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Epidemiological and Genetic Characterization of Methicillin-Resistant Staphylococcus aureus Isolates from the Ear Discharge of Outpatients with Chronic Otitis Media

Authors
Yang, Jin AhKim, Jeong YeonYoon, Young KyungKim, SungbumPark, Dae WonSohn, Jang WookSim, Hee SunKim, Min Ja
Issue Date
10월-2008
Publisher
KOREAN ACAD MEDICAL SCIENCES
Keywords
Methicillin Resistance; Staphylococcus aureus; Otolaryngology; Epidemiology; Genotype
Citation
JOURNAL OF KOREAN MEDICAL SCIENCE, v.23, no.5, pp.762 - 766
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF KOREAN MEDICAL SCIENCE
Volume
23
Number
5
Start Page
762
End Page
766
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/122620
DOI
10.3346/jkms.2008.23.5.762
ISSN
1011-8934
Abstract
The origin of methicillin-resistant Staphylococcus aureus (MRSA) strains from otolaryngology outpatients has not been evaluated yet in Korea. We analyzed epidemiologic and genetic characteristics of MRSA isolates from the ear discharge of 64 outpatients with chronic otitis media in a Korean University Hospital during 2004. MRSA strains were grouped as either from the initial visit (n=33) or the follow-up visit (n=31) based on the timing of isolation. Healthcare-associated risk factors were frequently present among patients of the initial visit group, especially prior visit to primary clinic (79%) and antibiotic use (73%). SCCmec typing and multilocus sequence typing results showed that two genotypes, ST5-MRSA-II and ST239-MRSA-III,were prevalent in both the initial visit (73% vs. 24%) and the follow-up visit (55% vs. 42%). Pulsed-field gel electrophoresis identified eight types, including two major types shared by both groups. We conclude that majority of MRSA strains from ear discharge of chronic otitis media belonged to nosocomial clones that might be circulating in the community. This is the first report of the genetic analysis of MRSA strains from otolaryngology practices in Korea.
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