Deworming Effect of Ivermectin on Gastrointestinal Nematodes in Holstein Heifers on Pasture

PCR-based Species-Specific Amplification of ITS of Mecistocirrus digitatus and Its Application in Identification of GI Nematode Eggs in Bovine Faeces

“…Gastrointestinal (GI) nematodes of domestic ruminants are of major veterinary importance due to their high prevalence, ubiquitous distribution and the pathological consequences of infection and the associated economic production losses [1,3,18]. In Japan, the major GI nematode species in cattle are Ostertagia ostertagi, Mecistocirrus digitatus and Trichostrongylus axei which are found in the abomasum; Strongyloides papillosus and Cooperia and Nematodirus species which are found in the small intestine; and Oesophagostomum radiatum found in the large intestine [7,15,16,23]. Of these species, M. digitatus, O. ostertagi and Cooperia oncophora are considered the most prevalent in cattle; in particular, the infection rate of M. digitatus was high at approximately 30-50 % [7,16].…”