Journal Article

Epidemiological Typing of Community-Acquired Methicillin-Resistant <i>Staphylococcus aureus</i> Isolates from Children in Taiwan

Chih-Chien Wang, Wen-Tsung Lo, Mong-Ling Chu and L. K. Siu

in Clinical Infectious Diseases

Published on behalf of Infectious Diseases Society of America

Volume 39, issue 4, pages 481-487
Published in print August 2004 | ISSN: 1058-4838
Published online August 2004 | e-ISSN: 1537-6591 | DOI: http://dx.doi.org/10.1086/422642
Epidemiological Typing of Community-Acquired Methicillin-Resistant Staphylococcus aureus Isolates from Children in Taiwan

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Background. A 1400-bed tertiary medical center in northern Taiwan was used to conduct an epidemiological study of children hospitalized with community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) infection during a 5-year period.

Methods. Nineteen previously healthy children with predominantly skin and soft-tissue CA-MRSA infections were enrolled into the study. Seventeen CA-MRSA isolates were examined for antimicrobial susceptibility and molecular typing.

Results. A comparison of our results with the reported resistance rates among CA-MRSA isolates from other countries showed uniformly high macrolide resistance (100%). Of the 17 MRSA isolates in our study, all had the macrolide-lincosamide-streptogramin—constitutive phenotype and the ermB gene. Moreover, on the basis of molecular typing results, 11 (65%) of 17 CA-MRSA isolates were genetically related (as determined by pulsed-field gel electrophoresis), and multilocus sequence typing revealed a sequence type of 59 in all isolates. Staphylococcal toxin genes lukS-PV and lukF-PV were detected in all isolates. However, staphylococcal cassette chromosome mec type IV was only detected in 3 (17.6%) of 17 isolates; the remaining 14 isolates were untypeable.

Conclusions. Analysis of our data suggests the predominance of a single endemic CA-MRSA strain with high macrolide resistance in our community. Clinical improvement with incision and drainage was noted for most patients, despite treatment with an ineffective antibiotic, so the need for a change in treatment guidelines should be addressed.

Journal Article.  4054 words.  Illustrated.

Subjects: Infectious Diseases ; Immunology ; Public Health and Epidemiology ; Microbiology

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