| climate and the distribution of intestinal trichostrongylus spp. of sheep. | the relative prevalences of trichostrongylus vitrinus, t. colubriformis and t. rugatus in sheep in south-west western australia were examined for evidence of associations with climatic conditions in different localities. the region has a mediterranean-type climate with hot, dry summers and cool, wet winters. the intestinal trichostrongylus spp. populations in sheep sampled comprised 50% t. vitrinus, 38% t. colubriformis and 12% t. rugatus. the prevalence of t. vitrinus was negatively correlated ... | 1988 | 3347988 |