Susceptibility of the Domestic Pig to Influenza B Virus

Abstract

EARLY in 1966 we demonstrated antibodies to influenza B virus in stocks of swine which had been affected by an influenza-like disease late in 1965, during, or immediately after, an influenza B epidemic¹. Piglets were inoculated intranasally with an early egg passage of an influenza B strain isolated from the 1965 epidemic. An inoculated piglet developed specific antibodies, a contact piglet gave an equivocal response. In the more extensive study reported here, experimental conditions were carefully controlled to give unequivocal results.