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Journal of Clinical Microbiology, September 2001, p. 3047-3051, Vol. 39, No. 9
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.9.3047-3051.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Rapid and Accurate Identification of
Coagulase-Negative Staphylococci by Real-Time PCR
K. J.
Edwards,1
M. E.
Kaufmann,2 and
N. A.
Saunders1,*
Molecular Biology Unit, Virus Reference
Division,1 and Laboratory of Hospital
Infection,2 Central Public Health
Laboratory, Colindale, London, NW9 5HT, United Kingdom
Received 9 April 2001/Returned for modification 30 May
2001/Accepted 8 July 2001
Biprobe identification assays based on real-time PCR were designed
for 15 species of coagulase-negative staphylococci (CNS). Three sets of
primers and four biprobes were designed from two variable regions of
the 16S rRNA gene. An identification scheme was developed based on the
pattern of melting peaks observed with the four biprobes that had been
tested on 24 type strains. This scheme was then tested on 100 previously identified clinical isolates and 42 blindly tested isolates.
For 125 of the 142 clinical isolates there was a perfect correlation
between the biprobe identification and the result of the ID 32 Staph
phenotypic tests and PCR. For 12 of the other isolates a 300-bp portion
of the 16S rRNA gene was sequenced to determine identity. The remaining
five isolates could not be fully identified. LightCycler real-time PCR
allowed rapid and accurate identification of the important CNS
implicated in infection.
*
Corresponding author. Mailing address: Molecular
Biology Unit, Virus Reference Division, Central Public Health
Laboratory, 61 Colindale Ave., Colindale, London, NW9 5HT, United
Kingdom. Phone: 020 8200 4400, ext. 3070. Fax: 020 8200 1569. E-mail:
nsaunders{at}phls.org.uk.
Journal of Clinical Microbiology, September 2001, p. 3047-3051, Vol. 39, No. 9
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.9.3047-3051.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
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