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Updated: Jul 17, 2026
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Published on: November 4, 2016
[Pulse electrophoresis of serogroup A streptocci isolated in Moscow]
Abstract:
Pulse electrophoresis of group A streptococci (GAS) isolated in 1998 - 2004 in Moscow from patients during outbreaks of tonsillitis in child institutions, military unit and also from sporadic cases in children and adults was performed. During analysis of 48 strains 16 pulse electrotypes were recognized. These data allow to consider that in different child institutions (and other groups) accumulation and spreading of most adapted to such environment variants of GAS are take place and population structure of GAS in such institutions is unique on molecular and other characteristics. This study showed that complex typing of GAS (use of pulse electrophoresis and PCR for detection of erythrogenic toxins A and C) will help to improve molecular-epidemiologic surveillance for streptococcal group A infection, development of recommendations on reduction of morbidity from this infection and also to decrease risk of its severe forms, complications and mortality.
Insights
Molecular typing of Group A Streptococcus (GAS) revealed unique bacterial strains in different Moscow institutions between 1998-2004. This finding aids in tracking and controlling GAS infections.
Area of Science:
- Microbiology
- Epidemiology
- Molecular Biology
Context:
- Group A Streptococcus (GAS) infections, particularly tonsillitis, pose a significant public health concern, especially in institutional settings.
- Surveillance of GAS strains is crucial for understanding transmission dynamics and developing effective control strategies.
- Previous studies have highlighted the genetic diversity of GAS, but detailed molecular epidemiology in specific environments like child institutions requires further investigation.
Purpose:
- To characterize the molecular epidemiology of Group A Streptococcus (GAS) strains isolated from various settings in Moscow between 1998 and 2004.
- To identify distinct pulse electrotypes of GAS and assess their prevalence in different patient groups and institutions.
- To evaluate the utility of combining pulse-field gel electrophoresis (PFGE) with PCR for detecting erythrogenic toxins in enhancing molecular-epidemiologic surveillance of GAS infections.
Summary:
- A study analyzed 48 Group A Streptococcus (GAS) strains from Moscow (1998-2004) using pulse-field gel electrophoresis (PFGE), identifying 16 distinct pulse electrotypes.
- Findings suggest that specific, adapted GAS variants accumulate and spread within distinct institutional environments, leading to unique population structures.
- Combined typing methods, including PFGE and PCR for SpeA and SpeC toxins, provide a robust approach for molecular-epidemiologic surveillance.
Impact:
- This research enhances the molecular-epidemiologic surveillance of Group A Streptococcus (GAS) infections, enabling better tracking of outbreaks.
- The findings contribute to the development of targeted recommendations for reducing morbidity associated with GAS infections.
- Improved surveillance and understanding of GAS strain diversity can decrease the risk of severe disease, complications, and mortality.
