gastrointestinal nematode populations in stabled ewes of rimouski region.nematode populations is stabled ewes of the rimouski region were studied by means of fecal worm egg counts, fecal culture of larvae, and worm counts at necropsy. it was found that during the winter strongyle egg counts were low, trichostrongylus eggs being most numerous, the stronglye egg counts increased following lambing and reached peak in june. ostertagia spp was the principal contributor to this "spring-rise", with substantial contribution from trichostrongylus and haemonchus contortus. the ...19734270807
prevalence and distribution of gastrointestinal nematodes on 32 organic and conventional commercial sheep farms in ontario and quebec, canada (2006-2008).in order to characterize the epidemiology of sheep gastrointestinal nematodes in organic and conventional flocks in canada, a longitudinal study was carried out from may 2006 to march 2008 on 32 purposively selected farms in ontario (on) and quebec (qc): 8 certified organic (co), 16 non-certified organic (nco), and 8 conventional (c) farms. on each farm, 10 ewes and 10 female lambs were selected. farm visits were undertaken monthly during the grazing season, and twice in the winter. at each visi ...201020236769
efficiency of a genetic test to detect benzimidazole resistant haemonchus contortus nematodes in sheep farms in quebec, canada.haemonchus contortus is a hemophilic nematode which infects sheep and causes anemia and death to lambs. benzimidazole drugs are used to remove these parasites, but the phenomenon of resistance has arisen worldwide. a sensitive test to detect resistance before treatment would be a useful tool to enable farmers to anticipate the efficiency of the drug before drenching the flock. in this study, we compared a test for benzimidazole resistance based on detection of genetic markers in h. contortus bef ...201323773905
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