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Cohort study of rotavirus serotype patterns in symptomatic and asymptomatic infections in Mexican children

F Raúl Velázquez1, J J Calva, M Lourdes Guerrero

  • 1Department of Infectious Diseases, Instituto Nacional de la Nutrición, Mexico City, Mexico.

The Pediatric Infectious Disease Journal
|January 1, 1993
PubMed

Insights

Human rotavirus (HRV) infections are common in young children, often asymptomatic, and occur seasonally. Serotypes 1, 2, 3, and 4 cause similar risks for diarrhea and severity.

Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Virology

Background:

  • Human rotavirus (HRV) is a leading cause of severe diarrheal disease in infants globally.
  • Understanding HRV epidemiology, including serotype distribution and seasonality, is crucial for prevention strategies.

Purpose of the Study:

  • To determine the serotype-specific incidence, morbidity, and seasonal patterns of symptomatic and asymptomatic HRV infections in Mexican children.
  • To analyze the relationship between HRV infection, age, and the occurrence of co-infections with other enteropathogens.

Main Methods:

  • A cohort of 200 Mexican children was monitored from birth to 2 years.
  • Serotype-specific incidence, clinical presentation (symptomatic vs. asymptomatic), and seasonal patterns of HRV infections were recorded.
  • Co-infections with other enteropathogens were identified in cases of HRV-associated diarrhea.

Main Results:

  • 177 HRV infections occurred in 134 children (67%), with 50% being asymptomatic.
  • The overall incidence of HRV infections was 0.6 episode/child year, inversely related to age.
  • HRV-associated diarrhea peaked in infants aged 4-6 months; infections were most frequent in autumn, with serotype 3 being predominant.
  • Co-infections with other enteropathogens occurred in 26% of HRV diarrhea cases but did not increase severity.

Conclusions:

  • HRV infections are common in early childhood in this population, frequently asymptomatic, and exhibit seasonal variation.
  • Multiple HRV serotypes circulate, with no single serotype being a significant risk factor for diarrhea or its severity.
  • The findings highlight the importance of continued surveillance and potential for broad-spectrum interventions against HRV.

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