Table 2.

Mosquito characteristics and sporozoite status of specimens caught in exit traps in Bioko in 2004

Molecular form and kdr status	% (N)	Sporozoite rate
		% Pf (n)	Odds ratio [95% CI]
Total A. gambiae	100 (4,500)	2.6 (119)
Kdr*
Homozygous susceptible (SS), %	45 (1,741)	2.4 (42)	1
Heterozygous (SRw), %	41 (1,564)	4.4 (69)	1.9 [0.91–3.8], P = 0.090
Homozygous resistant (RwRw), %	14 (543)	1.1 (6)	0.45 [0.25–0.83], P = 0.01
Molecular form
M form, %	36 (1,495)	2.1 (31)	1
S form, %	64 (2,700)	3.3 (88)	1.6[0.98–2.6], P = 0.061

^*Seven specimens were heterozygous for the east African variant of kdr SRe, and 5 were ReRw (all sporozoite negative). For 640 specimens, no kdr status was available (all SEs adjusted for between cluster differences).