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Table 2 Results of resistance testing using the WHO tube assay with two to five days old mosquitoes with and without pre-exposure to a synergist, Liwonde, Malawi 2012-2013

From: A cohort study of the effectiveness of insecticide-treated bed nets to prevent malaria in an area of moderate pyrethroid resistance, Malawi

  

Without pre-exposure to PBO a

With pre-exposure to PBO

Mosquito species

Insecticide

% mortality (95% CI) b

% mortality (95% CI)

(No. died/tested)

(No. died/tested)

An. funestus

Deltamethrin 0.05%

38 (29–47) (58/152)

89 (37–100) (34/38)

Permethrin 0.75%

25 (8–42) (23/93)

98 (93–100) (89/91)

An. gambiae s.l.

Deltamethrin 0.05%

53 (24–81) (49/93)

 

Permethrin 0.75%

57 (32–82) (65/114)

100 (90–100) (27/27)

  1. a Mosquitoes with and without pre-exposure to PBO for one hour before resistance testing using the WHO tube assay.
  2. b 95% confidence intervals calculated taking clustering by tube into account.