infection of roe-deer in france by the lung nematode, dictyocaulus eckerti skrjabin, 1931 (trichostrongyloidea): influence of environmental factors and host density.the prevalence of the lungworm, dictyocaulus eckerti, was studied in a sample of 603 roe-deer (capreolus capreolus) in the rhone district of france. the mean prevalence of infection (17%) in deer in a given area fluctuated according to the percentage of the area covered with forest, or lake and river. the density of roe-deer or domestic ruminants, the type of forest and the maximum elevation of the site were not related to the prevalence of infection.19872950246
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