Distribution of emm genotypes among group A streptococcus isolates from patients with severe invasive streptococcal infections in Japan, 2001-2005

T. Ikebe, K. Hirasawa, R. Suzuki, H. Ohya, J. Isobe, D. Tanaka, C. Katsukawa, R. Kawahara, M. Tomita, K. Ogata, M. Endoh, R. Okuno, Y. Tada, N. Okabe, H. Watanabe*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

We surveyed emm genotypes of group A streptococcus (GAS) isolates from patients with severe invasive streptococcal infections during 2001-2005 and compared their prevalence with that of the preceding 5 years. Genotype emm1 remained dominant throughout 2001 to 2005, but the frequency rate of this type decreased compared with the earlier period. Various other emm types have appeared in recent years indicating alterations in the prevalent strains causing severe invasive streptococcal infections. The cover of the new 26-valent GAS vaccine fell from 93.5% for genotypes of isolates from 1996-2000 to 81.8% in 2001-2005.

Original languageEnglish
Pages (from-to)1227-1229
Number of pages3
JournalEpidemiology and Infection
Volume135
Issue number7
DOIs
StatePublished - 2007/10

ASJC Scopus subject areas

  • Epidemiology
  • Infectious Diseases

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