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Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus
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Assays for the Specific Growth Rate and Cell-binding Ability of Rotavirus

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[Prospective study of rotavirus infections in Belém, Pará, Brazil: clinical and epidemiological features]

A C Linhares1, Y B Gabbay, J D Mascarenhas

  • 1Instituto Evandro Chagas-Fundação Nacional de Saúde do Ministério sa Saúde, Belém, Pará, Brazil.

Jornal De Pediatria
|July 1, 1994
PubMed

Insights

This study assessed the Rhesus-human reassortant rotavirus (RRV-TV) vaccine's effectiveness in Brazilian children. Rotavirus was linked to severe diarrhea, with serotype 1 being most common, highlighting the need for rotavirus vaccination.

Area of Science:

  • * Tropical Medicine
  • * Pediatrics
  • * Vaccinology

Background:

  • * Acute diarrheal diseases pose a significant health burden, particularly in developing regions.
  • * Rotavirus is a leading cause of severe diarrhea in children globally and in the Amazon region.
  • * Understanding rotavirus epidemiology and clinical presentation is crucial for public health interventions.

Purpose of the Study:

  • * To evaluate the immunogenicity, safety, and efficacy of the Rhesus-human reassortant rotavirus (RRV-TV) vaccine.
  • * To expand knowledge on the clinical and epidemiological characteristics of rotavirus infections in the Amazon region.
  • * To identify prevalent rotavirus serotypes and co-infections associated with acute diarrhea.

Main Methods:

  • * A prospective study involving 540 children in Belém, Pará, Brazil, from April 1990 to September 1992.
  • * A placebo-controlled trial design to assess vaccine efficacy and safety.
  • * Monitoring of diarrheal episodes, pathogen identification (including rotavirus serotyping), and clinical severity scoring.

Main Results:

  • * Rotavirus was identified in 86 (3.1%) of 2,789 diarrheal episodes; serotype 1 was most prevalent (67.9%).
  • * Rotavirus-related diarrhea occurred at a rate of 0.2 episodes per child/year and was more severe than diarrhea of other etiologies.
  • * Common co-infections included Giardia intestinalis and enteropathogenic Escherichia coli; rotavirus-related diarrhea peaked during dry months.

Conclusions:

  • * The RRV-TV vaccine trial provided valuable data on rotavirus in the Amazon region.
  • * Rotavirus, particularly serotype 1, is a significant cause of severe childhood diarrhea in this area.
  • * Findings support the importance of rotavirus surveillance and vaccination programs in tropical regions.

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