Table 3 Results obtained for Anopheles arabiensis (n = 42 nights) in the experimental huts in Moshi

Initial dose of permethrin

0 mg/m²

0 mg/m²

2000 mg/m²

2000 mg/m²

500 mg/m²

500 mg/m²

1000 mg/m²

Number of washes

0

5

0

5

0

5

0

% volunteer body cover (95% CI)

81 (77–85)

83 (80–87)

79 (74–83)

78 (73–82)

79 (72–85)

79 (72–85)

100

Total females caught

192

205

224

237

240

197

288

Females caught/night

5

5

5

6

6

5

7

Total females in verandah and exit traps

155

170

194

210

203

169

258

Exophily (%)

81^ad

83^d

87^abd

89^abc

85^acd

86^acd

90^c

95% Confidence limits

73-86

70-91

80-91

82-93

79-89

79-91

83-94

Total females blood fed

67

85

56

50

48

54

51

Blood fed (%)

35^ab

41^a

25^bc

21^cd

20^cd

27^bc

18^d

95% Confidence limits

26-45

33-50

19-32

17-26

14-28

16-42

13-24

Blood feeding inhibition (%)

-

-

29

49

43

34

49

Total females dead

4

3

59

53

70

53

90

Overall mortality (%)

2^a

1^a

26^bc

22^b

29^bc

27^bc

31^c

95% Confidence limits

1-5

0-5

19-36

15-31

21-39

21-34

24-39

Corrected for control (%)

-

0

24

21

27

25

29

Unfed mortality

3 (1–8)

3 (1–8)

30 (20–41)

23 (16–32)

31 (21–43)

30 (23–38)

32 (24–43)

Blood fed mortality

0

0

16 (7–32)

20 (9–39)

21 (11–36)

19 (12–28)

25 (14–42)