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A study was carried out to evaluate the effect of different infection levels of Ostertagia ostertagi and Cooperia oncophora in a simulated 'first grazing season' on the resistance of calves to an artificial challenge infection. The infection levels were determined by the infection schedules and the ...

Claerebout, E.; Vercruysse, J.; Dorny, P.; Demeulenaere, D.; Dereu, A.
Veterinary Parasitology, 1998, 75, 2/3, pp 153-167