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Detection and Genogrouping of Noroviruses from Children's Stools By Taqman One-step RT-PCR
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Molecular Epidemiology of Group A Rotavirus Causing Acute Diarrhea in Infants and Young Children in Rio de Janeiro,

da Silva Vaz Md1, da Silva Domingues AL, Moreno

  • 1Department of Virology - Federal University of Rio de Janeiro, Brazil.

The Brazilian Journal of Infectious Diseases : an Official Publication of the Brazilian Society of Infectious Diseases
|November 30, 2000
PubMed

Insights

Group A rotavirus causes acute diarrhea in children. This study found distinct epidemiologic patterns for long and short rotavirus electropherotypes, with long types circulating continuously and short types appearing episodically in infants.

Area of Science:

  • Epidemiology
  • Virology
  • Public Health

Background:

  • Group A rotavirus is a leading cause of acute gastroenteritis in infants and young children globally.
  • Understanding the molecular epidemiology of circulating rotavirus strains is crucial for disease control and prevention strategies.

Purpose of the Study:

  • To investigate the epidemiological characteristics of group A rotavirus strains causing acute diarrhea in young children in Rio de Janeiro.
  • To analyze the prevalence and patterns of different rotavirus electropherotypes (long and short) during the study period.

Main Methods:

  • An epidemiological survey was conducted between April 1997 and February 1998.
  • Rotavirus detection in stool specimens using established diagnostic methods.
  • Electropherotyping of detected rotavirus strains using polyacrylamide gel electrophoresis (PAGE) to determine dsRNA patterns.

Main Results:

  • Rotaviruses were detected in 18.6% of examined specimens.
  • The majority of strains (70%) exhibited a long dsRNA pattern (LD), which was the most common electropherotype and had been previously identified.
  • Short dsRNA patterns (SA and SB types) were less common (30%), with SB types showing a decrease compared to 15 years prior. Short patterns were exclusively observed in infants (0-11 months) during May-June 1997.

Conclusions:

  • Distinct epidemiologic behaviors were observed between long and short rotavirus electropherotypes.
  • Long electropherotypes appear to circulate continuously within the community across a wider age range (0-8 years).
  • Short electropherotype strains exhibited an episodic circulation pattern, primarily affecting young children (0-11 months).

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