Gram-Negative Bacilli Isolated from Bovine Udder Infections

Park, Cheong Kyu

Korean Journal of Veterinary Research 1979;19(2):131-134.

Cheong Kyu Park

Department of Veterinary Medicine, College of Agriculture, Gyeongbug National University

젖소 유방감염증(乳房感染症)으로부터 분리(分離)한 Gram 음성간균(陰性桿菌)

박청규

경북대학교 농과대학 수의학과

Abstract

In order to know the main causative agent and distribution of the agents in Gram-negative bacillus infections of bovine udders, one hundred and forty-eight cultures of Gram-negative bacilli isolated from clinical cases of mastitis during lactation over a period of 2 years in 6 herds of 180 Holstein cows were studied. Escherichia coli occupied 54.7% of the isolates was the most frequently isolated Gram-negative bacillus. 30 of the isolates (20.3%) were Enterobacter aerogenes, but Enterobacter cloacae was not isolated. Remaining isolates were Klebsiella pneumoniae, Proteus spp., Preudomonas aeruginosa and Alcaligenes faecalis. Most of the isolates (75.0%) were isolated from rear quarters.