Korean Journal of Veterinary Research 1980;20(1):53-58.
Antimicrobial Susceptibility of Gram-Negative Bacilli Isolated from Bovine Udder Infections
Cheon Kyu Park
Department of Veterinary Medicine, College of Agriculture, Gyeongbug National University
젖소 유방염유래(乳房炎由來) Gram 음성간균의(陰性桿菌) 약제감수성(藥劑感受性)
박청규
경북대학교 농과대학
Abstract
Antimicrobial susceptibility of 157 Gram-negative bacilli (90 Escherichia coli. 30 Enterobacter aerogenes, 18 Klebsiella pneumoniae, 12 Proteus spp., 3 Pseudomonas aeruginosa and 4 Alcaligenes faecalis) isolated from infected bovine udders was determined by the plate dilution method. Gentamicin and oxolinic acid at a concentration of $12.5{mu}g/ml$ were very active to all of 157 Gram-negative bacilli tested, and 98% of these strains were susceptible to nalidixic acid at a concentration of $25{mu}g/ml$. Most of the 90 Escherichia coli strains were inhibited by chloramphenicol, ampicillin and carbenicillin and carbenicillin at a concentration of $12.5{mu}g/ml$. None of the Klebsiella pneumoniae strains were inhibited at a concentration of $50{mu}g/ml$ of ampicillin and carbenillin, whereas all the species of Proteus resisted a concentration of $50{mu}g/ml$ or higher tetracycline. All the 3 strains of Pseudomonas aeruginosa were highly resistant to streptomycin, kanamycin, Ampicillin, chloramphenicol, tetracycline and nalidixic acid.


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