Bovine Septicemia with Vegetative Endocarditis Caused by Pasteurella multocida A:1

Abstract

A 35-day-old calf on a dairy farm in Hiroshima Prefecture died after showing respiratory disorder and swelling of joints. A bacteriological and histopathological examination revealed systemic infection and vegetative endocarditis caused by Pasteurella multocida A:1 (Carter's capsular type A : Heddleston's somatic type 1), showing atypical biochemical characteristics, i.e., positive acid production from lactose and positive hydration of o-nitrophenyl-β-D-galactocpyranoside. This is the first report of bovine septicemia caused by P. multocida A:1.