Aucte Bacillus cereus mastitis in dairy cattle associated with use of a contaminated antibiotic.

SCHIEFER et al (5) list various reports of Bacillus cereus as the cause of acute gangrenous mastitis. The mode of infection was by introduction of the organism either through antibiotic treatment, surgery or teat injuries. Jasper et al (4) reported the occurrence of 20 cases of mastitis associated with antibiotic treatment during the dry period. This report describes the clinical observations and bacteriological findings in cases of mastitis caused by Bacillus cereus in which the antibiotic was used primarily during lactation.