[Prevalence of hepatitis B and D serological markers in the Parakanã, Apyterewa Indian Reservation, Pará State, Brazil].

In order to study the prevalence of hepatitis B (HBV) and D (HDV) viruses in the Parakanã Indians and to evaluate the impact of hepatitis B vaccination beginning there in 1995, 258 serum samples were analyzed in the year 2004 for hepatitis B and D serological markers using immunoenzymatic techniques; the results showed a moderate endemic pattern, with a total prevalence of HBV infection of 55.7% and 5.4% of virus carriers in the Apyterewa village and 49.

[Hepatitis C: prevalence and risk factors among patients with HIV/AIDS in Belém Pará, in Brazilian Amazon].

The objective of this investigation was to study the prevalence of hepatitis C virus infection and to identify possible risk factors for its transmission, in 406 adult patients with HIV/AIDS who attended at public health services, in Belém city, Pará, Brazil. The anti-HCV was performed by third generation immunoenzymatic technique, and the HCV RNA by polymerase chain reaction. The overall prevalence of hepatitis C virus was 16% (CI: 12.

[Soroepidemiological survey of hepatitis B virus among HIV/AIDS patients in Belém, Pará--Brasil].

The objective of this investigation was to study the prevalence of hepatitis B virus infection in a sample of 406 adult patients with human immunodeficiency virus infection who attended at the public health care in the city of Belém, Pará, Brazil, as well as analyzing possible risk factors for hepatitis B virus infection. The overall prevalence of hepatitis B virus infection was 51% (CI: 46.1 - 55.