| giardia in beaver (castor canadensis) and nutria (myocastor coypus) from east texas. | we examined the prevalence of giardia sp. infection in nuisance beaver (castor canadensis) and nutria (myocastor coypus) in east texas. from october 1992 through september 1993, 100 beaver and 30 nutria were collected in routine wildlife management activities conducted by the u.s. department of agriculture-animal and plant health inspection service-texas animal damage control service. fecal and duodenal mucoid samples were preserved from each animal. fecal samples were examined for the occurrenc ... | 2002 | 12537124 |