| some analyses of exsheathing fluid from infective haemonchus contortus larvae from ontario. | | 1974 | 4217323 |
| morphological types in haemonchus contortus (nematoda) populations in ontario sheep. | | 1973 | 4778357 |
| 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 ... | 2010 | 20236769 |
| pilot project to investigate over-wintering of free-living gastrointestinal nematode larvae of sheep in ontario, canada. | this study investigated the overwintering survival and infectivity of free-living gastrointestinal nematode (gin) stages on pasture. the presence of gin larvae was assessed on 3 sheep farms in ontario with a reported history of clinical haemonchosis, by collecting monthly pasture samples over the winter months of 2009/2010. the infectivity of gin larvae on spring pastures was evaluated using 16 tracer lambs. air and soil temperature and moisture were recorded hourly. free-living stages of tricho ... | 2014 | 25082990 |
| assessment of benzimidazole resistance in haemonchus contortus in sheep flocks in ontario, canada: comparison of detection methods for drug resistance. | in 2011, a field study was conducted to assess drug resistance of gastro-intestinal nematodes in sheep flocks in ontario, canada. benzimidazole resistance in haemonchus contortus was assessed by genetic analysis of eggs; measurement of resistant allele percentages at codons 167, 198 and 200 in the β-tubulin gene was determined on pools of h. contortus eggs using pyrosequencing. susceptibility to benzimidazoles in gastro-intestinal nematodes was also determined using a faecal egg count reduction ... | 2013 | 23993632 |