (26%/2%), chloramphenicol (21%/2%), and gentamicin (4%/47%). The antibiotics least affected by resistance were cefuroxime (4%/5%), ceftriaxone (2%/0.00%), and nitrofurantoin (1%/0.00%). Conclusion: In this study, it was observed that resistance to important antibiotics is emerging in poultry production in Côte d'Ivoire. Policies promoting the rational use of antibiotics should be implemented to manage antibiotic resistance in animal production.