From April 2008 to January 2009, a total 458 raw milk samples were randomly collected from 15 stock raising farms located in northern area of Kyunggi province and cultured for the presence of Enterococci spp. A total 170 enterococcal isolates were recovered from the raw milk samples. Enterococcus faecalis was predominant species recovered (64.7%), followed by E. faecium (18.8%), E. avium (5.9%), E. gallinarum (5.9%) and E. durans (4.7%). Antimicrobial resistance patterns of 170 Enterococci spp. against ampicillin, erythromycin, tetracyclin, chloramphenicol, vancomycin, ciprofloxacin and streptomycin were tested. According to the result, they showed high level resistance to erythromycin and streptomycin (82,9% and 93,5% respectively), moderately resistance to ampicillin, chloramphenicol and tetracyclin (50%, 45.9% and 32%, respectively) but fortunately, vancomycin and ciprofloxacin are still effective against this species.

2008 년 4 월부터 2009 년 1 월 사이에 경기도 북부 지역 에 위치한 축산 농가 15 곳으로부터 458 개의 원유 시료를 공급받아 장구균속 세균을 분리 동정하였다 . 총 170 개의 장구균속 세균이 분리되었으며 그 중 Enterococcus faecalis 가 가장 우세하게 분리된 균주이며 (64.7%) E. faecium 이 18.8%, E. avium 이 5.9%, E. gallinarium 이 5.9%, E. durans 가 4.7% 의 순으로 분리되었다 . 분리된 170 종의 장구균을 대상으로 ampicillin, erythromycin, tetracyclin, chloramphenicol, vancomycin, ciprofloxacin 및 streptomycin 에 대한 감수성 검사를 실시하였다 . 그 결과 erythromycin (82.9%) 과 streptomycin (93.5%) 에 대해서는 고도의 저항성을 나 타내었으며 ampicillin (50%), chloramphenicol (45.(%) 및 tetracyclin (32%) 에 대해서는 중증도의 저항성을 나타내었 으나 vanocomycin 및 ciprofloxacin 에 대해서는 다행이 감 수성인 결과를 나타내었으며 앞으로도 지속적인 모니터링 이 필요한 것으로 판단된다

• 이혜인(삼육대학교 동물과학부)
• 이상진(삼육대학교)
• 최성숙(삼육대학교) Correspondence