Table 1.

Comparison of mortality rates and knockdown time among three sources of Anopheles sinensis mosquitoes using the standard WHO deltamethrin resistance bioassay

			Mortality		Knockdown time
Site	Source of mosquitoes	n	Mean (%)*	95% confidence interval	KT50(min)*	95% confidence interval
Anhui (Huainan county)	Field-collected female adults	140	47.6a	42.4 - 52.8	97a	81.2 - 131.5
	Female adults reared from field-collected larvae	240	31.7b	28.7 - 34.7	92a	72.3 - 155.5
	F1 adults from field blood-fed female	141	32.9b	27.9 - 37.9	101a	83.9 - 143.9
Hunan (Liuyang county)	Field-collected female adults	180	24.9a	19.2 - 30.6	104	83.4 - 170.8
	Female adults reared from field-collected larvae	234	15.5b	11.8 - 19.1	—	—
	F1 adults from field blood-fed female	150	15.1b	12.6 - 17.6	—	—
	Laboratory strain	125	99.0	98.6 - 99.4	15	14.7 - 16.1

*For each site, the mortality rate or KT₅₀that shares different letter indicates statistical difference at P < 0.05 using the Duncan multiple range test.

—No mosquitoes were knocked down within the 60-min exposure time, thus KT₅₀ could not be calculated.