Reaction of swine to oil-adjuvanted inactivated foot-and-mouth disease virus vaccine inoculated by intramuscular and subcutaneous routes

Abstract

Local reactions at inoculation sites of swine vaccinated with foot-and-mouth disease antigens emulsified with oil adjuvant were examined at 7, 14, 32, 45, 62 and 90 days postinoculation. The serologic data indicate that either the subcutaneous or intramuscular route, as well as the different inoculation sites selected induce a similar antibody response. Lesions at all inoculation sites were characterized by subacute and chronic granulomatous tissue reaction and the continuous presence of oil vacuoles. There is little doubt that some degree of reaction at the site of inoculation is to be expected and thus the site and route are of utmost importance in reducing the possibility of a carcass blemish.