Table 2 |
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|
Knockdown times (KDTs) for Anopheles gambiae s.l. in The Gambia after exposure to different insecticides. |
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|
Insecticide |
Study site |
n@ |
KDT50 (CL#) |
KDT95 (CL#) |
|
|
||||
|
DDT (4%) |
Brikama |
166 |
26.1 (17.0–34.1) |
68.3 (67.9–148.9) |
|
Essau |
80 |
46.1 (42.4–50.8) |
126.6 (102.1–174.3) |
|
|
Farafenni |
80 |
28.7 (26.3–30.8) |
63.9 (56.9–75.1) |
|
|
Mansakonko |
22 |
30.1 (25.5–34.2) |
64.3 (53.1–92.3) |
|
|
Kuntaur |
39 |
22.7 (20.1–25.1) |
47.0 (41.2–56.7) |
|
|
Basse |
25 |
28.6 (24.6–32.5) |
67.5 (55.4–93.4) |
|
|
Permethrin (0.75%) |
Brikama |
150 |
27.6 (21.6–31.8) |
52.3 (47.8–74.7) |
|
Essau |
63 |
14.3 (10.9–17.3) |
85.0 (64.5–132.0) |
|
|
Farafenni |
76 |
6.9$ |
54.7$ |
|
|
Mansakonko |
18 |
15.0 (10.9–18.6) |
42.6 (33.6–63.2) |
|
|
Kuntaur |
41 |
1.0* |
17.2* |
|
|
Basse |
19 |
9.2 (5.2–11.8) |
21.9 (16.9–40.7) |
|
|
Deltamethrin (0.05%) |
Brikama |
155 |
25.1 (17.1–32.1) |
67.8 (64.0–131.4) |
|
Essau |
66 |
10.8 (9.4–12.0) |
21.7 (18.9–26.7) |
|
|
Farafenni |
88 |
8.3 (6.6–9.6) |
18.7 (16.2–23.6) |
|
|
Mansakonko |
22 |
5.6* |
16.8* |
|
|
Kuntaur |
38 |
3.3 (0.2–6.8) |
24.3 (16.8–50.6) |
|
|
Basse |
20 |
16.3 (12.7–19.5) |
41.3 (33.9–55.8) |
|
|
|
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|
@ Total number of mosquitoes exposed to each insecticide. # 95% confidence limits $ The linear log-time probit model is not a good fit to the data in this case. Therefore the estimates of KD50 and KD95 are unlikely to be accurate and the confidence limits could not be estimated * Lower and upper confidence limits could not be estimated due to large g value [25] |
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|
Betson et al. Malaria Journal 2009 8:187 doi:10.1186/1475-2875-8-187 |
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