| incidence of antibody for hemagglutinating encephalomyelitis virus in serums from swine in the united states. | serums prepared from blood collected from swine in arizona, florida, georgia, hawaii, iowa, maine, new hampshire, oregon, vermont, and washington were examined by the hemagglutination-inhibition (hi) test for antibody to hemagglutinating encephalomyelitis virus (hev). antibody was detected in serums from swine in each of the states except maine, new hampshire, and vermont. the frequency of antibody ranged from 10.9% (6 of 55) with serums from swine in oregon, to 98.6% (71 of 72) with serums from ... | 1975 | 807134 |