Isolation of wine influenza virus in Oklahoma.

Three isolations of swine influenca virus were made from 2 swine herds in west-central Oklahoma. Many swine in these herds had signs of respiratory tract disease, and in 1 herd, some affected animals also had diarrhea. Two isolations were made in swine testicle cell line and 1 in embryonating chicken eggs. All 3 strains were cytopathogenic for swine testicle cells.