Table 2.
Summary results of the bioassays with deltamethrin 0.05%
| Taxa | N a | % Mortalityb | % KDc | KDT50d | Statuse |
|---|---|---|---|---|---|
| An. scanloni (laboratory strain) | 50 | 100 (na) | 100 (na) | 19.6 (18.4–20.7) | S |
| An. minimus (s.s.) (laboratory strain) | 50 | 100 (na) | 100 (na) | 10.4 (9.4–11.4) | S |
| An. annularis (s.l.) | 40 | 100 (na) | 100 (na) | 14.4 (13.1–15.6) | S |
| An. barbirostris (s.l.) | 504 | 72 (68–76) | 85 (82–88) | 30.5 (28.7–32.4) | R |
| An. hyrcanus (s.l.) | 172 | 33 (26–40) | 27 (20–33) | 131.3 (83–378.1) | R |
| An. jamesii (s.l.) | 111 | 87 (81–94) | 97 (94–100) | 14 (11.7–16.2) | R |
| An. kochi | 43 | 98 (93–100) | 100 (na) | 14.6 (13–16) | S |
| An. maculatus (s.l.) | 280 | 85 (81–89) | 89 (85–93) | 18.8 (15.8–21.6) | R |
| An. minimus (s.l.) | 370 | 92 (89–94) | 99 (98–100) | 15.4 (14.3–16.5) | SR |
| An. tessellatus | 83 | 98 (94–100) | 99 (96–100) | 17.7 (16.6–18.8) | S |
| An. vagus | 148 | 75 (68–82) | 95 (91–98) | 21.3 (19–23.4) | R |
a N: number of mosquito phenotyped
b % Mortality: mortality rate (expressed in %) after 1 h of exposure to insecticide, recorded following a 24 h observation period; the values between parentheses indicate the 95% confidence interval of the mean mortality rate
c % KD: rate of mosquitoes “knocked down” (KD, expressed in %) recorded after 1 h of exposure to insecticide; the values between parentheses indicate the 95% confidence interval of the mean KD rate
d TKD50: time (expressed in minutes) necessary to “knock down” 50% of the mosquitoes; the values between parentheses indicate the 95% confidence interval of the TDKD50
e Status: resistance status as defined by WHO [37]. Briefly, a mortality in the range 98–100% indicates susceptibility; a mortality between 90 and 97% indicates suspected resistance; a mortality < 90% indicates confirmed resistance as long as 100 specimens have been phenotyped
Abbreviations: na, not applicable; R, resistant; S, suceptible; SR, suspected resistance