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The influence of different types of chemoprophylaxis on the resistance of first season grazing calves against natural reinfection with Ostertagia ostertagi and Cooperia oncophora in the second grazing season was investigated. A total of 30 helminth-naive crossbred calves were randomly divided into...

Claerebout, E.; Dorny, P.; Vercruysse, J.; Agneessens, J.; Demeulenaere, D.
Veterinary Parasitology, 1998, 76, 4, pp 287-303

The persistent efficacies of doramectin and ivermectin injectable against moderate and high infection levels of Ostertagia ostertagi and Cooperia oncophora were evaluated in cattle. Calves were allocated to 6 groups of 6 animals. On Day 0 animals of Groups I1/I2 and D1/D2 were treated with 0.2...

Vercruysse, J.; Dorny, P.; Claerebout, E.; Demeulenaere, D.; Smets, K.; Agneessens, J.
Veterinary Parasitology, 2000, 89, 1/2, pp 63-69