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Journal of Clinical Microbiology, 01 1996, 49-54, Vol 34, No. 1
KA Orle, CA Gates, DH Martin, BA Body and JB Weiss
A multiplex PCR (M-PCR) assay with colorimetric detection was devised for
the simultaneous amplification of DNA targets from Haemophilus ducreyi,
Treponema pallidum, and herpes simplex virus (HSV) types 1 and 2. By using
target-specific oligonucleotides in a microwell format, 298 genital ulcer
swab specimens collected in New Orleans during three intervals from 1992
through 1994 were evaluated. The results of the M- PCR assay were compared
with the results of dark-field microscopy and H. ducreyi culture on two
different culture media. HSV culture results were available for 99
specimens collected during the third interval. Confirmatory PCR assays
targeting different gene sequences for each of the three organisms were
used to validate the M-PCR results. Specimens were resolved as positive for
the determination of sensitivity if the reference diagnostic test was
positive or if the results of both the M- PCR and the confirmatory PCR were
positive. The resolved sensitivities of M-PCR for HSV, H. ducreyi, and T.
pallidum were 100, 98.4, and 91%, respectively. The resolved sensitivities
of HSV culture, H. ducreyi culture, and dark-field microscopy were 71.8,
74.2, and 81%, respectively. These results indicate that the M-PCR assay is
more sensitive than standard diagnostic tests for the detection of HSV, H.
ducreyi, and T. pallidum from genital ulcers.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Simultaneous PCR detection of Haemophilus ducreyi, Treponema pallidum, and herpes simplex virus types 1 and 2 from genital ulcers
Roche Molecular Systems, Alameda, California 94501, USA. karina.orle@roche.com
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