Changes in Coagulase Serotype of Staphylococcus aureus Isolates in Busan, 1994-2005

부산지역에서 분리된 Staphylococcus aureus의 Coagulase 혈청형 변화

  • Hwang, Soo-Myung (Department of Clinical Laboratory Science, Catholic University of Pusan) ;
  • Kim, Tae-Un (Department of Clinical Laboratory Science, Catholic University of Pusan)
  • 황수명 (부산가톨릭대학교 보건과학대학 임상병리학과) ;
  • 김태운 (부산가톨릭대학교 보건과학대학 임상병리학과)
  • Published : 2007.12.30

Abstract

We analyzed the phenotypic changes in coagulase serotype of S. aureus isolated from clinical sources and nasal cavities of healthy persons, $1994{\sim}2005$. A total of 715 isolates, 408 methicillin resistant S. aureus (MRSA) from clinical sources and 307 methicillin-susceptible S. aureus (MSSA), were classified into eight coagulase sero-types, I to VIII. The most prevalent serotype in MRSA was type II (54.3%, 222/408) and followed IV (24.7%), III (10.9%), and V (5.2%), whereas the majorities in MSSA were type VII (30.9%, 95/307), IV (22.2%), V (22.2%) and II (7.1%). Among the isolates collected periods, significant changes of coagulase serotypes in both strains were observed. In MRSA strains, the serotype V was not detected until 1997, but rapidly increased to 18.5% (20/108) in 2005, and the serotypes III decreased from 27% (31/115) in 1994 to 0.9% (1/108) in 2005. A similar trend in MSSA strains was observed but serotype II strain was not detected in 2005. The antigenic shift and changes in the coagulase of S. aureus were confirmed.

1994년에서 2005년 사이 부산지역의 임상검체와 건강인의 비강에서 분리된 Staphylococcus aureus의 coagulase 혈청형의 변화를 조사하였다. 총 715균주에서 methicillin 내성 S. aureus (MRSA)는 임상균주로 408주였으며, 나머지 307주는 methicillin 감수성(MSSA) 균주로서, 8종(I-VIII)의 coagulase 혈청형이 분리되었다. MRSA 균주에서 가장 분리율이 높은 coagulase 혈청형은 II형(54.3%, 222/408)이었으며, 다음으로 IV형(24.7%), III형(10.9%), V형(5.2%)순으로 나타났으며, MSSA 균주에서는 VII형(30.9%, 95/307), IV형(22.2%), V형(22.2%), II형(7.1%)의 순으로, 균주간에 큰 차이를 나타내었다. 분석 연도별 coagulase 혈청형을 비교한 결과 큰 변화가 관찰되었다. MRSA 균주에서 혈청형 V형은 1997년까지 분리되지 않았으나, 2005년에는 18.5% (20/108)로 증가되었고, III형은 1994년 27.0% (31/115)에서 2005년 0.9% (1/108)로 감소되었다. 또한 MSSA 균주에서도 유사한 경향을 나타내었으나, II형의 경우 2005년도 균주에서는 분리되지 않았다. 이와 같은 결과에서 S. aureus의 coagulase 항원성 전이에 따른 혈청형의 변화를 확인하였다.

Keywords

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