Search

Objective: To evaluate the serotype distribution and antibiotic resistance in pneumococcal infections in adults and to provide a perspective regarding serotype coverage of both current and future pneumococcal vaccines. Patients and methods: This passive surveillance study was conducted with the Streptococcus pneumoniae strains isolated from the specimens of patients with pneumonia (materials isolated from bronchoalveolar lavage), bacteraemia, meningitis, pleuritis and peritonitis between 2015 and 2018. Serogrouping and serotyping were performed by latex particle agglutination and by conventional Quellung reaction using commercial type-specific antisera, respectively. The strains were analysed for penicillin, cefotaxime, erythromycin and moxifloxacin susceptibilities by E-test. Results: In the whole study group (410 samples from adults aged ≥18 years), the most frequent serotypes were 3 (14.1%), 19 F (12%) and 1 (9.3%). The vaccine coverage for PCV13, PCV15, PCV20 and PPV23 was 63.9%, 66.6%, 74.1% and 75.9%, respectively, in all isolates. Penicillin non-susceptibility in invasive pneumococcal disease (IPD) was 70.8% and 57.1% in the patients aged

The vast majority of the microscopy methods currently available to study biological samples require staining prior to imaging. Nevertheless, the ability to reveal specific cell structures or organelles in a label-free manner remains desirable in different contexts. Polarization microscopy has long been considered as an interesting alternative to fluorescence-based methods in order to gain specificity on the imaged biological samples. In this work, we show how an original polarization imaging technique, implementing micro-wave photonics and referred to as orthogonality-breaking (OB) microscopy, can provide informative polarization images from a single scan of the cell sample in a fast and sensitive way. For OB imaging, the sample is probed with a laser setup simultaneously generating two orthogonal polarizations shifted in frequency by a few tens of MHz. If the imaged samples display some polarimetric properties, the orthogonality between the two polarizations is broken, leading to a beatnote interference signal that can be detected with a fast detector. The comparison of the images of various cell lines at different cell-cycle stages obtained by OB polarization microscopy and fluorescence confocal images shows that an endogenous polarimetric contrast arizes on compacted chromosomes during cell division. This technique paves the way to label-free real-time polarization imaging of mitotic chromosomes with further potential applications in histology and cancer diagnosis.

Organic fertilizers became a better alternative to chemical fertilizers in modern agricultural practices however, contamination of copper (Cu) from organic fertilizer is still a major concern for the globe. Plant growth promoting (PGP) microorganisms showed their efficiency to combat with this problem and thus Cu tolerant PGP endophytes from roots of Odontarrhena obovata (Alyssum obovatum) growing on Cu smelter contaminated serpentine soil were explored in present study. Out of twenty-four isolates, Pseudomonas lurida strain EOO26 identified by 16s rRNA gene sequencing was selected to check its efficacy for Cu-remediation. The strain EOO26 showed multi-metal tolerance, drought resistance and exhibited PGP attributes such as 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, siderophore and ammonia production. Significant production of indole-3-acetic acid and phosphate-solubilization under different Cu concentration (0–100 mg L−1) at varying pH (5.0–8.0) suggests potentiality of this strain to work effectively under wide range of abiotic stress conditions. Plant growth experiment (pH 6.8 ± 0.3) in copper spiked soil suggested a significant increase in length and dry weight of root and shoot of sunflower (Helianthus annuus) after inoculation with strain EOO26. Plants inoculated with strain EOO26 resulted in increase in Cu uptake by 8.6-fold for roots and 1.9-fold for leaves than uninoculated plants. The total plant uptake in inoculated Cu treatment was 2.6-fold higher than uninoculated one, which is much higher than the previously reported Cu accumulating plants. The excellent adaptation abilities and promising metal removal efficiency strongly indicate superiority of strain EOO26 for phytoremediation of Cu-contamination and may work effectively for Cu removal from contaminated soils. © 2020 Elsevier Ltd Science and Engineering Research Board, SERB; Department of Science and Technology, Government of West Bengal, DST: INT/ RUS / RFBR /363; Ministry of Science and Higher Education of the Russian Federation The authors acknowledge the work support by RFBR , Russia (Project No. 19-516-45006) and DST , India (INT/ RUS / RFBR /363) and the Ministry of Science and Higher Education of the Russian Federation (Agreement No. 02.A03.21.0006). L.B.B thankful to the Science and Engineering Research Board (SERB), India for providing National Post-Doctoral Fellowship (Grant No. PDF/2017/001074 ).

In the present research, the 20 lactobacilli isolated from children feces aged 4-15 years old were investigated for their capabilities to survive at pH 2.0, 2.5, 3.0 and in the presence of 0.25, 0.50 and 0.75% bile salts, their effect on the growth of pathogens, in addition to their sensitivity against 13 selected antibiotics. All the lactobacilli strains were able to survive in low pH and bile salt conditions at pH 2.0 and 0.25% bile salt for 2 h. Moreover, all lactobacilli strains exhibited inhibitory activity against Escherichia coli ATCC 11229, Pseudomonas aeruginosa ATCC 27853 and Staphylococcus aureus ATCC 29213. In addition, all lactobacilli strains indicated resistance to teicoplanin, vancomycin, and bacitracin. The amount of exopolysaccharide (EPS) produced by the strains was 70 and 290 mg/L. The capabilities to autoaggregation and coaggregate with E. coli ATCC 11229 of the strains were also evaluated. High EPS-producing strains indicated significant autoaggregation and coaggregation capability with test bacteria (p < 0.01). The maximum cholesterol removal (76.5%) was observed by strain Lactobacillus pentosus T3, producing a high amount of exopolysaccharide, in 0.3%oxgall concentration (p < 0.05). Our results demonstrate that the capability to EPS production, acid-bile tolerance, antimicrobial activity, antibiotic resistance, aggregation and cholesterol removal of lactobacilli could be utilized for preliminary screening in order to identify potentially probiotic bacteria suitable for human. (C) 2013 Elsevier Ltd. All rights reserved.

The objective of this study was to determine the prevalence and molecular typing of methicillin-susceptible Staphylococcus aureus (MSSA) and methicillin-resistant S. aureus (MRSA) in food-producing animals and retail meat in Fargo, North Dakota. A two-step enrichment followed by culture methods were used to isolate S. aureus from 167 nasal swabs from animals, 145 samples of retail raw meat, and 46 samples of deli meat. Positive isolates were subjected to multiplex polymerase chain reaction in order to identify the genes 16S rRNA, mecA, and Panton-Valentine Leukocidin. Pulsed-field gel electrophoresis and multilocus sequence typing were used for molecular typing of S. aureus strains. Antimicrobial susceptibility testing was carried out using the broth microdilution method. The overall prevalence of S. aureus was 37.2% (n = 133), with 34.7% (n = 58) of the animals positive for the organism, and the highest prevalence observed in pigs (50.0%) and sheep (40.6%) (p < 0.05); 47.6% (n = 69) of raw meat samples were positive, with the highest prevalence in chicken (67.6%) and pork (49.3%) (p < 0.05); and 13.0% (n = 6) of deli meat was positive. Five pork samples (7.0%) were positive for MRSA, of which three were ST398 and two were ST5. All exhibited penicillin resistance and four were multidrug resistant (MDR). The Panton-Valentine Leukocidin gene was not detected in any sample by multiplex polymerase chain reaction. The most common clones in sheep were ST398 and ST133, in pigs and pork both ST398 and ST9, and in chicken ST5. Most susceptible S. aureus strains were ST5 isolated from chicken. The MDR isolates were found in pigs, pork, and sheep. The presence of MRSA, MDR, and the subtype ST398 in the meat production chain and the genetic similarity between strains of porcine origin (meat and animals) suggest the possible contamination of meat during slaughtering and its potential transmission to humans. College of Agriculture, Food Systems and Natural Resources College, North Dakota State University College of Veterinary Medicine, Iowa State University

Gökmen, Mukadderat (Balikesir Author), Methicillin-Resistant Staphylococcus aureus is an important pathogen that causes severe infections in humans and animals. The aim of this study was to determine the prevalence and the antimicrobial profile of methicillin-resistant S. aureus (MRSA) in cow bulk tank milk and dairy products in the region of Balikesir in Turkey. Of 175 milk and dairy products' samples, 26 were found to be positive for coagulase-positive staphylococci and 3 (2 samples from cow bulk tank milk and 1 sample from tulum cheese) were MRSA phenotypically being resistant against both oxacillin and cefoxitin. Among these, 17 were confirmed as S. aureus by the detection of nuc gene and one as MRSA carrying the mecA gene. All MRSA isolates were found to be also resistant against ampicillin, penicillin and sulfamethoxazole-trimethoprim. Consequently, even though the prevalence of MRSA in cow bulk tank milk and dairy products was relatively low (1.70%), it may pose serious risks in terms of food safety and public health. In order to prevent the prevalence of MRSA in dairy products, hygienic measures, especially in terms of personal hygiene and disinfection of equipment in all stages of dairy production, should be taken, and HACCP and GMP regulations should be implemented.

JUSTIFICATIVA E OBJETIVOS: Com base nos conhecimentos sobre a ação antiinflamatória e antibacteriana dos anestésicos locais (AL) o estudo teve como objetivo determinar o efeito da lavagem peritoneal com solução de bupivacaína na sobrevida de ratos com peritonite fecal por fezes autógenas. MÉTODO: Foram utilizados 48 ratos da linhagem Wistar, com peso entre 300 g e 330 g (311,45 ± 9,67), submetidos à laparotomia seis horas após a indução de peritonite, distribuídos aleatoriamente em quatro grupos: 1 - Controle, nenhum tratamento (n = 12); 2 - Enxugamento da cavidade abdominal (n = 12); 3 - Lavagem da cavidade abdominal com 3 mL de solução fisiológica a 0,9% e enxugamento (n = 12); 4 - Lavagem da cavidade abdominal com 8 mg.kg-1 (± 0,5 mL) de bupivacaína 0,5%, adicionada a 2,5 mL de solução fisiológica a 0,9% e enxugamento (n = 12). Os animais que faleceram foram necropsiados e o horário do óbito foi anotado. Os animais sobreviventes foram mortos no 11° dia do pós-operatório e realizou-se a necropsia. RESULTADOS: Houve 100% de mortalidade nos animais do Grupo 1, em 52 horas, 100% nos animais do Grupo 2, em 126 horas e 50% nos animais do Grupo 3 em 50 horas. Os animais do Grupo 4 sobreviveram. A sobrevida, no 11º dia de pós-operatório, foi maior nos grupos 3 e 4 com relação aos grupos 1 e 2 (p < 0,001) e maior nos Grupo 4 com relação ao Grupo 3 (p < 0,01). CONCLUSÕES: A lavagem peritoneal com solução de bupivacaína diluída em solução fisiológica foi eficaz para evitar o óbito, por 11 dias, em 100% dos animais com peritonite fecal. BACKGROUND AND OBJECTIVES: Based on the knowledge of the anti-inflammatory and anti-bacterial actions of local anesthetics (LA), the objective of this study was to determine the effects of peritoneal lavage with bupivacaine on survival of mice with fecal peritonitis. METHODS: Forty-eight Wistar mice, weighing between 300 and 330 g (311.45 ± 9.67 g), undergoing laparotomy 6 hours after induction of peritonitis were randomly divided in 4 groups: 1 - Control, without treatment (n = 12); 2 - Drying of the abdominal cavity (n = 12); 3 - Lavage with 3 mL NS and posterior drying of the abdominal cavity (n = 12); and 4 - Lavage with 8 mg.kg-1 (± 0.5 mL) of 0.5% bupivacaine added to 2.5 mL of NS followed by drying out of the abdominal cavity (n = 12). Animals that died underwent necropsy and the time of death was recorded. Surviving animals were killed on the 11th postoperative day and underwent necropsy. RESULTS: Group 1 presented a 100% mortality rate in 52 hours, 100% mortality rate in Group 2 in 126 hours, and Group 3 presented a 50% mortality rate in 50 hours. Animals in Group 4 survived. Survival on the 11th day was greater in groups 3 and 4 than in Groups 1 and 2 (p < 0.001) and greater in Group 4 than in Group 3 (p < 0.01). CONCLUSIONS: Peritoneal lavage with a solution of bupivacaine diluted in NS was effective in preventing death for 11 days in 100% of animals with fecal peritonitis. JUSTIFICATIVA Y OBJETIVOS: Basados en los conocimientos sobre la acción antiinflamatoria y antibacteriana de los anestésicos locales (AL), el estudio tuvo el objetivo de verificar el efecto del lavado peritoneal con solución de bupivacaína en la sobrevida de ratones con peritonitis fecal por heces autógenas. MÉTODO: Se usaron 48 ratones de la raza Wistar, con peso entre 300 g y 330 g (311,45 ± 9,67), sometidos a la laparotomía 6 horas después de la inducción de peritonitis, distribuidos aleatoriamente en 4 grupos: 1 - Control, ningún tratamiento (n = 12); 2 - Secado de la cavidad abdominal (n = 12); 3 - Lavado de la cavidad abdominal con 3 mL de solución fisiológica a 0,9% y secado (n = 12); 4 - Lavado de la cavidad abdominal con 8 mg.kg-1 (± 0,5 mL) de bupivacaína 0,5%, adicionada a 2,5 mL de solución fisiológica a 0,9% y secado (n = 12). Los animales que murieron fueron llevados a necropsia y el horario del óbito se anotó. Los animales sobrevivientes se sacrificaron al 11º día del postoperatorio y se realizó la necropsia. RESULTADOS: Hubo un 100% de mortalidad en los animales del Grupo 1 en 52 horas, 100% en los animales del Grupo 2, en 126 horas y un 50% en los animales del Grupo 3 en 50 horas. Los animales del Grupo 4 sobrevivieron. La sobrevida, al 11° día del postoperatorio, fue mayor en los grupos 3 y 4 con relación a los grupos 1 y 2 (p < 0,001) y mayor en los Grupo 4 con relación al Grupo 3 (p < 0,01). CONCLUSIONES: El lavado peritoneal con solución de bupivacaína diluida en solución fisiológica fue eficaz para evitar el óbito, por 11 días, en un 100% de los animales con peritonitis fecal.

Sequence analysis of the penA gene, encoding penicillin-binding protein 2 (PBP2), in 30 penicillin-intermediate (PenI) Neisseria meningitidis strains showed altered gene sequences due to the translocation of exogenous DNA blocks derived from commensal neisseriae, which are known to have PBP2 proteins with decreased affinity for the antibiotic. In order to obtain a rapid and reproducible method for predicting the PenI phenotype, a real-time PCR assay was set up with primers and probes designed on the basis of the penA gene. The A→G mutation at codon 566, in the transpeptidase domain of the penA gene (which is present in the whole sample of 30 PenI strains and in all the 41 sequences of PenI meningococci isolated worldwide and has been deposited in the sequence databank), was chosen as a marker of penA translocations. Two hybridization probes were designed to distinguish the wild-type penA gene in penicillin-susceptible (PenS) meningococci from the mutated penA gene at codon 566 in PenI strains. Thermal analysis of probe hybridization revealed a melting temperature difference of at least 6°C between PenI and PenS strains. This real-time PCR protocol characterizes the penicillin phenotype of N. meningitidis in a few hours without DNA sequencing and is useful for rapid screening of the penicillin-intermediate genotype among meningococcal isolates.

Background: Foot infection is the most common cause of non-traumatic amputation in people with diabetes. Most diabetic foot infections (DFIs) require systemic antibiotic therapy and the initial choice is usually empirical. Although there are many antibiotics available, uncertainty exists about which is the best for treating DFIs. Objectives: To determine the effects and safety of systemic antibiotics in the treatment of DFIs compared with other systemic antibiotics, topical foot care or placebo. Search methods: In April 2015 we searched the Cochrane Wounds Group Specialised Register; The Cochrane Central Register of Controlled Trials (CENTRAL; The Cochrane Library); Ovid MEDLINE, Ovid MEDLINE (In-Process & Other Non-Indexed Citations); Ovid EMBASE, and EBSCO CINAHL. We also searched in the Database of Abstracts of Reviews of Effects (DARE; The Cochrane Library), the Health Technology Assessment database (HTA; The Cochrane Library), the National Health Service Economic Evaluation Database (NHS-EED; The Cochrane Library), unpublished literature in OpenSIGLE and ProQuest Dissertations and on-going trials registers. Selection criteria: Randomised controlled trials (RCTs) evaluating the effects of systemic antibiotics (oral or parenteral) in people with a DFI. Primary outcomes were clinical resolution of the infection, time to its resolution, complications and adverse effects. Data collection and analysis: Two review authors independently selected studies, assessed the risk of bias, and extracted data. Risk ratios (RR) were estimated for dichotomous data and, when sufficient numbers of comparable trials were available, trials were pooled in a meta-analysis. Main results: We included 20 trials with 3791 participants. Studies were heterogenous in study design, population, antibiotic regimens, and outcomes. We grouped the sixteen different antibiotic agents studied into six categories: 1) anti-pseudomonal penicillins (three trials); 2) broad-spectrum penicillins (one trial); 3) cephalosporins (two trials); 4) carbapenems (four trials); 5) fluoroquinolones (six trials); 6) other antibiotics (four trials). Only 9 of the 20 trials protected against detection bias with blinded outcome assessment. Only one-third of the trials provided enough information to enable a judgement about whether the randomisation sequence was adequately concealed. Eighteen out of 20 trials received funding from pharmaceutical industry-sponsors. The included studies reported the following findings for clinical resolution of infection: there is evidence from one large trial at low risk of bias that patients receiving ertapenem with or without vancomycin are more likely to have resolution of their foot infection than those receiving tigecycline (RR 0.92, 95% confidence interval (CI) 0.85 to 0.99; 955 participants). It is unclear if there is a difference in rates of clinical resolution of infection between: 1) two alternative anti-pseudomonal penicillins (one trial); 2) an anti-pseudomonal penicillin and a broad-spectrum penicillin (one trial) or a carbapenem (one trial); 3) a broad-spectrum penicillin and a second-generation cephalosporin (one trial); 4) cephalosporins and other beta-lactam antibiotics (two trials); 5) carbapenems and anti-pseudomonal penicillins or broad-spectrum penicillins (four trials); 6) fluoroquinolones and anti-pseudomonal penicillins (four trials) or broad-spectrum penicillins (two trials); 7) daptomycin and vancomycin (one trial); 8) linezolid and a combination of aminopenicillins and beta-lactamase inhibitors (one trial); and 9) clindamycin and cephalexin (one trial). Carbapenems combined with anti-pseudomonal agents produced fewer adverse effects than anti-pseudomonal penicillins (RR 0.27, 95% CI 0.09 to 0.84; 1 trial). An additional trial did not find significant differences in the rate of adverse events between a carbapenem alone and an anti-pseudomonal penicillin, but the rate of diarrhoea was lower for participants treated with a carbapenem (RR 0.58, 95% CI 0.36 to 0.93; 1 trial). Daptomycin produced fewer adverse effects than vancomycin or other semi-synthetic penicillins (RR 0.61, 95%CI 0.39 to 0.94; 1 trial). Linezolid produced more adverse effects than ampicillin-sulbactam (RR 2.66; 95% CI 1.49 to 4.73; 1 trial), as did tigecycline compared to ertapenem with or without vancomycin (RR 1.47, 95% CI 1.34 to 1.60; 1 trial). There was no evidence of a difference in safety for the other comparisons. Authors' conclusions: The evidence for the relative effects of different systemic antibiotics for the treatment of foot infections in diabetes is very heterogeneous and generally at unclear or high risk of bias. Consequently it is not clear if any one systemic antibiotic treatment is better than others in resolving infection or in terms of safety. One non-inferiority trial suggested that ertapenem with or without vancomycin is more effective in achieving clinical resolution of infection than tigecycline. Otherwise the relative effects of different antibiotics are unclear. The quality of the evidence is low due to limitations in the design of the included trials and important differences between them in terms of the diversity of antibiotics assessed, duration of treatments, and time points at which outcomes were assessed. Any further studies in this area should have a blinded assessment of outcomes, use standardised criteria to classify severity of infection, define clear outcome measures, and establish the duration of treatment. © 2015 The Cochrane Collaboration.

Purpose: To investigate the crude oil yield of eight different varieties of soybean (Glycine max L.) seeds after gamma radiation, and also to evaluate the antimicrobial activity and the chemical composition of G.max-Ataem7. Methods: The seeds were irradiated with doses of 0 (control), 100, 200, 300, 400 and 500 Gy gamma radiation. Irradiation was performed in a cesium (Ce137) source. Extraction of the seeds was done with Soxhlet apparatus using petroleum ether. Antimicrobial activity was determined by the standard disc diffusion method. The chemical composition of the extracts was elucidated using gas chromatographymass spectrometry (GS-MS) Results: The highest crude oil yield was obtained at 300 Gy and and content of 35.09% in Ataem7 seeds. There was a decrease in the total content of chlorophyll in Mutant1 (M1) plants after gamma radiation. However, the level of carotenoid increased in M1 plants. Extracts of the G.max-Ataem7 demonstrated strong antibacterial activity against S. aureus ATCC 25923 and E.coli ATCC 25922. The major components of G.max-Ataem7 were linoliec acid (C18:2n6) and oleic acid (C18:1n9) with a content of 60.31 and 21.64%, respectively. Conclusion: The results show that irradiation of is also can be improved if treated with appropriate doses of irradiation. © Pharmacotherapy Group, Faculty of Pharmacy, University of Benin, Benin City, 300001 Nigeria. All rights reserved.

Background: Infection of burn wounds is a serious problem because it can delay healing, increase scarring and invasive infection may result in the death of the patient. Antibiotic prophylaxis is one of several interventions that may prevent burn wound infection and protect the burned patient from invasive infections. Objectives: To assess the effects of antibiotic prophylaxis on rates of burn wound infection. Search methods: In January 2013 we searched the Wounds Group Specialised Register; The Cochrane Central Register of Controlled Trials (CENTRAL); Ovid MEDLINE; Ovid MEDLINE - In-Process & Other Non-Indexed Citations (2013); Ovid EMBASE; EBSCO CINAHL and reference lists of relevant articles. There were no restrictions with respect to language, date of publication or study setting. Selection criteria: All randomised controlled trials (RCTs) that evaluated the efficacy and safety of antibiotic prophylaxis for the prevention of BWI. Quasi-randomised studies were excluded. Data collection and analysis: Two review authors independently selected studies, assessed the risk of bias, and extracted relevant data. Risk ratio (RR) and mean difference (MD) were estimated for dichotomous data and continuous data, respectively. When sufficient numbers of comparable RCTs were available, trials were pooled in a meta-analysis to estimate the combined effect. Main results: This review includes 36 RCTs (2117 participants); twenty six (72%) evaluated topical antibiotics, seven evaluated systemic antibiotics (four of these administered the antibiotic perioperatively and three administered upon hospital admission or during routine treatment), two evaluated prophylaxis with non absorbable antibiotics, and one evaluated local antibiotics administered via the airway. The 11 trials (645 participants) that evaluated topical prophylaxis with silver sulfadiazine were pooled in a meta analysis. There was a statistically significant increase in burn wound infection associated with silver sulfadiazine compared with dressings/skin substitute (OR = 1.87; 95% CI: 1.09 to 3.19, I2 = 0%). These trials were at high, or unclear, risk of bias. Silver sulfadiazine was also associated with significantly longer length of hospital stay compared with dressings/skin substitute (MD = 2.11 days; 95% CI: 1.93 to 2.28). Systemic antibiotic prophylaxis in non-surgical patients was evaluated in three trials (119 participants) and there was no evidence of an effect on rates of burn wound infection. Systemic antibiotics (trimethoprim-sulfamethoxazole) were associated with a significant reduction in pneumonia (only one trial, 40 participants) (RR = 0.18; 95% CI: 0.05 to 0.72) but not sepsis (two trials 59 participants) (RR = 0.43; 95% CI: 0.12 to 1.61). Perioperative systemic antibiotic prophylaxis had no effect on any of the outcomes of this review. Selective decontamination of the digestive tract with non-absorbable antibiotics had no significant effect on rates of all types of infection (2 trials, 140 participants). Moreover, there was a statistically significant increase in rates of MRSA associated with use of non-absorbable antibiotics plus cefotaxime compared with placebo (RR = 2.22; 95% CI: 1.21 to 4.07). There was no evidence of a difference in mortality or rates of sepsis with local airway antibiotic prophylaxis compared with placebo (only one trial, 30 participants). Authors' conclusions: The conclusions we are able to draw regarding the effects of prophylactic antibiotics in people with burns are limited by the volume and quality of the existing research (largely small numbers of small studies at unclear or high risk of bias for each comparison). The largest volume of evidence suggests that topical silver sulfadiazine is associated with a significant increase in rates of burn wound infection and increased length of hospital stay compared with dressings or skin substitutes; this evidence is at unclear or high risk of bias. Currently the effects of other forms of antibiotic prophylaxis on burn wound infection are unclear. One small study reported a reduction in incidence of pneumonia associated with a specific systematic antibiotic regimen. © 2013 The Cochrane Collaboration.

A new thermophilic, carbohydrate-fermenting, obligately anaerobic bacterial species was isolated from a runoff channel formed from flowing bore water from the geothermally heated aquifer of the Great Artesian Basin of Australia. The cells of this organism were nonsporulating, motile, gram negative, and rod shaped and generally occurred singly or in pairs. The optimum temperature for growth was 65 to 68 degrees C, and no growth occurred at temperatures below 44 degrees C or above 80 degrees C. Growth was inhibited by 10 micrograms of lysozyme per ml, 10 micrograms of penicillin per ml, 10 micrograms of tetracycline per ml, 10 micrograms of phosphomycin per ml, 10 micrograms of vancomycin per ml, 10 micrograms of vancomycin per ml, and NaCl concentrations greater than 0.2%. The optimum pH for growth was 7.0, and no growth occurred at pH 5.5 or 8.5. The DNA base composition was 35 mol% guanine plus cytosine, as determined by thermal denaturation. The end products of glucose fermentation were lactate, acetate, ethanol, CO2, and H2. Sulfur, but not thiosulfate, sulfite, or sulfate, was reduced to sulfide. Phase-contrast microscopy of whole cells and an electron microscopic examination of thin sections of cells revealed the presence of single terminal spheroids, a trait common in members of the genus Fervidobacterium. However, a phylogenetic analysis of the 16S rRNA sequence revealed that the new organism could not be assigned to either of the two previously described Fervidobacterium species. On the basis of these observations, we propose that the new organism should be designated a new Fervido-bacterium species, Fervidobacterium gondwanense. The type strain of this species is strain AB39 (= Australian Collection of Microorganisms strain ACM 5017.