Human Trypanosoma cruzi infection in the Argentinean Chaco: risk factors and identification of households with infected children for treatment

Table 1 Seroprevalence of Trypanosoma cruzi infection, odds ratio and estimated force of infection (FOI) according to household ethnicity and area of residence, Pampa del Indio, Chaco

Category	N	Mean exposure time ± SD	Seroprevalence (%, 95% CI)	FOI (95% CI)	Adjusted OR^a (95% CI)
Area II creole	174	29.5 ± 21.5	20.7 (15.3–27.3)	0.74 (0.30–1.23)	1
Area II Qom	775	16.3 ± 16.7	24.1 (21.3–27.3)	1.37 (0.94–1.90)	2.30 (1.27–4.18)
Area IV creole	196	20.5 ± 19.3	31.6 (25.5–38.5)	1.66 (1.13–2.35)	2.60 (1.29–5.25)
Area IV Qom	192	19.7 ± 17.1	27.5 (18.9–31.0)	1.16 (0.81–1.58)	2.02 (0.98–4.16)
Total	1337	18.6 ± 18.1	24.8 (22.2–26.8)	1.23 (0.88–1.66)	–

^a Model: T. cruzi serostatus ~ exposure time + ethnicity + area of residence + ethnicity x area of residence + (1|Household)

ISSN: 1756-3305