메티실린 내성 황색포도알균(Methicillin Resistant Staphylococcus aureus, MRSA)의 분자역학 연구에서 IRS-PCR (Infrequent- Restriction-Site PCR)의 응용 (Application of Infrequent-Restriction-Site Polymerase Reaction (IRS-PCR) to the Molecular Epidemiologic Analysis of Methicillin Resistant Staphylococcus aureus (MRSA))

서지정보

· 발행기관 : 대한감염학회
· 수록지 정보 : Infection and Chemotherapy / 43권 / 5호 / 396 ~ 405페이지
· 저자명 : 신나영, 유진홍, 박철민, 이동건, 최수미, 권재철, 김시현, 박선희, 최정현

초록

Background: We investigated the usefulness of infrequent-restriction-site polymerase chain reaction (IRS-PCR) compared with pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) on the molecular epidemiologic analysis of methicillin-resistant Staphylococcus aureus (MRSA).
Materials and Methods: We used fifty clinical isolates of MRSA collected from 10 university hospitals located in Seoul. We performed three procedures on these isolates: PFGE using Sma I, IRS-PCR using XbaI-Hha I or Eag I-Hha I, and MLST using seven house-keeping genes. We determined the clusters of molecular types by dendrogram using the unweighted pair group method with arithmetic mean (UPGMA) and Dice coefficients Results: MLST analysis showed that isolates exhibited ST1, ST5, ST72, ST89, and ST239. In PFGE, the isolates clustered into 5 major groups with 80% similarity,which subsequently became classified into 18 subgroups with 95% similarity. In IRS-PCR using EagI-HhaI restriction enzymes, there was little resolution among the patterns of isolates. However, Xba I-Hha I IRS-PCR showed 5 groups with a 90%similarity. These groups were then classified into 9 subgroups with a 95% similarity.
There were no significant differences among the isolates from different hospitals.
Conclusions: The XbaI-Hha I IRS-PCR method could be a useful tool in the molecular epidemiology of MRSA. Its resolution power was good enough to analyze isolates, because the patterns of IRS-PCR were closely correlated with those of MLST and showed diverse groups.

영어초록

Background: We investigated the usefulness of infrequent-restriction-site polymerase chain reaction (IRS-PCR) compared with pulsed-field gel electrophoresis (PFGE) and multilocus sequence typing (MLST) on the molecular epidemiologic analysis of methicillin-resistant Staphylococcus aureus (MRSA).
Materials and Methods: We used fifty clinical isolates of MRSA collected from 10 university hospitals located in Seoul. We performed three procedures on these isolates: PFGE using Sma I, IRS-PCR using XbaI-Hha I or Eag I-Hha I, and MLST using seven house-keeping genes. We determined the clusters of molecular types by dendrogram using the unweighted pair group method with arithmetic mean (UPGMA) and Dice coefficients Results: MLST analysis showed that isolates exhibited ST1, ST5, ST72, ST89, and ST239. In PFGE, the isolates clustered into 5 major groups with 80% similarity,which subsequently became classified into 18 subgroups with 95% similarity. In IRS-PCR using EagI-HhaI restriction enzymes, there was little resolution among the patterns of isolates. However, Xba I-Hha I IRS-PCR showed 5 groups with a 90%similarity. These groups were then classified into 9 subgroups with a 95% similarity.
There were no significant differences among the isolates from different hospitals.
Conclusions: The XbaI-Hha I IRS-PCR method could be a useful tool in the molecular epidemiology of MRSA. Its resolution power was good enough to analyze isolates, because the patterns of IRS-PCR were closely correlated with those of MLST and showed diverse groups.

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