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Journal of Clinical Microbiology, September 1999, p. 2789-2792, Vol. 37, No. 9
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Rapid Slide Latex Agglutination Test for Detection of Methicillin Resistance in Staphylococcus aureus

Arjanne van Griethuysen,1,* Miranda Pouw,2 Nan van Leeuwen,2 Max Heck,2 Piet Willemse,3 Anton Buiting,1 and Jan Kluytmans3

Department of Clinical Microbiology, St. Elisabeth Hospital, Tilburg,1 National Institute of Public Health and Environmental Protection, Bilthoven,2 and Department of Clinical Microbiology, St. Ignatius Hospital, Breda,3 The Netherlands

Received 8 March 1999/Returned for modification 13 April 1999/Accepted 20 May 1999

The MRSA screen test (Denka Seiken Co., Ltd.), a commercially available, rapid (20-min) slide latex agglutination test for the determination of methicillin resistance by detection of PBP 2a in Staphylococcus aureus, was compared with the oxacillin agar screen test and PCR detection of the mecA gene. A total of 563 S. aureus isolates were tested. Two hundred ninety-six of the isolates were methicillin-susceptible isolates from cultures of blood from consecutive patients. Also, 267 methicillin-resistant isolates that comprised 248 different phage types were tested. Methicillin resistance was defined as the presence of the mecA gene. Of the 267 mecA gene-positive isolates, 263 were positive by the MRSA screen test (sensitivity, 98.5%), and all the mecA-gene negative strains were negative by the MRSA screen test (specificity, 100%). The oxacillin agar screen test detected methicillin resistance in 250 of the mecA gene-positive isolates (sensitivity, 93.6%). The sensitivity of the MRSA screen test was statistically significantly higher than the sensitivity of the oxacillin agar screen test (P < 0.05). The MRSA screen test is a highly sensitive and specific test for the detection of methicillin resistance. Also, it offers results within half an hour and is easy to perform, which makes this test a valuable tool in the ongoing battle against methicillin-resistant S. aureus.


* Corresponding author. Mailing address: Department of Clinical Microbiology, St. Elisabeth Hospital, P.O. Box 747, 5000 AS Tilburg, The Netherlands. Phone: (31) 13-5392650. Fax: (31) 13-5441264. E-mail: a.vgriethuysen{at}worldonline.nl.


Journal of Clinical Microbiology, September 1999, p. 2789-2792, Vol. 37, No. 9
0095-1137/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.



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