Titres After Leptospiral Vaccines

Abstract

Extract

Sir, — It appears that Drs Marshall et al.⁽¹⁾ have missed the cardinal point of our paper on an unusual serological response in calves after use of a leptospiral vaccine. ⁽²⁾ That point, of course, was that after use of one leptospiral vaccine, but not another, post-vaccination microscopic agglutination titres of calves were indistinguishable from post-infection titres, whatever the actual titres may have been.