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AGE-SPECIFIC PREVALENCE OF ANTIBODIES TO HEPATITIS A IN CHILDREN AND ADOLESCENTS FROM RIO DE JANEIRO, BRAZIL, 1978 AND 1995. RELATIONSHIP OF PREVALENCE TO ENVIRONMENTAL FACTORS
Soroepidemiologia
Anticorpos
Crianças
Adolescentes
Rio de Janeiro
Fatores ambientais
Seroepidemiology
Anti-HAV
Antibodies
Children
Adolescents
Environmental Factors
Rio de Janeiro
Autor
Afiliación
Universidade Federal Fluminense. Centro de Ciências Médicas. Departamento de Microbiologia e Parasitologia. Niterói, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Rio de Janeiro, RJ. Brasil.
Universidade Federal Fluminense. Centro de Ciências Médicas. Departamento de Microbiologia e Parasitologia. Niterói, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Rio de Janeiro, RJ. Brasil.
Universidade Federal Fluminense. Centro de Ciências Médicas. Departamento de Microbiologia e Parasitologia. Niterói, RJ, Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Departamento de Virologia. Rio de Janeiro, RJ. Brasil.
Resumen en ingles
The age-specific prevalence of antibodies to hepatitis A virus (anti-HAV) was determined in two different population groups with low socio-economic status from Rio de Janeiro city, Brazil, whose serum samples were collected 17 years apart (Population 1, 1978; Population 2, 1995). In Population
2, analysis of the anti-HAV prevalence was also carried out with respect to environmental factors. Population 1 was composed of 520 stored sera collected from the umbilical cord of term neonates and children aged 1 month to 6 years. In population 2, 720 serum samples were collected from children and adolescents with ages ranging from 1 to 23 years. The overall prevalence rate of anti-HAV in Population 1 and Population 2 was 65.6% and 32.1%, respectively. In Population 1, the anti-HAV prevalence
reached 88% at the age of 3, while in Population 2, it increased from 4.5% in children under the age of 3 to 66% in the group of adolescents over the age of 14. The low exposure to HAV infection in younger children from Population 2 could be a result of improved environmental hygiene and sanitation, as demonstrated by the presence of piped water, waste and sewage disposal systems in most houses from this population group. These findings indicate a possible change in the prevalence of hepatitis A in Rio
de Janeiro.
Palabras clave en portugues
Vírus da Hepatite ASoroepidemiologia
Anticorpos
Crianças
Adolescentes
Rio de Janeiro
Fatores ambientais
Palabras clave en ingles
Hepatitis ASeroepidemiology
Anti-HAV
Antibodies
Children
Adolescents
Environmental Factors
Rio de Janeiro
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