Reovirus-like particles were demonstrated by negative stain electron microscopic examination of the feces from antelope fawns with diarrhea. Fluorescent antibody tests on frozen sections of ileum from one dead antelope fawn and immunoelectron microscopy tests on feces from two live fawns provided evidence that the antelope agent was serologically related to the neonatal calf diarrhea reovirus-like agent.
