Field evaluation of natural human odours and the biogent-synthetic lure in trapping Aedes aegypti, vector of dengue and chikungunya viruses in Kenya

Table 1 Comparisons of mosquito collections by BG sentinel traps baited with feet and trunk odours from volunteer 1, volunteer 2 and carbon dioxide in Kilifi county and from volunteer 2, volunteer 3 and carbon dioxide in Busia county relative to the control (Biogents commercial lure baited BG sentinel trap) trap

Site	Treatment	IRR(95%CI)	P value	Treatment	IRR(95%CI)	P value
Kilifi	Carbon dioxide	0.69(0.16-2.92)	0.602	Carbon dioxide	0.32(0.09-1.10)	0.064
Kilifi	Volunteer 1 trunk odour	0.92(0.22-3.87)	0.906	Volunteer 1 feet odour	0.86(0.25-2.93)	0.790
Kilifi	Volunteer 2 trunk odour	3.99(0.95-16.69)	0.049*	Volunteer 2 feet odour	2.43(0.71-8.29)	0.143
Busia	Carbon dioxide	1.16(0.19 - 6.97)	0.867	Carbon dioxide	1.50(0.28-8.04)	0.627
Busia	Volunteer 2 trunk odour	3.00(0.52-17.61)	0.203	Volunteer 2 feet odour	5.63(1.15-28.30)	0.030*
Busia	Volunteer 3 trunk odour	1.10(0.18 -6.67)	0.909	Volunteer 3 feet odour	2.87(0.57-14.80)	0.192

Estimated incidence rate ratio (IRR); confidence interval (CI) and corresponding P-values based on comparison to the BG lure following generalized linear model (GLM) with negative binomial error structure and log link in R 3.1.0 software. The IRR for the control is 1; values above this indicate better performance while values below indicate under performance relative to the control. Asterisks on p values indicate significant difference with the control.

ISSN: 1756-3305