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Table 1 Distribution of Trypanosoma cruzi infection in Triatoma infestans by environment and type of ecotope, Avia Terai, Chaco, 2015–2016

From: Trypanosoma cruzi infection in Triatoma infestans and high levels of human–vector contact across a rural-to-urban gradient in the Argentine Chaco

Environment and ecotope (no. of houses inspected)a Bug level House level
% of bugs examined (no. collected) % of bugs infected (no. examined) 95% CI % examined for infection (no. infested) % harboring infected bugs (no. examined) 95% CI
Urban (416)
 Domiciles 85.7 (14) 0.0 (12) 0.0–24.3 66.7 (3) 0.0 (2) 0.0–65.8
 Peridomestic HR 100.0 (67) 0.0 (67) 0.0–5.4 87.5 (8) 0.0 (7) 0.0–32.2
 Peridomestic LR 7.2 (485) 0.0 (35) 0.0–9.9 25.6 (39) 0.0 (10) 0.0–27.8
 Total 20.1 (566) 0.0 (114) 0.0–3.2 38.0 (50) 0.0 (19) 0.0–16.8
Peri-urban (210)
 Domiciles 98.1 (53) 17.3 (52) 9.2–30.0 100.0 (14) 21.4 (14) 6.8–48.3
 Peridomestic HR 24.3 (226) 5.5 (55) 1.9–14.9 85.7 (14) 18.2 (12) 4.0–48.9
 Peridomestic LR 4.3 (974) 0.0 (42) 0.0–8.4 24.3 (37) 0.0 (9) 0.0–29.9
 Total 11.9 (1253) 8.1 (149) 4.7–13.6 51.7 (60) 16.1 (31) 7.1–32.6
Rural (276)
 Domiciles 50.9 (228) 9.5 (116) 5.2–16.3 96.2 (26) 24.0 (25) 11.2–43.2
 Peridomestic HR 29.6 (358) 8.5 (106) 4.4–15.6 89.7 (29) 15.4 (26) 5.8–35.2
 Peridomestic LR 3.8 (2003) 0.0 (76) 0.0–4.8 26.6 (64) 0.0 (17) 0.0–18.4
 Total 11.5 (2589) 6.7 (298) 4.4–10.1 57.3 (103) 13.6 (59) 7.0–25.5
Total (902) 12.7 (4408) 5.7 (561) 4.1–8.0 51.2 (213) 11.9 (109) 7.7–20.5
  1. CI, Confidence interval
  2. aPeridomestic HR, Peridomestic ecotopes with high risk of bug infection; peridomestic LR, peridomestic ecotopes with low risk of bug infection