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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