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  • Title: Molecular Epidemiology of Staphylococcus aureus in Skin and Soft Tissue Infections and Bone and Joint Infections in Korean Children.
    Author: Park SG, Lee HS, Park JY, Lee H.
    Journal: J Korean Med Sci; 2019 Dec 23; 34(49):e315. PubMed ID: 31858755.
    Abstract:
    BACKGROUND: Community acquired-methicillin resistant Staphylococcus aureus (MRSA) clones, including ST1, ST8, and ST30 are reported worldwide. However, data among Korean children are limited. Thus, we investigated the molecular characteristics of S. aureus among children in Korea. METHODS: S. aureus isolated from Korean children diagnosed with skin and soft tissue infection (SSTI) or bone and joint infection due to S. aureus infection at Seoul National University Bundang Hospital, from August 2010 to November 2016, were analyzed for multilocus sequence type (ST) and SCCmec typing. Polymerase chain reaction of Panton-Valentine leukocidin (PVL), qac A/B, smr and mupA genes were also performed. Electronic medical records were reviewed for clinical data and antibiotic susceptibility results. Cases were classified into three groups: health care-associated community-onset (HACO) infections, hospital-onset (HO) infections, and community-acquired (CA) infections. RESULTS: A total of 67 strains from children with SSTI (41/67, 61.2%) and bone and joint infection (26/67, 38.8%) were included. Among all isolates, 29.9% (20/67) were MRSA, and 70% (14/20) were classified as CA, 20% (4/20) as HACO and 10% (2/20) as HO infections. MRSA rate according to disease was 34.1% (14/41) for SSTI and 23.1% (6/26) for bone and joint infection. MRSA strains included ST72-SCCmec IV (14/20, 70.0%), ST5-SCCmec II (3/20, 15.0%) and ST1-SCCmec IV (2/20, 10.0%). ST30 was the most common cause of SSTI and bone and joint infections and 96.6% (28/29) were methicillin-susceptible Staphylococcus aureus (MSSA). PVL genes were detected in 3 strains (3.8%, ST30-SCCmec IV n = 1, MSSA ST30 n = 2), qac A/B in 3 (MRSA = 3), smr in 3 (MSSA = 1, MRSA = 2) and mupA in 7 (MRSA = 5, MSSA = 2). CONCLUSION: Molecular epidemiology of S. aureus in Korean children with SSTI and bone and joint infection showed that ST30 was predominant and mostly MSSA. Among MRSA, ST72-SCCmec type IV was the most common strain.
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