parasite egg count

..These results suggest lack of knowledge about worm-control strategies and anthelmintic use or unwillingness to apply such knowledge...

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..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...

..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 individual-based FECR presented lower values than the average-based FECR in most cases. The individual FECR provided reliable evaluation when egg counts were over 300 eggs/g and when at least 10 animals were tested...

..Sheep farmers and advisors in New Zealand need to re-evaluate the way they manage parasites, and more research is urgently needed if the steady decline in anthelmintic susceptibility is to be halted...

..The results suggest that Haemonchus, Trichostrongylus and Strongyloides species may be the major contributors to small ruminant helminthiasis in the study area...

..Based on this study, it is now possible to explore the possibility of using strategic treatments for the control of parasitic gastroenteritis in this area of Kenya...

..These findings indicate that viable internal parasite control should be implemented in the study area in order to increase the productivity of the livestock there...

..0% on day 60. On farm B, on the same days, they were 95.4, 84.9, and 69.4%, respectively. In the course of the two trials, eprinomectin was well tolerated by all the animals with no adverse reactions following the topical treatment...

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

..The results are discussed in relation to the importance of controlling livestock before importation...

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..12, and 0.11, 0.22 and 0.12. Based on segregation of infection, larger heritabilities and maternal environment effects that declined after weaning, the summer natural infection was probably the best model for assessing genetic variation...

..In the dry season there was a decrease in both of these traits, which were intimately linked to the quality of available forage under tropical conditions...

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..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...

..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...

..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...

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..In conclusion, legume forages have the potential to contribute to the control of abomasal but not small intestine nematode parasites in finishing lamb systems...

..contortus infections of sheep and goats on all farms. Drastic changes in animal management need to be made in an attempt to deal with this situation, for which suggestions are made...

..There were no signs of copper toxicity in ewes or lambs. Alternative suppression of H. contortus infections may be necessary in ewes, but COWP was effective in H. contortus management for lambs...

..01-5.08). CONCLUSION: Use of MOX for > or =2 of the preceding 5 years was associated with a higher prevalence of resistance to ML by Ostertagia spp on sheep farms in south eastern Australia than the use of IVO...

..Further investigation is required to develop control strategies which minimise selection for resistant worms, and how these may vary with climate...

..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...

..They also lend support to suggestions that the recently completed national survey may have provided a conservative estimate of the prevalence of such resistance...

..The high prevalence of resistance to multiple anthelmintics emphasizes the need for reexamination of nematode control practices...

..Small-stock farmers are, however, encouraged to control helminth infections in their sheep and goats by anthelmintic treatment...

..It is suggested that T. canis infected military dogs would be a threat not only for dog trainers but also for military personnel, notably during national and international operations...

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..They contribute to the spread of the faecal material on the pasture and allow the larval death as a consequence of drying...

..The comparison of selected resistant rams to selected susceptible ones and not to unselected controls gave more rapid information about the tendency of the regulation of the communities of nematode parasites...

..1% reduction for H. contortus, and 100% for Cooperia sp. in the area with fungi. In the case of Trichostrongylus sp. no reduction was observed, when compared to the control group...

..Fecal egg counts can be used to monitor control programs and drug efficacy and evaluate levels of pasture contamination...

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..A breed difference in resistance to GI parasites was also observed in older ewes. In both breeds, an age effect on the FEC was observed with younger ewes having greater FEC than older ewes...

..chirata administered as crude powder (CP), CAE and CME at the dose of 3 g/kg to sheep naturally infected with mixed species of gastrointestinal nematodes, showed a significant reduction in egg per gram of faeces...

..Results obtained in this study confirm the epidemiological importance of the over-wintering L(3) generation as the initial source of the animal's infection and the origin of the annual resumption of pasture contamination cycles...

..This could be used to evaluate the efficacy of D. flagrans for the control of gastrointestinal nematode larvae in sheep faeces...

..01). Relative resistance of mature Dorper crossbred ewes was comparable to that of Katahdin and St. Croix ewes and superior to that of Hampshire ewes...

..5% compared to the control group, while the reduction in C. oncophora worm burden was 57%. An additional benefit of the long acting parasitological control, was reduced pasture contamination...

..We conclude that, the establishment of O. ovis larvae in the upper respiratory tract has initiated higher inflammatory cellular activity in group OH there by influencing the development and fecundity of H. contortus in the abomasum...

..This response is accompanied by increases of nematode-specific IgG1, IgA, IgG2 and IgM, as well as of total IgE in lymph plasma...

..colubriformis larvae in the regional lymph node...

..However, recovery in livestock numbers is likely to lead to increased levels of infection and production loss unless sustainable control strategies are put in place...

..The evidence suggests that susceptibility in Suffolks may be mediated through poor IgE affinity/avidity and/or through deficiencies in related mechanisms such as mast cell production, recruitment or activation...

..In conclusion, the rotation control strategy showed promising results, whereas the strategic feeding was poor from a parasite control standpoint...

..This response pattern may imply a rebound effect during reinfection following treatment and resolution of immune regulatory immunosuppressive mechanisms in function during the chronic infection...

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..These results indicate that this assay is a reliable and ultrasensitive method for detecting subnanogram amounts of F. hepatica antigens in feces from sheep and cattle, facilitating early diagnosis...

..hepatica infections in cattle and sheep. The assay may also be useful for diagnosing F. gigantica infections but further studies are required to establish sensitivity and specificity...

..Diagnosis of infection with F. hepatica was achieved much earlier than is possible with current parasitological techniques. This could help with the control of fasciolosis, enabling treatment before clinical manifestation of the disease...