Table 2. Estimated vectorial capacity of Anopheles gambiae mosquitoes in forested and deforested areas, western Kenyan highland and lowland*.

Site	Land use type	m	a	N	P	Vectorial capacity
Highland	Forested	3.05	0.198	13.9	0.927	0.54
Highland	Deforested	4.64	0.233	12.8	0.917	0.96
Lowland	Deforested	7.85	0.465	11.7	0.923	8.30

*m, relative density of vectors in relation to humans; a, average no. children bitten by 1 mosquito in 1 day; n, duration of sporogony in days; P, proportion of vectors surviving per day. See text for details on data source and assumptions made for calculating each variable.