The occurrence of hepatitis B and delta virus infection within seven Amerindian ethnic groups in the Brazilian western Amazon

WSM Braga, LM Brasil, RAB de Souza… - Revista da …, 2001 - search.proquest.com
WSM Braga, LM Brasil, RAB de Souza, M da Costa Castilho, JC da Fonseca
Revista da Sociedade Brasileira de Medicina Tropical, 2001search.proquest.com
HBV and HDV infections are a major health problem in the Amazon. This study evaluates
the prevalence of these viruses within Indians groups, measuring the frequency of
serological markers. The prevalence of past infection was 54.5% and HBsAg was found in
9.7%. An important variation of those markers was detected between villages, inclusively
within the same ethnic group. None showed evidence of an acute infection. All HBeAg
reactive were Apurinã, living in the same village and three of them from the same family. The …
Abstract
HBV and HDV infections are a major health problem in the Amazon. This study evaluates the prevalence of these viruses within Indians groups, measuring the frequency of serological markers. The prevalence of past infection was 54.5% and HBsAg was found in 9.7%. An important variation of those markers was detected between villages, inclusively within the same ethnic group. None showed evidence of an acute infection. All HBeAg reactive were Apurinã, living in the same village and three of them from the same family. The prevalence of anti-HDT was 13.4% in HBsAg positive individuals. The authors observed high prevalence of HBV and HDV infection with the following pattern: low degree of infectivity, marked transmission in early ages, intra-familial dissemination, and lack of importance of vertical transmission. However, the results suggest that these viruses were not yet introduced effectively in some of the studied groups.
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