Molecular heterogeneity among north Indian isolates of Group A Streptococcus

Sagar, V. ; Bakshi, D. K. ; Nandi, S. ; Ganguly, N. K. ; Kumar, R. ; Chakraborti, A. (2004) Molecular heterogeneity among north Indian isolates of Group A Streptococcus Letters in Applied Microbiology, 39 (1). pp. 84-88. ISSN 0266-8254

Full text not available from this repository.

Official URL:

Related URL:


Aim: To monitor molecular heterogeneity among the clinical isolates of group A Streptococcus (GAS) from north India by Vir and emm typing. Methods and Results: GAS isolates, 31 from pharyngitis and nine from rheumatic fever (RF)/rheumatic heart disease (RHD) patients were differentiated into 16 Vir types (VT). These isolates were further discriminated into 23 emm types. Most of emm types were Vir type specific, except few (7.5%), which revealed different Vir types within same emm type. The most prevalent emm type found was emm 49 (15%) followed by 7.5% of emm 69, emm 71 and emm 75 which were different from emm type distribution reported from south India. Conclusions: Analysis of data revealed 40% heterogeneity by Vir typing and 57.5% by emm typing among GAS isolates which is significant in view of small number of isolates studied. Significance of Impact of the Study: The molecular study for the first time demonstrates different emm types prevalent and circulating in northern region of India and such data may help in selection of types for vaccine development.

Item Type:Article
Source:Copyright of this article belongs to Society for Applied Microbiology.
Keywords:Emm Typing; Group a Streptococcus; Pharyngitis; Rf/RHD; Vir-typing
ID Code:12139
Deposited On:10 Nov 2010 04:18
Last Modified:31 May 2011 10:19

Repository Staff Only: item control page