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Background The currently recommended benzimidazole monotherapy is insufficiently effective to control infection with the soil-transmitted helminth Trichuris trichiura. Ivermectin-albendazole combination has shown promising, but setting-dependent efficacy, with therapeutic underperformance in Côte d'Ivoire. We evaluated whether moxidectin-albendazole could serve as an alternative to albendazole monotherapy in Côte d'Ivoire. Methods In this community-based, randomized, placebo-controlled, parallel-group superiority trial, individuals aged 12–60 years were screened for T. trichiura eggs in their stool using quadruplicate Kato-Katz thick smears. Diagnostically and clinically eligible participants were randomly assigned (1:1:1) to receive single oral doses of moxidectin (8 mg) and albendazole (400 mg), ivermectin (200 µg/kg) and albendazole (400 mg), or albendazole (400 mg) and placebo. The primary outcome was proportion cured, ie, cure rate (CR), assessed at 2–3 weeks post-treatment. Safety endpoints were assessed pre-treatment and at 3 and 24 hours post-treatment. Results For the 210 participants with primary outcome data, we observed CRs of 15.3% in the moxidectin-albendazole arm and 22.5% in the ivermectin-albendazole arm, which did not differ significantly from the CR of 13.4% in the albendazole arm (differences: 1.8%-points [95% confidence interval: −10.1 to 13.6] and 9.1%-points [−3.9 to 21.8], respectively). Most common adverse events were abdominal pain (range across arms: 11.9%–20.9%), headache (4.7%–14.3%), and itching (5.8%–13.1%), which were predominantly mild and transient. Conclusions All therapies showed similar low efficacy in treating trichuriasis in Côte d'Ivoire. Alternative treatment options need to be evaluated, and further analyses should be conducted to understand the lack of enhanced activity of the combination therapies in Côte d'Ivoire. Clinical Trials Registration NCT04726969. [ABSTRACT FROM AUTHOR]

Background: Preventive chemotherapy with albendazole or mebendazole remains one of the cornerstones of soil-transmitted helminth control. However, these drugs are less effective against Trichuris trichiura. Combined ivermectin-albendazole is a promising treatment alternative, yet robust evidence is lacking. We aimed to demonstrate superiority of co-administered ivermectin-albendazole over albendazole monotherapy in three distinct epidemiological settings.Methods: We conducted a double-blind, parallel-group, phase 3, randomised controlled trial in community members aged 6-60 years infected with T trichiura in Côte d'Ivoire, Laos, and Pemba Island, Tanzania, between Sept 26, 2018, and June 29, 2020. Participants with at least 100 T trichiura eggs per g of stool at baseline were randomly assigned (1:1) using computer-generated randomisation sequences in varying blocks of four, six, and eight, stratified by baseline T trichiura infection intensity, to orally receive either a single dose of ivermectin (200 μg/kg) plus albendazole (400 mg) or albendazole (400 mg) plus placebo. Patients, field staff, and outcome assessors were masked to treatment assignment. The primary outcome was cure rate against T trichiura, defined as the proportion of participants with no eggs in their faeces 14-21 days after treatment, assessed by Kato-Katz thick smears, and analysed in the available-case population according to intention-to-treat principles. Safety was a secondary outcome and was assessed 3 h and 24 h after drug administration. The trial is registered at ClinicalTrials.gov, NCT03527732.Findings: Between Sept 13 and Dec 18, 2019, Jan 12 and April 5, 2019, and Sept 26 and Nov 5, 2018, 3737, 3694, and 1435 community members were screened for trial eligibility in Côte d'Ivoire, Laos, and Pemba Island, respectively. In Côte d'Ivoire, Laos, and Pemba Island, 256, 274, and 305 participants, respectively, were randomly assigned to the albendazole group, and 255, 275, and 308, respectively, to the ivermectin-albendazole group. Primary outcome data were available for 722 participants treated with albendazole and 733 treated with ivermectin-albendazole. Ivermectin-albendazole showed significantly higher cure rates against T trichiura than albendazole in Laos (66% [140 of 213]vs 8% [16 of 194]; difference 58 percentage points, 95% CI 50 to 65, p<0·0001) and Pemba Island (49% [140 of 288]vs 6% [18 of 293], 43 percentage points, 36 to 49, p<0·0001) but had similar efficacy in Côte d'Ivoire (14% [32 of 232]vs 10% [24 of 235], 4 percentage points, -2 to 10, p=0·24). No serious adverse events were reported; observed events were mostly classified as mild (95% [266 of 279] in the albendazole group and 91% [288 of 317] in the ivermectin-albendazole group), and all were transient in nature.Interpretation: Treatment with ivermectin-albendazole resulted in higher efficacy against trichuriasis than albendazole alone in Laos and Pemba Island but not in Côte d'Ivoire. We recommend implementation of this combination therapy for soil-transmitted helminth control in countries with high T trichiura prevalence and proven enhanced efficacy of this treatment, particularly where ivermectin is beneficial against other endemic helminthiases.Funding: Bill & Melinda Gates Foundation. [ABSTRACT FROM AUTHOR]

In this research, we present evidence-based data for the longevity of T. trichiura on a healthy volunteer who had ingested eggs of T. trichiura. Hence, T. trichiura lives in a human host for at least 6 years and 5 months. Concurrently, this study highlighted consideration for returning travellers and migrants. [ABSTRACT FROM AUTHOR]

Soil-transmitted helminths (Ascaris lumbricoides, hookworm and Trichuris trichiura) infect about one-fifth of the world's population. The currently available drugs are all highly efficacious against A. lumbricoides. However, they are only moderately efficacious against hookworm and poorly efficacious against T. trichiura. Oxantel, a tetrahydropyrimidine derivative discovered in the 1970s, has recently been brought back to our attention given its high efficacy against T. trichiura infections (estimated 76% cure rate and 85% egg reduction rate at a 20 mg/kg dose). This review summarizes the current knowledge on oxantel pamoate and its use against T. trichiura infections in humans. Oxantel pamoate acts locally in the human gastrointestinal tract and binds to the parasite's nicotinic acetylcholine receptor (nAChR), leading to a spastic paralysis of the worm and subsequent expulsion. The drug is metabolically stable, shows low permeability and low systemic bioavailability after oral use. Oxantel pamoate was found to be safe in humans, with only a few mild adverse events reported. Several clinical trials have investigated the efficacy of this drug against T. trichiura and suggest that oxantel pamoate is more efficacious against T. trichiura than the currently recommended drugs, which makes it a strong asset to the depleted drug armamentarium and could help delay or even prevent the development of resistance to existing drugs. We highlight existing data to support the use of oxantel pamoate against T. trichiura infections. [ABSTRACT FROM AUTHOR]

Parasitic disorders affecting the liver in children include amebiasis, visceral leishmaniasis (Kala Azar), ascariasis, hepatic capillariasis, strongyloidiasis, toxocariasis, echinococcosis (hydatidosis), fascioliasis, schistosomiasis, clonorchiasis, and opisthorchiasis. Emphasis is placed on identifying the responsible parasite (i.e., protozoa, nematodes, cestodes, trematodes) along with principles of diagnosis, clinical symptomatology, and management. Clinicians should keep in mind that the liver is often affected by parasites, including those listed herein. [ABSTRACT FROM AUTHOR]

Dioctophymosis is a zoonotic parasitic disease caused by Dioctophyma renale (Goeze, 1782). It is distributed worldwide and it affects a large number of wild and domestic mammals. Here we report the first confirmed case of canine dioctophymosis in Colombia. The animal was found dead in the streets of the municipality of Yondó, Antioquia, and its dead body was taken to the Instituto Universitario de la Paz (UNIPAZ) to carry out a necropsy. A parasite worm was found in the right kidney and sent for identification to the Laboratorio de Parasitología of the Universidad de Santander (UDES). The specimen was identified as a male of D. renale upon observing the typical oval and transversely elongated bell-shaped bursa copulatrix with a spicule and no rays. Another important factor to confirm the diagnosis was the anatomical location in the kidney. This is the first time D. renale is reported in a stray dog in Colombia.

Background: Soil transmitted helminths (STH) are intestinal nematodes and constitute one of the most neglected tropical diseases to exist. Objective: This study determined the efficacy of albendazole-pyrantel pamoate compared to albendazole in 8-12 years old children with Trichuris trichiura infection. Methods: A randomised controlled trial was conducted between October 2017 and February 2018 on participants whose stool examinations confirmed the presence of Trichuris trichiura infection. The subjects were randomised into two groups. The statistical analysis used Chi-square test. Results: There were 392 of 600 children at five public elementary schools in Bangli and Bali and were infected with Trichuris trichiura. The cure rate of Trichuris trichiura infection seven days following treatment was lower with the combination of albendazole and pyrantel pamoate compared to that of albendazole. The egg reduction rate of Trichuris trichiura infection was lower with the combination of albendazole and pyrantel pamoate compared to albendazole. Conclusion: The study indicated that a combination of albendazole and pyrantel pamoate does not improve cure rate or egg reduction rate in 8--12 years old children with Trichuris trichiura infection. [ABSTRACT FROM AUTHOR]

Background Preventive chemotherapy is the main strategy to control soil-transmitted helminth (STH) infections. Albendazole and mebendazole are ubiquitously used, but they are not sufficiently effective against Trichuris trichiura. Moxidectin might be a useful addition to the small drug armamentarium. However, the optimal dosage of moxidectin alone and in combination with albendazole against T. trichiura and other STHs has not yet been determined. Methods A Phase II, randomized, placebo-controlled, dose-finding trial was conducted in 2 secondary schools on Pemba Island, Tanzania. Using a computer-generated list, T. trichiura– infected adolescents were randomly assigned to 7 treatment arms: 8, 16, or 24 mg of moxidectin monotherapy; 8, 16, or 24 mg of moxidectin plus 400 mg of albendazole combination therapy; or placebo. The primary outcome was cure rate (CR) against T. trichiura, analyzed 13 to 20 days after treatment by quadruple Kato-Katz thick smears. Results A total of 290 adolescents were enrolled (41 or 42 per arm). CRs against T. trichiura were 43, 46, and 44% for 8, 16, and 24 mg of moxidectin alone, respectively; 60, 62, and 66% for the same moxidectin dosages plus 400 mg of albendazole, respectively; and 12% for placebo. The moxidectin-albendazole arms also revealed higher CRs and egg reduction rates against hookworm than the monotherapy arms. Moxidectin and its combination with albendazole were well tolerated. Conclusions Moxidectin-albendazole is superior to moxidectin. There is no benefit of using doses above 8 mg, which is the recommended dose for onchocerciasis. The moxidectin-albendazole combination of 8 mg plus 400 mg should be investigated further to develop recommendations for appropriate control of STH infections. Clinical Trials Registration NCT03501251. [ABSTRACT FROM AUTHOR]

Feline pulmonary capillariosis is a significant disorder due to its distribution and clinical impact. This study evaluated the safety and efficacy of two administrations 28 days apart of a topical solution containing esafoxolaner, eprinomectin and praziquantel (NexGard ® Combo) in treating Eucoleus aerophilus (syn. Capillaria aerophila) infection in naturally infected cats. Cats were allocated to two groups: G1 cats (n = 23) received two treatments at study days (SDs) 0 and 28 (±2) and were evaluated for 6 weeks, and G2 cats (n = 17) served as a negative control for 6 weeks and were then treated twice on SDs 42 (±2) and 70 (±2), allowing for an additional 6-week assessment of efficacy. Each cat was subjected to McMaster coproscopy at SDs -7/0, 28 (±2) and 42 (±2) for both groups, 70 (±2) and 84 (±2) only for G2. Clinical examination and chest radiographic images were performed at SDs 0, 28 (±2) and 42 (±2) for G1 and G2, 70 (±2) and 84 (±2) only for G2. The comparison of EPG (eggs per gram of feces), clinical (CS), and radiographic scores (RS) at each time-point was used as a criterion. The efficacy based on the EPG reduction was 99.5% (G1) and 100% (G2) after two administrations of NexGard ® Combo 2 weeks apart. At SD 0, no significant differences for CS and RS were recorded between G1 and G2, while a significant reduction (p < 0.05) was observed post-treatment for CS, RS, oculo-nasal discharge, auscultation noises, and cough. Two doses of NexGard ® Combo 28 days apart stopped egg shedding and significantly improved clinical alterations in cats infected by E. aerophilus., (© A. Di Cesare et al., published by EDP Sciences, 2024.)

Background: Soil-transmitted helminths (STH) infections lead to nutritional disorder and anemia among children. Albendazole 400 mg is used to control STH, although it has a low cure rate for Trichuris trichiura. The effectiveness of albendazole could be increased by giving a dose of 400 mg for 3 consecutive days. The aim of the study was to investigate the effectiveness of the triple-dose albendazole 400 mg course in decreasing STH and anemia prevalence. Methods: This study used an experimental comparative design conducted in July 2016 and January 2017 in Perobatang Village, Southwest Sumba, Indonesia. Children aged 1-15 years were asked to collect fecal samples to be examined using a Kato-Katz method. Hemoglobin level (Hb) was tested using a rapid test diagnostic strip. STH positive subjects were given 400 mg of albendazole for 3 days witnessed by the researchers. Six months after, the stool samples and Hb levels were re-examined (post-test). Results: From the 156 subjects examined (pretest), the prevalence of Ascaris lumbricoides, Trichuris trichiura, and hookworm were 65.4%, 55.8%, and 15.4%, respectively, and the prevalence of anemia was 71.2%. On post-test, the prevalence of A. lumbricoides, T. trichiura, and hookworm decreased to 8.3%, 12.8%, and 0%, respectively, and the prevalence of anemia decreased to 25%. There was a significant difference in the prevalence of STH infection and anemia before and after the administration of triple-dose albendazole (p=0.001). Conclusion: The triple-dose albendazole is effective in reducing the prevalence of STH and anemia in children with STH infection. [ABSTRACT FROM AUTHOR]

Background Although trichuriasis affects millions of children worldwide, recommended drugs lack efficacy and new treatment options are urgently needed. Ivermectin has promising potential to complement the anthelminthic armamentarium. Methods A randomized placebo-controlled trial was conducted in rural Côte d'Ivoire to provide evidence on the efficacy and safety of ascending oral ivermectin dosages in preschool-aged children (PSAC) and school-aged children (SAC) infected with Trichuris trichiura. The primary outcome was the cure rate (CR) for T. trichiura infection, and the secondary outcomes were safety, egg-reduction rates (ERRs) against T. trichiura infection, and CRs and ERRs against other soil-transmitted helminth species. Results A total of 126 PSAC and 166 SAC were included in an available case analysis. In PSAC, efficacy against T. trichiura did not differ between 200 µg/kg ivermectin and placebo treatment arm, as expressed in CRs (20.9% [95% confidence interval {CI}, 11.9%–52.8%] vs 19.5% [10.4%–49.9%]) and geometric mean ERRs (78.6% [60.1%–89.5%] vs 68.2% [40.5%–84.8%]). In SAC, the highest administered ivermectin dose of 600 µg/kg had a low CRs (12.2% [95% CI, 4.8%–32.3%]) and moderate ERRs (66.3% [43.8%–80.2%]). Only mild adverse events and no organ toxicity, based on serum biomarkers, was observed. Conclusion Ivermectin can be administered safely to PSAC with trichuriasis. Given the low efficacy of ivermectin monotherapy against T. trichiura infection, further research should investigate the optimal drug combinations and dosages with ivermectin against soil-transmitted helminthiasis. Clinical Trials Registration ISRCTN15871729 (www.isrctn.com). [ABSTRACT FROM AUTHOR]

Background: The recommended anthelmintics show low efficacy in a single-dose regimen against Trichuris trichiura. Moxidectin, a new treatment for river blindness, might complement the drug armamentarium for the treatment and control of soil-transmitted helminthiasis. However, its efficacy against T trichiura has not yet been studied. The aim of the study was to assess the efficacy of moxidectin alone and in co-administrations against T trichiura infection.Methods: A randomised, single-blind, non-inferiority trial was done in two primary schools and one secondary school in Pemba, Tanzania. Adolescents aged 12-18 years who tested positive for T trichiura were randomly assigned (5:5:3:3) with a computer-generated sequence to receive moxidectin (8 mg) plus albendazole (400 mg), albendazole (400 mg) plus oxantel pamoate (25 mg/kg; reference treatment), moxidectin (8 mg) plus tribendimidine (200 mg or 400 mg), or moxidectin (8 mg) alone. Study group assignments were masked from participants and laboratory technicians. The primary outcome was non-inferiority with a 2 percentage point margin for egg reduction rate (ERR) against T trichiura assessed as the relative change in the geometric mean egg counts from baseline to 14-21 days after treatment with the Kato-Katz method, based on the available case population. Cure rates (CR) and tolerability (assessed 3, 24, and 48 h post treatment) were secondary outcomes. The study is registered at ISRCTN (number 20398469) and is closed to accrual.Findings: 701 students were enrolled between April 1, and Aug 7, 2017. Primary outcome data were available for 634 students. We observed ERRs of 98·5% for moxidectin plus albendazole and 99·8% for albendazole plus oxantel pamoate, resulting in an absolute difference of -1·2 percentage points (95% CI -1·8 to -0·8), meeting the non-inferiority margin. 100 (51%) of 197 students receiving moxidectin plus albendazole and 166 (83%) of 200 receiving albendazole plus oxantel pamoate were cured, indicating a difference of 32 percentage points (odds ratio 5·3, 95% CI 3·3 to 8·7). ERRs were 91·6% for moxidectin-tribendimidine and 83·2% for moxidectin. Only mild adverse events (mainly headache and stomach pain) were reported. The largest number of adverse events (126 [20%] of 632 students) was observed 24 h post treatment, with no difference among the individual treatment arms (ranging from 23 [19%] of 118 students treated with moxidectin to 38 [19%] of 199 with moxidectin plus albendazole).Interpretation: Moxidectin plus albendazole showed non-inferiority to albendazole plus oxantel pamoate in terms of ERR; however, albendazole plus oxantel pamoate showed a considerably higher cure rate. Dose-optimisation studies with moxidectin and moxidectin plus albendazole should be considered since the efficacy of the dose used for the treatment of onchocerciasis (8 mg) in this study might not be optimal for the treatment of T trichiura infections.Funding: Thrasher Foundation. [ABSTRACT FROM AUTHOR]

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Background: Preventive chemotherapy is the current strategy to control soil-transmitted helminth infections (caused by Ascaris lumbricoides, hookworm, and Trichuris trichiura). But, to improve efficacy and avoid emerging resistance, new drugs are warranted. Tribendimidine has shown good anthelmintic efficacy and is therefore a frontrunner for monotherapy and combination chemotherapy.Methods: We did a randomised, controlled, single-blinded, non-inferiority trial on Pemba Island, Tanzania, and in Côte d'Ivoire. We recruited adolescents aged 15-18 years from four primary schools on Pemba, and school attendees and non-schoolers from two districts in Côte d'Ivoire. Only hookworm-positive participants were randomly assigned (1:1:1:1) to single, oral doses of tribendimidine 400 mg plus placebo (tribendimidine monotherapy), tribendimidine 400 mg plus ivermectin 200 μg/kg, tribendimidine 400 mg plus oxantel pamoate 25 mg/kg, or albendazole 400 mg plus oxantel pamoate 25 mg/kg. Randomisation was done via a computer-generated list in block sizes of four or eight. Participants were asked to provide two stool samples on 2 consecutive days at baseline and again 14-21 days at follow-up. The primary outcome was the difference in egg-reduction rates (ERRs; ie, the geometric mean reduction) in hookworm egg counts between treatment groups, measured by the Kato-Katz technique. Differences in coadministrated treatment groups were assessed for non-inferiority with a margin of -3% to albendazole plus oxantel pamoate based on the available-case population, analysed by intention to treat. Safety was assessed 3 h and 24 h after treatment. This study is registered with ISRCTN (number 14373201).Findings: Between July 26, and Dec 23, 2016, we treated 636 hookworm-positive participants, and outcome data were available for 601 participants (151 assigned to tribendimidine monotherapy, 154 to tribendimidine plus ivermectin, 148 to tribendimidine plus oxantel pamoate, and 148 to albendazole plus oxantel pamoate). Tribendimidine plus ivermectin was non-inferior to albendazole plus oxantel pamoate (ERRs 99·5% [95% CI 99·2-99·7] vs 96·0% [93·9-97·4]; difference 3·52 percentage points [2·05-5·65]). Likewise, tribendimidine plus oxantel pamoate was non-inferior to albendazole plus oxantel pamoate (ERRs 96·5% [95% CI 94·9 to 97·6] vs 96·0% [93·9 to 97·4]; difference 0·48 percentage points [-1·61 to 2·88]). 3 h after treatment, headache (n=50 [8%]) and vertigo (n=37 [6%]) were the most widely reported symptoms; 24 h after treatment, 50 (8%) patients reported vertigo and 41 (7%) reported headache. Mainly mild adverse events were reported with peak numbers (n=111 [18%]) at 24 h after treatment. Three participants had moderate adverse events 3 h after treatment: two (<1%) had vertigo and one (<1%) had headache, and two had moderate adverse events 24 h after treatment: one (<1%) had vomiting and one (<1%) had vomiting plus diarrhoea.Interpretation: Tribendimidine in combination with either ivermectin or oxantel pamoate had a similar, non-inferior efficacy profile as albendazole plus oxantel pamoate, hence tribendimidine will be a useful addition to the depleted anthelmintic drug armamentarium.Funding: Swiss National Science Foundation. [ABSTRACT FROM AUTHOR]

Objective: To determine the prevalence of schistosomiasis (SCH) and soil-transmitted helminths (STH) in the Democratic Republic of Congo, and to assess the capacity of the local health centres for diagnosis and treatment.Methods: Cross-sectional school-based survey in two health districts in the Province of Kwilu. We collected a stool and a urine sample for parasitological examination. Urine filtration and duplicate Kato-Katz thick smears were used for the diagnosis of SCH. Health centres were evaluated using a structured questionnaire.Results: In total, 526 children participated in the study and the overall prevalence of Schistosoma mansoni infection was 8.9% (95% CI: 3.5-13.2) in both districts. The prevalence was higher in Mosango (11.7%; 95% CI: 8.9-14.8) than Yasa Bonga district (6.2%; 95% CI: 1.1-11.4). Urine filtration showed that Schistosoma haematobium infection was not present. The combined STH infection prevalence was 58.1% in both districts; hookworm infection was the most common STH found in 52.9% (95% CI: 29.3-62.4) of subjects, followed by Ascaris lumbricoides 9.3% (95% CI: 5.8-15.5) and Trichuris trichiura 2.1% (95% CI: 0.9-4.9). Mixed STH infections were observed as well as SCH-STH coinfection.Conclusion: Further mapping of both SCH and STH burden is needed, and coverage of preventive chemotherapy in school-aged children should be increased. [ABSTRACT FROM AUTHOR]

Background: Infection is a recognised risk factor for Alzheimer's disease (AD) and can worsen symptoms in established disease. AD patients have higher rates of infection and are more likely to require hospital admissions due to infections than individuals without dementia. Infections have also been found to increase the risk of those over 84 years of age being diagnosed with dementia. However, few studies have investigated immune responses to infection in AD.Methods: Here, we investigated the immune responses of the triple transgenic Alzheimer's disease (3xTg-AD) mouse model of AD to infection with the parasites Toxoplasma gondii and Trichuris muris. Cytometric bead array, histology, immunohistochemistry and immunofluorescence were used to evaluate immune responses and the effects on the brain of acute infection.Results: 3xTg-AD mice, despite having comparable parasite loads, were more susceptible to infection with more severe morbidity. A worsened outcome to infection can be linked to an exaggerated immune response. 3xTg-AD mice had an increased pro-inflammatory response characterised by the production of pro-inflammatory mediators such as tumour necrosis TNF-α, IL-6, CCL5 and CXCL-1, as well as an increase in immune cell infiltration to the sites of infection. T cell responses to parasite antigen also showed elevated production of the pro-inflammatory cytokines TNF-α (10 fold) and IL-6 (twofold). We investigated whether 3xTg-AD mice had a propensity for a more Th1-dominated response using the T. muris worm infection and showed that akin to T. gondii, there was an enhanced pro-inflammatory response which was associated with retention of worms in the gut and associated pathology. Irrespective of whether the infection was one that could infect the brain or cause a local gut inflammation, 3xTg-AD mice had increased numbers of activated microglia during infection in both the cortex and the hippocampus.Conclusions: Our findings suggest that in AD, responses to infection are exaggerated outside of the CNS. Additionally, the results presented here indicate that both systemic and localised inflammation caused by an infection exacerbate neuroinflammation in AD. [ABSTRACT FROM AUTHOR]