Table 1.
Characteristics of the sampled sites and children from the Yaqui and Mayo valleys, Sonora, Mexico
| Town | Children sampled (n) | Sex (M/F) | Age (y) | Residence time (y) | Characteristics of the site |
|---|---|---|---|---|---|
| Cocorit | 12 | 6/6 | 9.0 (8–11) | 8.1 (2–11) | Community adjacent to the agricultural fields (27° 34′.314″N; 109° 57′.328″W) |
| Bácum | 8 | 4/4 | 7.8 (6–12) | 9 (6–12) | Community adjacent to the agricultural fields (27° 33′.190″N; 110° 05′.196″W) |
| Campo 5 | 18 | 10/8 | 8.5 (7–11) | 8.5 (7–11) | Community surrounded by agricultural fields (27° 26′.207″N; 110 01′.388″W) |
| SJ de Bácum | 27 | 15/12 | 9.1 (6–11) | 8.5 (2–12) | Community surrounded by agricultural fields (27° 30′.797″N; 110° 09′.129″W) |
| Campo 47a | 22 | 12/10 | 9.7 (7–11) | 8.7 (2–11) | Rural community surrounded by agricultural fields (27° 20′.540″N; 110° 05′.275″W) |
| Tobarito | 13 | 7/6 | 9.6 (6–12) | 8.4 (4–11) | Community surrounded by agricultural fields (27° 21′.562″N; 109° 53′.862″W) |
| Cd. Obregón | 12 | 7/5 | 9.4 (7–12) | 9.5 (7–12) | Community adjacent to agricultural fields (27° 26′.206″ N; 109° 55′.672″W) |
| Etchojoa | 19 | 11/8 | 7.3 (6–10) | 7.5 (4–9) | Community surrounded by agricultural fields (26° 54′.836″N; 109° 37′.779″W) |
| Villa Juárez | 17 | 10/7 | 9.8 (6–12) | 8.7 (2–12) | Community surrounded by agricultural fields (27° 07′.387″N; 109° 51′.060″W) |
| Navojoa | 17 | 11/6 | 9.6 (6–12) | 8.8 (6–12) | Community adjacent to agricultural fields (27° 05′.074″N; 109° 27′.249″W) |
a
A community with a population <2,500 residents is considering “rural” according to National Institute of Statistics Geography and Informatics criteria