Table 2.

Knockdown times and mortality rates for Anopheles gambiae field populations in Ndogpassi, Douala, after exposure to 4% DDT, 0.75% permethrin or 0.05% deltamethrin

Insecticide	N	Knockdown times Kdt50 (95% CI) Min	Kdt95 (95% CI) Min	KdT50R	Mortality
4% DDT	249	226.5 (0.27 – 1849)	520.5 (0.01 – 25442)	12.04	33%
0.75% permethrin	350	110.7 (86.6 – 175)	389.8 (227.6 – 1094)	12	76%
0.05% deltamethrin	158	44.3 (42 – 47.02)	108.6 (94.9 – 129.7)	4.7	98%

N: number of mosquitoes tested, Kd: knockdown times, Bold: resistant populations.

Kdt50R: kdT50 of tested population divided by KdT50 of Kisumu strain.

KdT50: Kd time in minutes for 50% mosquitoes.

KdT95: Kd time in minute for 95% mosquitoes.

Mortality: mortality rate 24 hours post exposure to the insecticide.