Skip to main content

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.