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Journal of Clinical Microbiology, December 2004, p. 5881-5884, Vol. 42, No. 12
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.12.5881-5884.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Clinical Isolates of Staphylococcus intermedius Masquerading as Methicillin-Resistant Staphylococcus aureus

Sudha Pottumarthy,1 Jeffrey M. Schapiro,1 Jennifer L. Prentice,1 Yolanda B. Houze,1 Susan R. Swanzy,1 Ferric C. Fang,1,2 and Brad T. Cookson1,2*

Departments of Laboratory Medicine,1 Microbiology, University of Washington, Seattle, Washington2

Received 6 May 2004/ Returned for modification 11 June 2004/ Accepted 23 August 2004

Staphylococcus intermedius is a zoonotic organism that can be associated with human disease. We report two separate cases of S. intermedius infection in which a false-positive rapid penicillin binding protein 2a latex test in conjunction with the phenotypic properties of ß-hemolysis and coagulase positivity allowed the clinical isolates to masquerade as methicillin-resistant Staphylococcus aureus. 16S rRNA gene sequencing and the absence of mecA revealed the strains to be methicillin-susceptible S. intermedius.

* Corresponding author. Mailing address: University of Washington, 1959 NE Pacific St., Box 357110, Seattle, WA 98195. Phone: (206) 598-6131. Fax: (206) 598-6189. E-mail: cookson{at}u.washington.edu.

Journal of Clinical Microbiology, December 2004, p. 5881-5884, Vol. 42, No. 12
0095-1137/04/$08.00+0     DOI: 10.1128/JCM.42.12.5881-5884.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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