Gram-Negative Bacilli Isolated from Bovine Udder Infections

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

  • Park, Cheong Kyu (Department of Veterinary Medicine, College of Agriculture, Gyeongbug National University)
  • 박청규 (경북대학교 농과대학 수의학과)
  • Published : 1979.09.30


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.