Seroepidemiology of hepatitis a and b in two urban communities of Rio de Janeiro, Brazil

• Published in: Revista do Instituto de Medicina Tropical de São Paulo
• Main Authors: Abdulbasit R. N. Abuzwaida, Marli Sidoni, Clara F. T. Yoshida, Hermann G. Schatzmayr
• Format: Article in Journal/Newspaper
• Language: English
• Published: Universidade de São Paulo (USP) 1987
• Subjects: Soroepidemiology; HBsAg anti-HBs anti-HAV; Arctic medicine. Tropical medicine; RC955-962; Infectious and parasitic diseases; RC109-216; Arctic
• Online Access: https://doi.org/10.1590/S0036-46651987000400006; https://doaj.org/article/de6a749f89a14587bb5f7e3d1af0ef90

Hepatitis B markers were determined in 397 individuals from Niterói and 680 from Nova Iguaçu and prevalences of 9.1% (1.0% of HBsAg and 8.1% of anti HBs) and 11.1% (1.8% of HBsAg and 9.3% of antiHBs) were found, respectively. The comparative prevalence of both markers in relation to age showed a higher prevalence of HBsAg in the group 21-50 years old. Considering the antiHBs antibody, it was demostrated a gradual increase with age, reaching 14.9% in Niterói and 29.1% in Nova Iguaçu in individuals over 51 years old. For hepatitis A, in 259 samples from Niterói, equally distributed by age groups, an overall prevalence of 74.5% of anti-HAV antibodies was found. This prevalence increases gradually reaching 90.0% at age over thirty. In 254 samples from Nova Iguaçu analysed, a prevalence of 90.5% of antibodies was encountered when the same criteria of distribution of samples were used. This level of prevalence reached 90.0% already in the age over ten years old. The tests were performed by enzyme immunoassay with reagents prepared in our laboratory.