Table 3. Triatomine positivity rate for T. cruzi by region, species, stage and capture site in Piaui State from 2014 to 2017.

	Central-North		North		Southeast		Southwest
	N	Positive (%)	N	Positive (%)	N	Positive (%)	N	Positive (%)
Triatoma brasiliensis
Adults inside houses	1,970	9 (0.5%)	19	0 (0.0%)	9,297	115 (1.2%)	2,633	17 (0.6%)
Nymphs inside houses	664	4 (0.6%)	24	0 (0.0%)	3,645	26 (0.7%)	775	5 (0.6%)
Adults in peridomestic areas	1,267	32 (2.5%)	57	1 (1.8%)	3,817	68 (1.8%)	1,410	16 (1.1%)
Nymphs in peridomestic areas	3,489	12 (0.3%)	48	0 (0.0%)	9,890	50 (0.5%)	2,606	7 (0.3%)
Triatoma pseudomaculata
Adults inside houses	3,758	35 (0.9%)	252	3 (1.2%)	1,037	6 (0.6%)	1,817	5 (0.3%)
Nymphs inside houses	192	1 (0.5%)	9	0 (0.0%)	140	0 (0.0%)	70	0 (0.0%)
Adults in peridomestic areas	377	3 (0.8%)	55	6 (10.9%)	260	6 (2.3%)	253	3 (1.2%)
Nymphs in peridomestic areas	5,533	21 (0.4%)	461	0 (0.0%)	729	2 (0.3%)	1,212	2 (0.2%)
Triatoma sordida
Adults inside houses	3	0 (0.0%)	0	0 (0.0%)	112	1 (0.9%)	2,113	8 (0.4%)
Nymphs inside houses	0	0 (0.0%)	0	0 (0.0%)	7	0 (0.0%)	70	0 (0.0%)
Adults in peridomestic areas	20	0 (0.0%)	0	0 (0.0%)	10	1 (10%)	110	0 (0.0%)
Nymphs in peridomestic areas	6	0 (0.0%)	0	0 (0.0%)	29	0 (0.0%)	1,214	4 (0.3%)
Rhodnius sp.
Adults inside houses	153	8 (5.3%)	9	1 (11.1%)	2	0 (0.0%)	0	0 (0.0%)
Nymphs inside houses	3	0 (0.0%)	0	0 (0.0%)	0	0 (0.0%)	0	0 (0.0%)
Adults in peridomestic areas	34	2 (5.9%)	26	7 (26.9%)	3	0 (0.0%)	0	0 (0.0%)
Nymphs in peridomestic areas	103	0 (0.0%)	3	0 (0.0%)	0	0 (0.0%)	0	0 (0.0%)
Panstrongylus sp.
Adults inside houses	32	1 (3.1%)	3	0 (0.0%)	36	0 (0.0%)	19	4 (21%)
Nymphs inside houses	6	0 (0.0%)	0	0 (0.0%)	4	0 (0.0%)	0	0 (0.0%)
Adults in peridomestic areas	89	12 (13.4%)	7	4 (57.1%)	93	15 (16.1%)	36	3 (8.3%)
Nymphs in peridomestic areas	12	0 (0.0)	4	0 (0.0%)	9	0 (0.0%)	0	0 (0.0%)