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Journal of Clinical Microbiology, February 2001, p. 618-621, Vol. 39, No. 2
Unité des Entérobactéries,
INSERM U389, Institut Pasteur, Paris, France,1
and Department of Microbiology, Tokyo Metropolitan Research
Laboratory of Public Health, Tokyo, Japan2
Received 7 July 2000/Returned for modification 28 August
2000/Accepted 4 November 2000
From September 1997 to November 1998, the French National Center
for Salmonella and Shigella received 22 Shigella isolates recovered from 22 different patients
suffering from dysentery. None of these isolates reacted with any of
the antisera used to identify established Shigella
serotypes, but all of them agglutinated in the presence of antisera to
a previously described potentially new Shigella dysenteriae
serotype (represented by strain 96-204) primarily isolated from stool
cultures of imported diarrheal cases in Japan. All French isolates, as
well as strain 96-204, showed biochemical reactions typical of
S. dysenteriae and gave positive results in a PCR assay for
detection of the plasmid ipaH gene coding for invasiveness.
No Shiga toxin gene was detected by PCR. These isolates were
indistinguishable by molecular analysis of ribosomal DNA (ribotyping)
and seemed to be related to S. dysenteriae serotypes 3 and
12. However, further characterization by restriction of the amplified
O-antigen gene cluster clearly distinguished this new serotype from all
other Shigella or Escherichia coli serotypes.
0095-1137/01/$04.00+0 DOI: 10.1128/JCM.39.2.618-621.2001
Copyright © 2001, American Society for Microbiology. All rights reserved.
Molecular and Phenotypic Characterization of
Potentially New Shigella dysenteriae Serotype
*
Corresponding author. Mailing address: Unité des
Entérobactéries, Institut Pasteur, 28, Rue du Docteur Roux,
75724 Paris Cedex 15, France. Phone: 33 145688340. Fax: 33 145688837. E-mail: pgrimont{at}pasteur.fr.
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