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Isolation rates of Streptococcus pyogenes in patients with acute pharyngotonsillitis and among healthy school children in Iran

Published online by Cambridge University Press:  01 February 2000

A. JASIR ,
A. NOORANI ,
A. MIRSALEHIAN  and
C. SCHALEN
A. JASIR
Affiliation:
Department of Medical Microbiology, University of Lund, Sölvegatan 23, S-22362 Lund, Sweden
A. NOORANI
Affiliation:
Department of Medical Microbiology, Tehran University of Medical Sciences & Health Services, Tehran, Iran
A. MIRSALEHIAN
Affiliation:
Department of Medical Microbiology, Tehran University of Medical Sciences & Health Services, Tehran, Iran
C. SCHALEN
Affiliation:
Department of Medical Microbiology, University of Lund, Sölvegatan 23, S-22362 Lund, Sweden
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Abstract

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We examined three populations from the Tehran region and the North part of Iran (Gilan), in all more than 5000 individuals, for carriage of Streptococcus pyogenes (group A streptococci; GAS). Children or adults with acute pharyngotonsillitis and healthy school children harboured GAS in 34·1, 20·0 and 21·0%, respectively. Typing of 421 randomly selected isolates showed a predominance of M-types M4, M5, M11, M12, as well as the provisional type 4245; however, many of the isolates were T and M non-typable. Forty-three percent of all strains were opacity factor (OF) negative. The type distribution differed markedly from that reported in 1973–4, when M types 1 and 12 were predominant.

Type
Research Article
Information
Epidemiology & Infection , Volume 124 , Issue 1 , February 2000 , pp. 47 - 51
Copyright
© 2000 Cambridge University Press