Skip to main content

Table 2 Mortality rates of the Anopheles gambiae s.l field populations from various localities exposed to deltamethrin, permethrin, DDT and bendiocarb

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

Insecticide

Date

Village

Total tested

No. of replicates

 % mortality (95%CI)

% blood-fed Anopheles

Bendiocarb (0.1%)

May 2011

Kyamyorwa

112

6

100%

(97–100)

100%

Nov 2011

Kyamyorwa

106

7

84%1

(76–90)

78%

  

Kangoma

54

3

70%3

(56–82)

86%

  

Kikagate

100

5

86%

(78–92)

65%

  

Kiteme

84

5

90%2

(82–96)

96%

  

Kisumu strain

61

4

97%

(89–100)

 

DDT (4%)

May 2011

Kyamyorwa

98

5

37%

(27–47)

100%

 

Nov 2011

Kyamyorwa

99

5

13%1

(7–21)

88%

  

Rwigembe

8

1

13%

(0–53)

36%

  

Buhuma

12

1

17%

(2–48)

58%

  

Kikagate

20

1

35%

(15–59)

55%

  

Kiteme

85

4

40%2

(30–51)

100%

  

Kisumu strain

100

4

100%

(96–100)

 

Deltamethrin (0.05%)

May 2011

Kishuro

20

1

70%

(46–88)

100%

 

Kyamyorwa

106

5

28%3

(20–38)

100%

Permethrin (0.75%)

Nov 2011

Kiteme

98

5

11%

(6–19)

98%

  1. Proportion of blood-fed Anopheles at the time of the testing is reported.
  2. 1Control mortality was 2%, 23% and 34% in the test indicated with a subscript and was 0% in all the other test.