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Table 2 Comparison of Olyset and alphacypermethrin treated nets against Anopheles gambiae in experimental huts.

From: An experimental hut evaluation of Olyset® nets against anopheline mosquitoes after seven years use in Tanzanian villages

 

Untreated net

New alphacypermethrin

1.5 year alphacypermethrin

New Olyset

7 year Olyset

Total females caught

112

93

138

177

165

Females caught/night

1.9a

1.5a

2.3a

2.9a

2.7a

% Inside net

8.9a

1.1b

0.7b

0b

0b

% In veranda and exit traps (95% C.I.)

91.1a (85.8 – 96.4)

94.6ab (90.0 – 99.2)

97.1b (94.3 – 99.9)

98.3b (96.4 – 100.2)

97.0b (94.5 – 99.6)

% Insecticide induced exophily

-

39.3

67.5

81.0

66.1

% Blood fed (95% C.I.)

26.8a (18.6 – 35.0)

8.6b (2.9 – 14.3)

18.8ab (12.3 – 25.4)

15.8b (10.4 – 21.2)

49.5c (40.9 – 56.1)

% Blood feeding inhibition

-

67.9

29.9

40.9

0

% Mortality (95% C.I.)

3.6a (0.13 – 7.0)

72.0bc (62.9 – 81.2)

69.6c (61.9 – 77.2)

62.7b(55.8 – 69.8)

40.0d (32.5 – 47.5)

% Mortality (corrected for control)

-

71.0

68.4

61.3

37.9

  1. Numbers in the same row sharing a letter superscript do not differ significantly (P > 0.05)