The isolation of leptospira serotypes copenhageni and ballum from healthy calves

Abstract

Extract

Bovine Leptospirosis was first recognized in New Zealand in 1950 (Anon., 1951). Since then the infection has become widespread, particularly during wet spring and summer months (Anon., 1973). In calves, infection with serotype pomona frequently gives rise to haemoglobinuria and general malaise, while symptoms such as loss of condition and pendulous abdomens which appear suddenly and are followed by sudden death have been associated with copenhageni infections (Dodd and Brackenridge, 1960).