지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 대한수의학회 Korean Journal of Veterinary Research(대한수의학회지) Korean Journal of Veterinary Research(구 대한수의학회지) 제47권 제1호
- 발행연도
- 2007.3
- 수록면
- 67 - 75 (9page)
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Environmental mastitis has increased particularly in well-managed or low somatic cell count herds that have successfully controlled contagious pathogens. Major pathogens of environmental mastitis are Escherichia coli (E. coli) and Streptococcus uberis. The present study was conducted to investigate the isolation and antibiotic susceptibility of 406 (21.8%) gram-negative bacteria isolated mastitis milk from 1,865 quaters of 241 Korean dairy farms from 2001 to 2004. Prevalence of major gram-negative bacteria isolated from mastitis milk were E. coli (22.7%) and Enterobacter spp. (16.3%) in coliforms and Pseudomoas spp. (10.3%) and Serratia spp. (7.9%) in non-coliforms. The results on antibiotic susceptibility by agar diffusion test against these pathogens were 86.7% in piperaciliin, 94.6% in cefepime, 85.5% in amikacin, 87.7% in gentamicin and so on. In contrast, the susceptibility against ampicillin (41.9%), cephalothin (9.9%), streptomycin (39.9%) and tetracycline (46.7%) appeared to be below 50%. Gram-negative bacteria showed the high minimal inhibitory concentration on cephalothin (96.1%), streptomycin (99.5%) and tetracycline (96.8%). According to year, distribution of high 256~64 μg/ml on cephalothin get increased, but the others are different. These findings demonstrate that major gram-negative bacteria were E. coli and Enterobacter spp. isolates, and often encountered the diverse antibiotic resistant patterns.
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