anthelmintics

..applicant): Parasitic nematodes plague the world as major contributors to disease, and anti-parasitic drugs (anthelmintics) are the primary control measure...

..activators such as avermectin and moxidectin are also used in ever increasing quantities as insecticides and anthelmintics. More specifically, the goal is to provide toxicological profiles and maps for the insecticide blocker site ..

..the potential to identify novel drug targets that could lead to further studies allowing development of new anthelmintics against a broad spectrum of nematode parasites. ..

..Relevance: Hookworm control is limited to repeated treatment with anthelmintics drugs, which as a long-term strategy suffers from rapid re-infection and the potential for drug resistance...

..Relevance: Hookworm control is limited to repeated treatment with anthelmintics drugs, which as a long-term strategy suffers from rapid re-infection and the potential for drug resistance...

..These studies have the potential to identify novel drug targets that could lead to further studies allowing development of new anthelmintics against a broad spectrum of nematode parasites.

..with the functions of NRs essential for nematode viability will provide leads for the development of novel anthelmintics for the control of important human parasitic nematode infections...

..On each of the four farms where ivermectin gave less than 95% reduction in egg counts, there was resistance to albendazole as well. Levamisole showed an efficacy of 95% or higher on all six farms...

..Further, the possibility of a test returning a false-negative result is raised, indicating that even an efficacy estimated > or =95% may not guarantee the absence of resistant parasites...

..contortus and 23% Teladorsagia/Trichostrongylus. Because there is a lot of trade in sheep on the farm, it is probable that the resistant worms were introduced with livestock from other farms than being selected on the farm...

..This is the first reported case of Haemonchus parasiting cattle showing simultaneous resistance to avermectins and benzimidazole type anthelmintics.

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OBJECTIVE: To determine prevalence of resistance to all anthelmintics that are commonly used to treat gastrointestinal nematodes (GINs) in goats. DESIGN: Prospective study. ANIMALS: 777 goats...

..Steps should be taken to prevent its further spread and to avoid the development of a situation as on numerous commercial sheep farms in South Africa where resistance is very common...

..Whether the dosage of this combination treatment should be adjusted for G. intestinalis remains to be established by further study...

..These results are consistent with the production and antiparasitic effect of high levels of IgE in Schistosoma mansoni infection...

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..A trend to slower development of resistance where a proportion of lambs were left untreated at each drench suggests further work on this aspect of management of resistance is warranted...

..Strongyloides larvae disappeared from the stool by day 4 and from the sputum by day 10. No side effects were encountered during hospitalization or at the 1-month follow-up visit...

..This study demonstrates that selective treatment is both a practical and an effective approach to the management of anthelmintic resistance...

..Treatment with both doses of Coriandrum sativum did not help the animals improve or maintain their PCV while those treated with albendazole showed significant increase in PCV (p<0.05)...

..To prevent high levels of re-infection during the season of the long rains (April to June), it is recommended that, during this season, a second treatment be given 5-6 weeks after the first one or at the start of the dry season...

..the first confirmed report of resistance to a combination drench consisting of three broad-spectrum anthelmintics, the present results provide further evidence of the continuing escalation of multiple anthelmintic resistance ..

Faecal egg count reduction tests (FECRT) were conducted in May 2003 to determine the efficacy of anthelmintics used for treatment against nematode parasites in separately managed sheep and goat flocks at Alemaya University in eastern ..

AIM: To estimate the prevalence of resistance to macrocyclic lactone (ML) anthelmintics over a 3-year period on sheep farms in the Taihape area, and to determine associations between the presence of ML resistance and farm management ..

..contortus. CONCLUSION: Multiple, multi-generic anthelmintic resistance was confirmed on a sheep property in New Zealand. This included the first confirmed case of ivermectin resistance in T. colubriformis from sheep in New Zealand...

..This could accelerate the build-up of resistant worm populations and decrease the time until treatment failure...

..colubriformis and Haemonchus contortus were characterized to provide an insight into the remaining role of anthelmintics in the control of such strains. Homozygous MOX-R individuals of both genera were unaffected by moxidectin...

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..The potential implications of this finding in relation to selection for ML resistance in T. circumcincta are discussed...

..HTLV-1 positive patients must be monitored for years. They and their partners must be instructed how to prevent transmission of the virus...

..By removing the effect of parasites, cattle can grow without the physiological constraints that gastrointestinal parasites place on appetite, digestion, nutrient utilization, and general well being...

..Horses were treated with anthelmintics; faecal sampling (200 g in each sample) for strongylid expulsion was performed 24, 36, 48 and 60 h after ..

..Successful treatment of parasitic infections had no effect on HIV RNA levels. Although common, parasitic infections did not impact HIV RNA levels...

..3% (p<0.0001). We conclude that interventions combining health education, improvement of sanitation and mass treatment effectively control intestinal helminth infections, but the quality of the drugs used is an important factor...

..Therefore, the control of gastrointestinal nematode parasites in ewes in this area should aim at reducing the effects of this phenomenon through treatment of ewes about 2-3 weeks to lambing and during lactation...

..The patient was hospitalized with fever, urticaria, abdominal pain and angioedema. Twelve hours after treatment with intravenous methylprednisolone he had complete resolution of his symptoms...

..However, based on US Food and Drug Administration criteria, these changes were not considered of clinical relevance...

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AIM: To determine associations between resistance of Ostertagia (=Teladorsagia) spp to macrocyclic lactone (ML) anthelmintics and history of use of anthelmintics, by type, on commercial sheep farms in temperate regions of southern South ..

..criteria were chosen at random (n=80) or with a history of suspected resistance to macrocyclic lactone (ML) anthelmintics (n=32)...

..The study provides support for controls that aim to provide refugia of susceptible worms and that minimise the risk of introduction of resistance through effective quarantine drenching...

..However, these data differ from the H. contortus studies in suggesting that ML resistance in O. circumcincta may effectively be rendered incompletely dominant or recessive by treatment with MOX...

..The findings demonstrated that abamectin oral formulation was more effective than abamectin injection against ivermectin-resistant strain of T. colubriformis in sheep...

..Higher concentrations of TCBZ and TCBZSO were recovered from the resistant liver flukes in the presence of ivermectin. Thus, an altered influx/efflux mechanism may account for the development of resistance to TCBZ in F. hepatica...

..Each of the drugs produced egg reduction rates in excess of 98%. There were no significant adverse events or abnormalities in haematology or clinical chemistry values or urinalysis...

..The 3 species of plovers are highly susceptible to experimental G. seoi infection, suggesting that they could play a role as definitive hosts for these worms in nature...

..Praziquantel was not shown to have synergistic or antagonistic effects with albendazole. A regimen of 400 mg of albendazole daily for 3 days was found to be the most suitable therapy for Trichuris infection...

..Oral dosing with moxidectin was effective in removing adult female burdens of ivermectin-resistant T. circumcincta, but the effect of the drug did not persist against the resistant helminth population...

..It is also likely to be cost-effective, considering the low cost of anthelmintics in relation to the price of lambs, to counter the possibility of a loss in production if lambs were to harbour ..

..ovis was 97.7 per cent. The mean (se) systemic area under the curve (AUC) was 56.0 (26.2) ng/day/ml and the mean residence time was 5.3 (1.0) days, but there were wide variations between individual sheep...

..6% cure rate and the placebo at 15.9%. At the single dose, benzimidazole could not completely expelled the haplorchid; but could reduce one third to two fifth of the infection, similar to the drugs efficacy against Trichuris infection...

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..834 g/dL after treatment was found. Our results suggest that anemia is associated with schistosomiasis and hookworm in Ugandan children and that such anemia shows a significant improvement after chemotherapy...

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..077). There was, therefore, no evidence that albendazole controlled-release capsules caused suppression of egg output in this species...

..Egg counts fell significantly in the individuals remaining positive for Tt. It is recommended that antihelminthic treatment should be selective and given at yearly intervals preferably with albendazole, due to its cost-effectiveness...

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..Although granuloma sizes were generally similar for all isolates, the praziquantel-resistant isolates may be more pathogenic in mice than the susceptible ones because of their relatively high egg productions...