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Journal of Clinical Microbiology, 12 1997, 3210-3214, Vol 35, No. 12
KL Suchland, JM Counts and WE Stamm
The last decade has witnessed the development of a wide variety of
diagnostic tests for Chlamydia trachomatis. In order to determine what
laboratory methods are being used to detect C. trachomatis infections in
Washington State and to identify factors influencing test selection,
between April 1995 and October 1995 we conducted a mailed questionnaire
survey of all 112 laboratories certified to do chlamydia testing. Of these,
20 had discontinued testing for C. trachomatis, and responses were obtained
from 89 (97%) of the remaining 92 laboratories. Surprisingly, 38 (43%) of
the 89 laboratories used rapid tests such as Clearview and Surecell, making
such tests the most commonly used laboratory tests. Laboratories which used
rapid tests had lower test volumes, less experience performing tests for C.
trachomatis, less frequent attendance at professional meetings, and greater
reliance on manufacturers for information compared with laboratories which
used other methods. Confirmation of non-culture-positive results was
provided by 28 (34%) of the 82 laboratories doing non-culture-based tests.
Forty-one (47%) of 88 laboratories reported having compared their method
with another method. Test volume was the strongest predictor of
laboratories which confirmed positive non-culture-based test results and
which had performed a laboratory comparison of methods. We conclude that
rapid tests for C. trachomatis are often being used inappropriately and
that efforts are needed to improve effective implementation and quality
assurance of laboratory testing for C. trachomatis.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Laboratory methods for detection of Chlamydia trachomatis: survey of laboratories in Washington State [In Process Citation]
Department of Medicine, University of Washington, Seattle 98195, USA. katesuch@u.washington.edu
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