Three virus strains were isolated in DK cell cultures inoculated with
fecal specimens of dogs manifesting diarrhea. The isolates were identi
fied as reoviruses on the basis of their biological and physico- chemi
cal properities. They possessed reovirus type 3 antigenic specificity
revealed by hemagglutination-inhibition and neutrarization tests with
the reovirus prototype strains. It was suspected that the isolates wer
e participated in this diarrheic cases.