Table 2.

Mean number of Triatoma infestans per site and number of infested sites by year of survey from 1993 to 1997 in Amamá, Argentina

	Mean number of bugs per site (number of infested sites) by year
Ecotope	1993	1994	1995	1996	1997
Domicile	0 (0)	1 (2)	1 (1)	1 (19)	4 (34)
Pig corral	6 (1)	0 (0)	3 (3)	3 (3)	8 (10)
Goat corral	0 (0)	0 (0)	0 (0)	5 (1)	6 (7)
Wood pile	0 (0)	1 (1)	2 (2)	1 (3)	3 (3)
Ecotope associated with chickens	1 (1)	0 (0)	4 (1)	4 (6)	9 (17)
Fence and tree	1 (1)	1 (1)	0 (0)	0 (0)	1 (1)
Total	3 (3)	1 (4)	2 (7)	2 (32)	6 (72)