Table 2. Average number of triatomines at different stages of development and catch sites recorded in the regions of the Piaui State from 2014 to 2017.

	Central-North		North		Southeast		Southwest
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Triatoma brasiliensis
Adults inside houses	22.93	45.870	0.76	1.809	41.79	62.597	18.20	51.973
Nymphs inside houses	7.80	12.830	0.44	1.417	16.92	25.394	5.24	13.706
Adults peridomestic	14.80	30.282	1.20	3.819	17.74	27.928	9.50	28.692
Nymphs peridomestic	40.49	88.933	1.92	4.983	43.85	72.975	18.57	49.927
Triatoma pseudomaculata
Adults inside houses	42.94	90.218	10.08	32.328	4.14	10.387	10.86	26.642
Nymphs inside houses	2.19	4.580	0.32	1.215	0.66	2.080	0.49	2.147
Adults peridomestic	4.31	9.334	1.40	2.677	1.18	3.534	1.77	6.045
Nymphs peridomestic	64.33	144.756	18.44	64.611	2.94	6.901	6.98	18.010
Triatoma sordida
Adults inside houses	0.04	0.187	0.00	0.000	0.49	2.580	13.85	51.104
Nymphs inside houses	0.00	0.000	0.00	0.000	0.04	0.308	0.53	2.008
Adults peridomestic	.24	1.147	0.00	0.000	0.05	0.338	0.81	2.630
Nymphs peridomestic	0.07	0.460	0.00	0.000	0.12	0.591	8.24	27.267
Rhodnius sp.
Adults inside houses	1.82	8.570	0.36	1.319	0.01	0.100	0.00	0.000
Nymphs inside houses	0.04	0.187	0.00	0.000	0.00	0.000	0.00	0.000
Adults peridomestic	0.40	1.318	0.60	2.217	0.01	0.100	0.00	0.000
Nymphs peridomestic	1.23	6.314	0.12	0.600	0.00	0.000	0.00	0.000
Panstrongylus sp.
Adults inside houses	0.38	1.361	0.12	0.600	0.16	0.639	0.15	1.251
Nymphs inside houses	0.07	0.555	0.00	0.000	0.02	0.224	0.00	0.000
Adults peridomestic	1.06	3.316	0.28	0.980	0.45	2.330	0.27	2.053
Nymphs peridomestic	0.14	0.880	0.16	0.800	0.05	0.366	0.00	0.000