[Hepatitis A virus infection in Amerindian area in the east Brazilian Amazon].

The hepatitis A virus infection represents an important problem of public health all over the world, being related to the socioeconomic and hygienic conditions of the population. In Brazilian Amazon, seroepidemiological studies in amerindians populations have been demonstrating high endemicity related to the infection. With the objective of evaluate the prevalence of the hepatitis virus A infection in xicrin village, in the municipality district of Altamira-Pará-Brazil, whose investigation was unchained by indigenous child's obit, that clinical developed in nine days with a picture icterus-hemorrhagic, without confirmation by serologic exams, 352 samples of blood were analyzed by serologic tests of the markers of the hepatitis A, B, C and D virus, for immunoenzymatic technic, that indicated a prevalence of 98% of antibodies against the hepatitis A virus, which 30.5% with recent infection, characterizing in laboratorial basis, the outbreak of infection for the virus of the hepatitis A and raising the possibility to be associated with the obit happened in the village.