Relationship between the prevalence of antibodies to hepatitis B core antigen and arbovirus in fishermen from the Ribeira Valley, Brazil Relação entre as prevalências de anticorpos para hepatite B (anti-HBc) e arbovirus em pescadores da região do Vale do Ribeira, São Paulo, Brasil
Sera from 299 fishermen 16 to 80 years old, residents in Cananeia and Iguape counties, southern cost of São Paulo State, Brazil, were studied in order to identify a possible association between the prevalence of specific antibodies to the hepatitis B virus (HBV) and exposure to haematophagus mosquit...
| Published in: | Revista do Instituto de Medicina Tropical de São Paulo |
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| Main Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | English Portuguese |
| Published: |
Universidade de São Paulo
1990
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| Subjects: | |
| Online Access: | https://doi.org/10.1590/S0036-46651990000300012 https://doaj.org/article/9f257fe82ab440f9b394495aa8a76744 |
| Summary: | Sera from 299 fishermen 16 to 80 years old, residents in Cananeia and Iguape counties, southern cost of São Paulo State, Brazil, were studied in order to identify a possible association between the prevalence of specific antibodies to the hepatitis B virus (HBV) and exposure to haematophagus mosquitoes evaluated by the prevalence of arbovirus antibodies. This professional group presented the highest prevalence of arbovirus antibodies (54.1%) in past investigations carried out in this heavily forested region. Detection of antibody to hepatitis B core antigen (anti-HBc) in the sera was done by enzyme immunoassay (Roche). Prevalence of anti-HBc antibodies in this group was 31.4% (94/299) which is very high compared with 7.2% to 15.0% for different groups of healthy adults in State of São Paulo. No significant difference is observed between the prevalences of HBV antibodies in Iguape and Cananeia. Prevalence of anti-HBc and anti-arbovirus antibodies increases with age. There is a concordance in the distribution according to age groups of the frequency of anti-HBc and anti-arbovirus positive sera. Ag HBs was detected in 4% of the studied sera. These results support the hypothesis that the transmission of the hepatitis B virus and the arboviruses may be due to the same factor, one of the possibilities would be by anthropophilic mosquitoes. Soros de 299 pescadores de 18 a 80 anos de idade, residentes nos municípios de Iguape e Cananéia, região sul do Estado de São Paulo, foram estudados com o objetivo de identificar uma possível associação entre a prevalência de anticorpos específicos para a hepatite B e a exposição a mosquitos hematófagos, avaliada indiretamente pela prevalência de anticorpos de arbovírus. Esse grupo profissional apresentou, em pesquisas anteriores nessa área extensamente coberta por mata, a mais alta prevalência de anticorpos de arbovírus (54,1%). Utilizou-se teste imunoenzimático para detecção de anti-HBc e HBs Ag. Em 31,4% dos soros estavam presentes anticorpos anti-HBc, proporção ... |
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