The incidence of Haemonchus contortus infections in sheep abomasa received at animal health laboratories in New Zealand

Abstract
Extract The role of mixed trichostrongyle infections as a cause of mortality, reduced live-weight gain and poor wool production in sheep in New Zealand has been clearly demonstrated by Brunsdon ( 1963a Anon. Specimens for Laboratory Examination N.Z. Dept. Agric. 1965 48 48 [Google Scholar] , 1964a Brunsdon, R. V. 1963a. The effect of infestation by nematodes of the family Trichostrongylidae upon the liveweight gain and wool production of young sheep. N.Z. vet. J., 11: 144–148. [Taylor & Francis Online] [Google Scholar] , 1966 Brunsdon, R. V. 1963b. The seasonal availability to grazing sheep of infective trichostrongyle larvae on pasture. N.Z. vet. J., 11: 86–89. [Taylor & Francis Online] [Google Scholar] ).