Production responses to internal parasite control in dairy cattle.
A significant increase in milk production, averaging 164 litres per cow per lactation (a 4.8% increase), was seen after cows infected with gastrointestinal nematodes, paramphistomes and Fasciola hepatica were treated with broad-spectrum anthelmintics. Three hundred and ninety pairs of cows from eight herds with year-round calving were studied. One cow in each matched pair was given 7.5 mg/kg fenbendazole, 7.5 mg/kg levamisole hydrochloride and 15 mg/kg oxyclozanide in March, May and August of one year; the other cow in the pair received no anthelmintic. The number of nematode and trematode eggs was significantly decreased in the faeces of treated cows.
Spence
S A
SA
Wollongbar Agricultural Institute, New South Wales.
Fraser
G C
GC
Dettmann
E B
EB
Battese
D F
DF
D000818:Animals; D000871:Anthelmintics / Q000627:therapeutic use*; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy* / Q000503:physiopathology; D005211:Fascioliasis / Q000188:drug therapy / Q000662:veterinary; D005243:Feces / Q000469:parasitology; D005260:Female; D005273:Fenbendazole / Q000627:therapeutic use; D006373:Helminthiasis / Q000188:drug therapy / Q000503:physiopathology; D006374:Helminthiasis, Animal; D007411:Intestinal Diseases, Parasitic / Q000188:drug therapy / Q000503:physiopathology / Q000662:veterinary*; D007774:Lactation; D007978:Levamisole / Q000627:therapeutic use; D009349:Nematode Infections / Q000188:drug therapy / Q000503:physiopathology / Q000662:veterinary; D010097:Oxyclozanide / Q000627:therapeutic use; D010250:Paramphistomatidae; D010270:Parasite Egg Count / Q000662:veterinary; D014201:Trematode Infections / Q000188:drug therapy / Q000503:physiopathology / Q000662:veterinary
D000871:Anthelmintics; D010097:Oxyclozanide; D007978:Levamisole; D005273:Fenbendazole