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Table 2 Bioassay results for tests on sample of collected nets, by site and collection time

From: Estimation of insecticide persistence, biological activity and mosquito resistance to PermaNet® 2 long-lasting insecticidal nets over three to 32 months of use in Ethiopia

    Susceptible strain Wild caught
Site No of nets Mean (SD) deltamethrin concentration (mg/m2by XRF) Ave kd30 % Range kd30 % Ave kd60 % Range kd60 % Ave mort24h % Range mort24h % Ave kd30 % Range kd30 % Ave kd60 % Range kd60 % Ave mort24h % Range mort24h %
A 4 69.1 (8.8) 100 100–100 100 100–100 100 100–100       
B 4 71.9 (18.4) 100 100–100 100 100–100 100 100–100       
C 4 67.0 (7.5) 100 100–100 100 100–100 100 100–100       
D 4 65.0 (6.3) 100 100–100 100 100–100 100 100–100       
E 4 45.9 (16.1) 99.4 97.5–100 99.4 97.5–100 96.2 92.3–100       
F 4 50.2 (28.3) 100 100–100 100 100–100 100 100–100       
J 4 59.8 (2.6) 93.8 82.5–100 98.1 92.5–100 96.3 85.0–100       
3–6 months 28 61.3 (16.2) 99.0 82.5–100 99.6 92.5–100 98.9 85.0–100       
K 4 37.1 (11.3) 100 100–100 100 100–100 99.4 97.5–100 94.1 85.9–100 98.4 96.0–100 100.0 100–100
L 4 46.5 (8.7) 95.6 85.0–100 96.9 87.5–100 93.8 87.5–100 90.4 82.5–93.3 98.2 97.5–100 73.7 61.9–95.6
M 4 29.4 (28.1) 97.5 90.0–100 99.4 97.5–100 100 100–100 95.2 90.2–100 97.6 95.0–100 95.7 90.0–100
N 4 52.8 (8.4) 91.1 64.3–100 96.4 85.7–100 92.8 78.6–100 92.6 85.7–97.4 91.7 74.4–100 86.6 67.7–100
P 4 40.3 (20.8) 90.0 60.0–100 91.9 77.5–100 86.3 77.5–100 100 97.5–100 98.1 92.5–100 83.7 66.7–97.6
Q 4 37.5 (20.1) 89.6 63.4–100 98.7 97.6–100 94.5 82.9–100 96.3 95.0–97.6 97.5 95.0–100 92.2 83.4–97.6
R 4 47.2 (31.6) 86.3 50.0–100 93.8 75.0–100 91.7 80.0–100 89.7 78.7–97.5 96.6 91.5–100 96.5 88.8–100
S 4 40.5 (39.7) 78.4 25.6–97.6 93.7 82.1–100 83.3 33.3–100 89.0 70.0–97.7 94.8 84.2–100 93.2 80.6–100
T 4 51.9 (23.8) 90.1 67.5–100 93.2 75.0–100 96.9 87.5–100 93.6 87.8–100 98.1 92.3–100 90.2 73.7–100
U 4 37.6 (17.4) 87.6 70.0–100 95.6 87.5–100 88.2 72.5–100 83.8 50.0–97.6 92.8 80.0–100 91.9 79.0–97.9
J 4 49.5 (21.8) 100 100–100 100 100–100 100 100–100 89.2 59.5–100 94.1 76.3–100 35.3 5.1–42.3
14–20 months 44 42.8 (21.4) 91.4 25.6–100 96.3 75.0–100 93.3 33.3–100 92.2 50.0–100 96.2 74.4–100 85.4 5.1–100
K 4 35.8 (11.1) 100 100–100 100 100–100 98.6 94.3–100 93.8 85.0–100 96.9 90.0–100 61.3 30.0–90.0
L 4 49.8 (6.4) 100 100–100 100 100–100 97.4 94.7–100 90.0 70.0–100 96.9 92.5–100 54.4 45.0–60.0
M 4 73.6 17.7) 100 100–100 100 100–100 97.4 94.7–100 92.8 86.8–97.4 96.7 92.1–100 71.6 62.2–89.2
N 4 34.0 (18.4) 97.5 92.5–100 99.4 97.5–100 88.1 75.0–100 71.7 21.6–95.0 84.9 57.9–100 32.4 15.4–52.5
P 4 47.1 (20.5) 100 100–100 100 100–100 90.1 79.0–100 94.1 86.8–100 95.4 89.5–100 34.5 5.4–56.8
Q 4 43.8 (17.7) 100 100–100 100 100–100 93.9 91.9–94.6 91.3 87.5–97.5 88.8 82.5–95.0 56.9 52.5–62.5
R 4 33.5 (22.4) 100 100–100 100 100–100 89.2 77.1–100 75.0 57.5–92.5 78.8 55.0–95.0 28.1 0.0–50.0
S 4 36.9 (8.2) 98.8 95.0–100 100 100–100 96.6 89.2–100 59.4 32.5–75.0 63.1 35.0–77.5 38.8 15.0–85.0
T 4 37.7 (18.9) 88.1 57.5–100 89.4 62.5–100 89.6 68.4–100 67.5 25.0–92.5 70.6 30.0–100 23.8 12.5–37.5
U 4 58.4 17.1) 100 100–100 100 100–100 100 100–100 98.8 97.5–100 100 100–100 70.6 62.5–77.5
26–32 months 40 45.1 (19.1) 98.4 57.5–100 98.9 62.5–100 94.1 68.4–100 83.4 21.6–100 87.2 30.0–100 47.2 0.0–90.0