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Table 1 Larval bioassays with Bacillus thuringensis israelensis against Aedes aegypti and Ae. albopictus larvae

From: Susceptibility profile and metabolic mechanisms involved in Aedes aegypti and Aedes albopictus resistant to DDT and deltamethrin in the Central African Republic

Strain and site

n

LC50 (mg/l) (95% CI)

LC95 (mg/l) (95% CI)

RR50

RR95

Ae. aegypti

 IPB

500

0.06 (0.05–0.08)

0.27 (0.22–0.38)

0.85

1.58

 Sica 1

500

0.07 (0.04–0.09)

0.25 (0.20–0.35)

1.00

1.47

 Lakouanga

500

0.15 (0.12–0.16)

0.30 (0.26–0.42)

1.85

1.57

 Ouango

498

0.06 (0.05–0.09)

0.25 (0.20–0.37)

0.85

1.47

 Ngongonon 3

500

0.08 (0.06–0.10)

0.27 (0.22–0.36)

1.14

1.58

 92 Logements

na

  

Ae. albopictus

 IPB

500

0.09 (0.06–0.12)

0.21 (0.18–0.23)

1.28

1.23

 Sica 1

500

0.08 (0.05–0.10)

0.27 (0.22–0.37)

1.14

1.58

 Lakouanga

500

0.11 (0.07–0.16)

0.26 (0.21–0.32)

1.57

1.52

 Ouango

500

0.07 (0.05–0.09)

0.23 (0.19–0.30)

1.00

1.35

 Ngongonon 3

500

0.10 (0.07–0.11)

0.2 (0.20–0.27)

1.42

1.17

 92 Logements

na

  

Reference strain

500

0.07 (0.05–0.08)

0.17 (0.15–0.21)

  
  1. Abbreviations: na not available; LC50 and LC95, 50 and 95% lethal concentrations; CI Confidence interval, RR Resistance ratio