کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2457000 1554366 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Strategic control of gastrointestinal nematodes in grazing sheep with a long-acting moxidectin formulation
ترجمه فارسی عنوان
کنترل استراتژیک نماتد های دستگاه گوارش در گوسفند گاو با فرمولاسیون مکسیدکتین طولانی مدت
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
چکیده انگلیسی


• Untreated lambs grazing with moxidectin LA-treated ewes show lower GIN-egg excretion compared with controls (p < 0.05).
• The same lambs exhibit a higher daily weight gain compared with controls (p < 0.05).
• Differences were due to an indirect effect mediated by the lower pasture contamination with GIN-larvae.

A field study was undertaken on three Swiss sheep farms (A, B, C) to evaluate the efficacy of a long-acting moxidectin formulation (Cydectin® 2% LA) against gastrointestinal nematodes (GIN). Naturally infected ewes (all three farms) and their winter-borne lambs (farms A and B) were allocated to two groups (MOX, CON). At day 0 ewes of the MOX-groups were treated with 1 mg moxidectin s.c. CON- and MOX-groups were grazed on separate pastures and were sampled for faeces and blood at 28-day intervals. Larval cultures demonstrated that Haemonchus contortus was the dominant GIN-species in ewes throughout the season. Over the entire observation period faecal egg count (FEC) of the MOX-ewes in farms A, B, C was 56%, 84% and 87% less than the CON-ewes (p < 0.05). FEC of lambs grazing with MOX-ewes was reduced in farms A and B by 56% and 61%, respectively (p < 0.05), compared with the respective CON-groups. None of these lambs received anthelmintic treatment during the experiment. Therefore, the differences were due to an indirect effect mediated by the lower pasture contamination with GIN-larvae. These were reduced by 73%, 81% and 74% in farms A-C respectively compared to the CON-groups (p < 0.05). In farm B, where lambs remained with their mothers during the entire grazing season, these differences were also reflected by a higher daily weight gain (p < 0.05) and reduced pepsinogen levels in lambs of treated ewes. This strategy offers an interesting potential for expanding refugia by propagation of GIN in untreated lambs.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Small Ruminant Research - Volume 126, May 2015, Pages 80–89
نویسندگان
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