Trichostronglye worm infection in cattle: Further studies on problems of diagnosis and on seasonal patterns of occurrence

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Abstract
Extract The results of recent New Zealand studies (Brunsdon, 1968 Brunsdon, R. V. 1968. Trichostrongyle worm infection in cattle: ostertagiasis — effect of a field outbreak on production, with a review of the disease syndromes, problems of diagnosis and treatment. N.Z.vet.J., 16: 176–187. [Taylor & Francis Online] [Google Scholar] , 1969 Brunsdon, R. V. 1969. Trichostrongyle worm infection in cattle: ostertagiasis and concurrent infections in dairycalves: seasonal patterns of occurrence, pathology and diagnosis. N.Z. vet. J., 17: 161–172. [Taylor & Francis Online] [Google Scholar] ) have indicated the potential pathogenicity of trichostrongyle worm infection in calves reared on pasture underdairy-type management and have confirmed overseas findings regarding difficulties associated with- the- diagnosis of trichostrongyle disease in general and of the various syndromes of ostertagiasis in particular (Anderson et al., 1965 Anderson, N. , Armour, J. , Jarrett, W. F. H. , Jennings, F. W. , Ritchie, J. S. D. and Urquhart, G. M. 1965. A field study of parasitic gastritis in cattle. Vet. Rec., 77: 1,196–1,204. [Google Scholar] ; Michel, 1968 Michel, J. F. 1968. Faecal egg counts in infections of gastro-intestinal nematodes in cows. Vet. Rec, 82: 132–133. [Web of Science ®] [Google Scholar] ).