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The epidemiology of Ostertagia ostertagi as primarily defined in weaner-yearling cattle in the USA and other parts of the world are reviewed and some of the factors which operate in population changes of the parasite through different age classes are considered under the headings: epidemiology in...

Williams, J. C.; Knox, J. W.; Loyacano, A. F.
Veterinary Parasitology, 1993, 46, 1-4, pp 313-324