Table 1. Demography, geography, and human resources in the 12 study areas in Guatemala, El Salvador, and Honduras.

	Guatemala				El Salvador				Honduras
Department	Santa Rosa	El Progreso	Jutiapa	Jalapa	Santa Ana	Ahuachapán	Usulután	Sonsonate	Ocotepeque	Copán	Intibucá	Lempira
Municipality	Nueva Santa Rosa	Morazán	Comapa	San Pedro Pinula	Masahuat	Atiquizaya	Ozatlán	Acajutla	Nueva Ocotepeque	Copán Ruinas	Dolores	Santa Cruz
Health center	Ojo de Agua	Morazán	Comapa	San Pedro Pinula	Masahuat	Atiquizaya	Ozatlán	Metalio	San José de la Reunión	Rincón del Buey	Dolores	Santa Cruz
Population	2,384	12,228	28,991	43,092	5,499	33,579	12,733	13,326	1,160	5,053	5,600	6,857
Number of households	749	3,018	4,934	9,132	1,480	8,699	3,999	4,338	140	865	1,100	1,245
Number of villages
total	1	80	62	21	23	106	41	36	6	13	19	33
with history of T. dimidiata	1	35	62	21	20	75	17	36	6	11	19	12
with history of R. prolixus	0	0	4	17	0	0	0	0	6	3	8	5
with vehicle access	1	75	58	21	23	106	41	36	6	10	19	27
Geography
Area of jurisdiction (km2)	6	31	132	85	71	40	50	66	14	34	82	150
Distance from health center to departmental capital (km)	22	31	40	20	42	12	12	20	17	123	50	65
Number of health personnel
Physicians	1	1	5	7	3	7	3	3	0	1	1	1
Nurses	0	12	3	29	6	19	4	6	1	1	2	3
Laboratory technicians	0	1	1	1	1	3	1	0	0	0	0	0
Vector control technicians	1 a	2 b	5	4 b	0	1	2 b	2 b	0	0	0	0
Other operational technicians	1 a	1	6	6	10	30	11	19	1 a	1 b	1	1 b
Vector control & operational technicians (total) c	1	2	11	8	10	31	12	21	0.5	0.5	1	0.5
Community health volunteers	5	4	25	28	20	186	64	36	30	26	48	43
Community sprayers	0	0	17	0	10	12	2	22	6	11	10	20

^a Technicians assigned to another local health center covered the health centers in the study areas by regular visits.

^b Technicians assigned to the departmental office covered the health centers in the study areas by regular visits.

^c Technicians not directly assigned to the health centers (a and b) were counted as 0.5 persons.