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Journal of Clinical Microbiology, December 2001, p. 4233-4240, Vol. 39, No. 12
Department of Microbiology, Soochow
University, Taipei, Taiwan 111, Republic of China
Received 20 June 2001/Returned for modification 26 August
2001/Accepted 8 September 2001
Vibrio parahaemolyticus is a
halophilic bacterium frequently involved in human outbreaks of
seafood-associated gastroenteritis. For epidemiological purposes,
different molecular typing methods, such as pulsed-field gel
electrophoresis (PFGE) or ribotyping, have been developed for this
pathogen; however, these methods are mostly labor-intensive and
time-consuming. In this work, we designed and evaluated three rapid PCR
typing methods for this pathogen using primers designed on the basis of
the following specific sequences: conserved ribosomal gene spacer
sequence (RS), repetitive extragenic palindromic sequence (REP), and
enterobacterial repetitive intergenic consensus sequence (ERIC). Typing
patterns and clustering analysis indicated that these methods
apparently differentiated V.
parahaemolyticus strains from reference strains of
interspecific Escherichia coli,
V. cholerae, and V.
vulnificus and were also valuable in subspecies typing
of this pathogen. Forty domestic strains of V.
parahaemolyticus, representing a wide range of PFGE
patterns, were grouped into 15, 27, and 27 patterns, with
discrimination indexes of 0.91, 0.97, and 0.98, by RS-, REP-,
and ERIC-PCR, respectively. The discriminative abilities of these PCR
methods closely approached or even exceeded those of PFGE and
ribotyping. REP-PCR is preferable to ERIC-PCR because of the greater
reproducibility of its fingerprints, while RS-PCR may be a practical
method because it generates fewer amplification bands and patterns than
the alternatives.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.12.4233-4240.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Evaluation of Typing of Vibrio
parahaemolyticus by Three PCR Methods Using
Specific Primers
*
Corresponding author. Mailing address: Department of
Microbiology, Soochow University, Taipei, Taiwan 111, Republic of
China. Phone: (886)2-28819471, ext. 6852. Fax: (886)2-28831193. E-mail: wonghc{at}mail.scu.edu.tw.
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