Leukocyte migration-inhibition procedure for transmissible gastroenteritis viral antigens

Swine exposed to transmissible gastroenteritis viral antigens developed humoral and cell-mediated immunity. Migration of leukocytes from exposed swine was inhibited in the presence of the sensitizing antigens, whereas migration of leukocytes from nonexposed swine was not inhibited in the presense of these same antigens. In virus-neutralization-positive animals, it was not possible to correlate degree of inhibition with virus-neutralization titer. Inhibition was observed 7 days after exposure and was found to persist for at least 35 days.