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Serotyping of Streptococcus pyogenes isolated from common and severe invasive infections in Japan, 1990–5: implication of the T3 serotype strain-expansion in TSLS

Published online by Cambridge University Press:  01 August 1997

Y. INAGAKI ,
T. KONDA ,
S. MURAYAMA ,
S. YAMAI ,
A. MATSUSHIMA ,
Y. GYOBU ,
D. TANAKA ,
A. TAMARU ,
C. KATSUKAWA  and
A. KATAYAMA
...Show all authors
Y. INAGAKI
Affiliation:
Department of Bacteriology, National Institute of Health, Shinjuku-ku, Tokyo, 162, Japan
T. KONDA
Affiliation:
Department of Bacterial and Blood Products Center For Biologics Control and Research, National Institute of Health, Musashimurayama-shi, Tokyo, 208, Japan
S. MURAYAMA
Affiliation:
Department of Bacteriology, Yamagata Prefectural Institute of Public Health, Yamagata-shi, 990, Japan
S. YAMAI
Affiliation:
Department of Bacteriology and Pathology, Kanagawa Prefectural Public Health Laboratory, Asahi-ku, Yokohama-shi, 241, Japan
A. MATSUSHIMA
Affiliation:
Department of Bacteriology and Pathology, Kanagawa Prefectural Public Health Laboratory, Asahi-ku, Yokohama-shi, 241, Japan
Y. GYOBU
Affiliation:
Department of Bacteriology, Toyama Institute of Health, Koshugi-machi, Toyama Prefecture, 939-03, Japan
D. TANAKA
Affiliation:
Department of Bacteriology, Toyama Institute of Health, Koshugi-machi, Toyama Prefecture, 939-03, Japan
A. TAMARU
Affiliation:
Department of Microbiology, Osaka Prefectural Institute of Public Health, Higashinari-ku, Osaka, 537, Japan
C. KATSUKAWA
Affiliation:
Department of Microbiology, Osaka Prefectural Institute of Public Health, Higashinari-ku, Osaka, 537, Japan
A. KATAYAMA
Affiliation:
Department of Microbiology, Yamaguchi Prefectural Research Institute of Health, Yamaguchi-shi, Yamaguchi, 753, Japan
M. TOMITA
Affiliation:
Department of Microbiology, Yamaguchi Prefectural Research Institute of Health, Yamaguchi-shi, Yamaguchi, 753, Japan
Y. FUCHI
Affiliation:
Department of Bacteriology, Oita Prefectural Institute of Health and Environment, Oita-shi, 870, Japan
K. HOASHI
Affiliation:
Department of Bacteriology, Oita Prefectural Institute of Health and Environment, Oita-shi, 870, Japan
H. WATANABE
Affiliation:
Department of Bacteriology, National Institute of Health, Shinjuku-ku, Tokyo, 162, Japan
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Abstract

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To clarify the relationship between the epidemics of severe invasive group A streptococcal infections (streptococcal Toxic Shock-Like Syndrome; TSLS) and common group A streptococcal infections in Japan, we examined the T serotypes of S. pyogenes strains (group A streptococci) isolated from clinical specimens of the streptococcal infections (17999 cases) in the period 1990–5, including the severe infections (TSLS) (29 cases) in the period 1992–5. Characteristic points of the analyses were: (1) dominant serotypes of the infections in these periods were T12, T4, T1, T28 and TB3264, which were consistently isolated; (2) isolates of T3 rapidly increased through 1990 to 1994 while T6 decreased in the period 1990–3; (3) when Japanese area was divided into three parts, T3 serotype tended to spread out from the north-eastern to the south-western area; (4) strains of T3 and T1 serotypes were dominant in the TSLS. Dominant-serotype strains of streptococcal infections did not always induce severe infections and dominance of T3 serotype in the TSLS seemed to be correlated with the increase of T3 in streptococcal infections. These results may indicate that certain clones of S. pyogenes are involved in the pathogenesis of the TSLS.

Type
Research Article
Information
Epidemiology & Infection , Volume 119 , Issue 1 , August 1997 , pp. 41 - 48
Copyright
© 1997 Cambridge University Press