Brazilian Health Surveillance: reflections and contribution to the debate of the First National Conference on Health Surveillance.

This is a research on the challenges of Health Surveillance, considering its theories and practices. We performed a comprehensive review of international and national literature and institutional documents. Some of the authors also participated in the formulation of the guideline document prepared by the Formulation and Reporting Committee of the First National Conference on Health Surveillance.

HIV and syphilis in the context of community vulnerability among indigenous people in the Brazilian Amazon.

Background: Contextual factors shape the risk of acquiring human immunodeficiency virus (HIV) and syphilis. We estimated the prevalence of both infections among indigenous people in nine indigenous health districts of the Brazilian Amazon and examined the context of community vulnerability to acquiring these infections.

Methods: We trained 509 health care workers to screen sexually active populations in the community for syphilis and HIV using rapid testing (RT).

Prevalence of the CCR5Delta32 mutation in Brazilian populations and cell susceptibility to HIV-1 infection.

We investigated the occurrence of the CCR5Delta32 mutation in various regional ethnic groups in Brazil and tested the resistance of mutant peripheral blood mononuclear cells (PBMCs) to infection by HIV-1 in vitro. The heterozygous prevalence was 5.3% in uninfected African descendents and 8.

Human retroviruses (HIV and HTLV) in Brazilian Indians: seroepidemiological study and molecular epidemiology of HTLV type 2 isolates.

To investigate serological, epidemiological, and molecular aspects of HTLV-1, HTLV-2, and HIV-1 infections in Amerindian populations in Brazil, we tested 683 and 321 sera from Tiriyo and Waiampi Indians, respectively. Both HIV-1 and HTLV-2 infections were detected at low prevalence among the Tiriyos whereas only HTLV-1 was present among the Waiampis, also at low prevalence. Analysis of the nucleotide sequence of the 631 bp of the env gene obtained from the three HTLV-2 isolates detected among the Tiriyos demonstrated by restriction fragment length polymorphism that these viruses belong to subtype IIa.