The efficacy of strategic treatments with ivermectin pour-on against trichostrongylid and lungworm infections in first year grazing calves in northern Germany.
Three groups of 8 first year grazing calves each were either left untreated as controls (group 1), or were treated with 10 mg levamisole spot-on/kg bodyweight (group 2) or with 0.5 mg ivermectin pour-on/kg bodyweight 3, 8, and 13 weeks after turnout (group 3), respectively. Egg counts, herbage larval counts, worm counts of tracer calves, pepsinogen concentrations and weight gains showed a high efficacy of the strategic treatment in group 3 against gastrointestinal nematodes. The calves of group 1 and 2 developed clinical signs of parasitic bronchitis whereas the group 3 animals remained clinically healthy. The strategic treatment with ivermectin cleaned the respective pasture from infective lungworm larvae.
Schnieder
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Institute of Parasitology, School of Veterinary Medicine, Hannover, Federal Republic of Germany.
Wheeler
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S
D000018:Abomasum / Q000469:parasitology; D000287:Administration, Topical; D000818:Animals; D001835:Body Weight; D002417:Cattle; D002418:Cattle Diseases / Q000188:drug therapy*; D004021:Dictyocaulus / Q000302:isolation & purification; D004022:Dictyocaulus Infections / Q000188:drug therapy*; D005243:Feces / Q000469:parasitology; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000188:drug therapy / Q000662:veterinary*; D007421:Intestine, Small / Q000469:parasitology; D007559:Ivermectin / Q000008:administration & dosage / Q000627:therapeutic use*; D007814:Larva / Q000302:isolation & purification; D008168:Lung / Q000469:parasitology; D010270:Parasite Egg Count / Q000662:veterinary; D010435:Pepsinogens / Q000097:blood; D014251:Trichostrongyloidea / Q000302:isolation & purification; D014252:Trichostrongyloidiasis / Q000188:drug therapy / Q000662:veterinary*
D010435:Pepsinogens; D007559:Ivermectin