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Table 1 Hepatitis B and C virus markers among individuals from Amerindian tribes and urban areas of Tocantinopolis city (n = 948)

From: Determination of hepatitis B, C and D prevalence among urban and Amerindian populations from the Eastern Brazilian Amazon: a cross sectional study

  Number Tested HBsAg - anti-HBc + anti-HBs + (HBV cleared infection) HBsAg - anti-HBc + anti-HBs - (Chronic inactive/immune controlled HBV infection) HBsAg - anti-HBc – anti-HBs + (HBV Vaccination group) HBsAg + anti-HBs – (HBV active infection) HBsAg – anti-HBc - anti-HBs – (HBV susceptible individuals) anti-HCV +
Total population studied 948 (100%) 120 (12.6%) 18 (1.9%) 268 (28.3%) 4 (0.4%) 538 (56.7%) 8 (0.8%)
Sex
 Female 505 (53.3%) 56 (11.1%) 9 (1.8%) 143 (28.3%) 2 (0.4%) 296 (58.6%) 1 (0.2%)
 Male 443 (46.7%) 64 (14.4%) 9 (2.0%) 125 (28.2%) 2 (0.4%) 242 (54.6%) 7 (1.6%)
Age group (years)
 0–20 438 (46.2%) 9 (2.0%) 3 (0.7%) 166 (0.4%) 2 (0.4%) 258 (58.9%) 0 (0.0%)
 21–40 277 (29.2%) 31 (11.2%) 0 (0.0%) 88 (31.7%) 1 (0.4%) 157 (56.6%) 4 (1.4%)
 41–60 142 (14.9%) 49 (34.5%) 5 (3.5%) 9 (6.3%) 1 (0.7%) 78 (54.9%) 3 (2.1%)
 > 60 91 (9.6%) 31 (34.1%) 10 (11.0%) 5 (5.5%) 0 (0.0%) 45 (49.4%) 1 (1.1%)
Location
 Amerindian tribes 603 (63.6%) 78 (12.9%) 11 (1.8%) 164 (27.2%) 3 (0.5%) 348 (57.7%) 7 (1.2%)
  Prata village 53 (5.6%) 2 (3.8%) 0 (0.0%) 24 (45.3%) 0 (0.0%) 27 (50.9%) 0 (0.0%)
  Girassol village 89 (9.4%) 16 (17.9%) 0 (0.0%) 14 (15.7%) 1 (1.1%) 58 (65.2%) 1 (1.1%)
  Mariazinha village 206 (21.7%) 29 (14.1%) 1 (0.5%) 51 (24.7%) 1 (0.5%) 124 (60.2%) 3 (1.4%)
  Riachinho village 18 (1.9%) 3 (16.6%) 0 (0.0%) 6 (33.3%) 0 (0.0%) 9 (50.0%) 0 (0.0%)
  Serrinha village 66 (7.0%) 1 (1.5%) 0 (0.0%) 17 (25.7%) 0 (0.0%) 48 (72.7%) 1 (1.5%)
  Folha Grossa village 171 (18.0%) 27 (15.8%) 10 (5.8%) 52 (30.4%) 1 (0.6%) 82 (0.5%) 2 (1.2%)
 Non-Amerindian (Urban areas) 345 (36.4%) 42 (12.2%) 7 (2.0%) 128 (37.1%) 1 (0.3%) 191 (55.4%) 1 (0.3%)
  Cacau urban area 60 (6.3%’) 3 (5.0%) 1 (1.7%) 12 (20.0%) 0 (0.0%) 44 (73.3%) 1 (1.7%)
  Mumbuco urban area 81 (8.5%) 9 (11.1%) 1 (1.2%) 32 (39.5%) 0 (0.0%) 39 (48.1%) 0 (0.0%)
  BelaVista urban area 10 (1.0%) 2 (20.0%) 0 (0.0%) 2 (20.0%) 0 (0.0%) 6 (60.0%) 0 (0.0%)
  Urban area block 18 84 (8.9%) 10 (11.2%) 3 (3.6%) 25 (29.7%) 1 (1.2%) 45 (53.6%) 0 (0.0%)
  Urban area block 22 61 (6.4%) 5 (8.2%) 2 (3.3%) 21 (34.4%) 0 (0.0%) 33 (54.1%) 0 (0.0%)
  Tocantinópolis Downtown 49 (5.2%) 13 (26.5%) 0 (0.0%) 36 (73.5%) 0 (0.0%) 24 (49.0%) 0 (0.0%)