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Table 1 Mortality rates (95% confidence interval) and blood-feeding status of Anopheles gambiae s.l from various localities exposed to lambdacyhalothrin 0.05% in WHO resistance tests

From: High level of resistance in the mosquito Anopheles gambiae to pyrethroid insecticides and reduced susceptibility to bendiocarb in north-western Tanzania

Date of testing Village Total tested Replicate no.  % mortality (95%CI) % blood-fed Anopheles Kdr allele frequency
May 2011 Kikagate 35 2 34% (19–52) 100% 95%
  Kyamyorwa 230 12 40%3 (33–46) 70% 100%
Nov 2011 Kishuro 40 2 13% (4–27) 24% 99%
  Ngenge 52 3 25% (14–39) 59% 99%
  Rwigembe 42 2 31% (18–47) 84% 100%
  Buhuma 30 2 17% (6–35) 78% 100%
  Kangoma 105 6 8%1 (3–14) 40% 96%
  Kikagate 142 7 8% (4–14) 74% 98%
  Kiteme 104 6 31%2 (22–41) 92% 99%
  Kyamyorwa 149 7 26%3 (19–34) 75% 98%
  Nyakahama 13 1 38% (14–68) 77% 100%
  Buhanga 36 2 22%3 (10–39) 86% 98%
  Kimbuga 21 2 0% (0–16) 43% 94%
  Kisumu strain 100 4 100% (96–100)   
  1. The allelic frequency of the kdr east mutation among An. gambiae s.s is reported separately for each village.
  2. 1Control mortality was 2%, 23% and 34% in the test indicated with a subscript and was 0% in all the other tests.