Further Studies on the Efficacy of Fowl-Pox Vaccines

Abstract

Summary The laboratory and field experiments reported in this paper warrant the following conclusions :- (1) Fowl-pox vaccine applied by the stick method on the wing to flocks two to three months old, of early batch, results in few secondary lesions and confers a durable immunity. (2) It is not advisable to use this vaccine in late hatched birds because these birds suffer from severe post-vaccination reactions. It is suggested tentatively that late hatches bf! first vaccinated with pigeon-pox vaccine and two months later with fowl-pox.