Figure 1.

Vector competence parameters of the mosquito lines Slab, SA2 and SR infected with RVFV (a,c,e) and WNV (b,d,f). At 3, 7, 14 and 21 days after a blood meal containing RVFV or WNV (titre of 10⁷ PFU ml⁻¹ for both RVFV and WNV), mosquitoes were examined for the presence of infectious viral particles detected by titration on Vero cells. The infection rate (a,b) corresponds to the proportion of mosquitoes whose bodies (thorax and abdomen) contain infectious viral particles among infected mosquitoes; the dissemination rate (c,d) is the proportion of females with infected head tissues among mosquitoes presenting infection in their bodies and the transmission efficiency (e,f) corresponds to the proportion of mosquitoes whose saliva contains infectious viral particles among all infected mosquitoes. The number of mosquitoes analysed is indicated in brackets. Error bars represent the 95% confidence interval. Tests of significance were corrected for multiple testing using the Bonferroni procedure. Only tests with significant difference are represented. Asterisks indicate the significance level: *p < 0.05; **p < 0.01; ***p < 0.001.