Seroprevalence of hepatitis B infection and active immunization in Ecuadorian Amazonian indigenous people: A cross-sectional study

Introduction: Hepatitis B surveillance is crucial. We proposed to describe the seroprevalence of infection and associated factors among Ecuadorian Amazonia communities. Outline: A serologic cross-sectional study was carried out in subjects over two years old. classified seropositivity according Centers Diseases Control criteria recorded sex, age, temporary migration, sometime their life, previous vaccination. Results: Out 215 participants, 50.0%, 8.8%, 1.9%, 1.4% were susceptible, immune due natural infection, chronic early acute HBV respectively. Of 8 people who reported having ever been diagnosed with B, none showed or one positive for immunity vaccine. HBsAg found 3.3% (95% IC 0.9-7.0) higher those migrate 7.7% (p-value 0.04). 16.3% CI 11.6-21.4) Among 58 participants declared received vaccine, 20.7% presented post-vaccine immunity. Implications: Participants should have benefited from vaccination campaign (susceptible) are lowest response To assessing burden viral hepatitis living marginalized areas guide preventive measures mandatory.