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Journal of Clinical Microbiology, Jan 1997, 117-120, Vol 35, No. 1
S Nelson, A Matlow, C McDowell, M Roscoe, M Karmali, L Penn and L Dyster
In order to improve detection of Bordetella pertussis in nasopharyngeal
aspirates (NPAs) in our laboratory, a PCR-based assay was optimized, and a
study was designed (i) to compare results obtained by PCR to those obtained
by culture and (ii) to evaluate a novel microtiter plate- based DNA
hybridization assay (PCR-plate) by comparing it to agarose gel
electrophoresis (PCR-gel) for detection of the PCR product. DNA for the PCR
was extracted with a guanidine thiocyanate buffer and used in a PCR mixture
containing primers directed against a reiterated gene sequence in B.
pertussis (Q. He, J. Mertsola, H. Soini, M. Skurnik, O. Ruuskanen, and M.
K. Viljanen, J. Clin, Microbiol. 31:642-645, 1993). Of 96 NPAs submitted
from a targeted study group, 23 were positive by culture, 27 were positive
by PCR-gel, and 31 were positive by PCR- plate. All culture-positive
specimens were also positive by PCR. Of nine patients with
culture-negative-PCR-positive results, six had discharge diagnoses of
pertussis. Thus, PCR with plate-based product detection is a sensitive
method for the laboratory detection of B. pertussis in NPAs. Additional
advantages of the plate assay include rapidity, objectivity in reading
results, specificity, and the capability of being adapted to a high-volume,
automated system.
Copyright © 1997 by the American Society for Microbiology. All rights reserved.
Detection of Bordetella pertussis in clinical specimens by PCR and a microtiter plate-based DNA hybridization assay
Department of Pediatric Laboratory Medicine, Hospital for Sick Children, Toronto, Ontario, Canada. suenelson@mailhub.sickkids.on.ca
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