An assessment of residual ovine nematodes on pasture under maritime conditions.
Residual ovine nematode pasture infections were assessed by grazing groups of ewes and their lambs on permanent sheep and cattle pastures and by the use of tracer lambs. Ostertagia spp., Cooperia oncophora, Nematodirus spp., Chabertia ovina and Trichuris spp. eggs and/or larvae survived on pastures overwinter. Second generation Ostertagia larvae were present in greatest numbers on pasture during the latter part of August and early September. The failure of a significant build-up of Cooperia oncophora was attributed to negligible worm egg output of this species in sheep. A build-up of Nematodirus spp. on pasture was not detected in this study.
Agriculture Canada, Health of Animals Laboratory, Sackville, New Brunswick.
H J
HJ
Smith
N R
NR
Fulton
D000821:Animal Feed; D000818:Animals; D000831:Animals, Newborn / Q000469:parasitology*; D005243:Feces / Q000469:parasitology; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000453:epidemiology / Q000662:veterinary*; D009349:Nematode Infections / Q000453:epidemiology / Q000662:veterinary*; D009509:New Brunswick; D010270:Parasite Egg Count / Q000662:veterinary; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology / Q000469:parasitology*