Skip to main content

Table 4 Indoor resting density, parity rate, sporozoite rate and human blood meal index of Anopheles gambiae s.l. separated into dry (February, April, December) and rainy (June, August, October) seasons collected from village clusters with each LLIN intervention 2014/15

From: A village level cluster-randomized entomological evaluation of combination long-lasting insecticidal nets containing pyrethroid plus PBO synergist in Southern Mali

Dry season Rainy season
Treatment Total resting indoors Collection days Resting density/room/day (95% CI) P value Total resting indoors Collection days Mosquito/room/day (95% CI) P value
Indoor resting density of An. gambiae s.l.
 Permethrin 866 720 1.20 (1.13–1.28) 0.001 3758 720 5.22 (5.15–5.29) 0.001
 Permethrin + PBO 1452 720 2.02 (1.94–2.09) 3883 720 5.39 (5.32–5.47)
 Deltamethrin 391 720 0.54 (0.47–0.62) 0.001 2375 720 3.30 (3.23–3.37) 0.001
 Deltamethrin + PBO 981 719 1.36 (1.29–1.44) 3404 720 4.73 (4.66–4.80)
Dry season Rainy season
Treatment Number dissected Number parous Parity rate (95% CI) P value Number dissected Number parous Parity rate (95% CI) P value
Parity rate of An. gambiae s.l.
 Permethrin 370 300 81.1 (77.1–85.1) 0.15 1207 942 78.0 (75.7–80.4) 0.18
 Permethrin + PBO 480 370 77.1 (73.3–80.8) 951 719 75.6 (72.9–78.3)
 Deltamethrin 178 162 91.0 (86.8–95.2) 0.01 885 676 76.4 (73.6–79.2) 0.06
 Deltamethrin + PBO net 321 265 82.6 (78.4–86.7) 823 597 72.5 (69.5–75.6)
Dry season Rainy season
Treatment Number tested Number of SPZ+ % sporozoite positive (95% CI) P value Number tested Number of SPZ+ % sporozoite positive (95% CI) P value
Sporozoite rate of An. gambiae s.l.
 Permethrin 319 22 6.90 (4.12–9.68) 0.03 1490 76 5.10 (3.98–6.22) 0.67
 Permethrin + PBO 405 47 11.60 (8.49–14.72) 1301 71 5.46 (4.22–6.69)
 Deltamethrin 257 13 5.06 (2.38–7.74) 0.50 1054 39 3.70 (2.56–4.84) 0.01
 Deltamethrin + PBO 413 26 6.30 (3.95–8.64) 1232 24 1.95 (1.18–2.72)
Dry season Rainy season
LLIN treatment arm Number tested Number human positive % HBI (95% CI) P value Number tested Number positive HBI % HBI (95% CI) P value
Human blood meal index of indoor resting An. gambiae s.l.
 Permethrin 258 124 48.1 (42.0–54.2) 0.17 820 479 58.4 (55.0–61.8) < 0.01
 Permethrin + PBO 289 122 42.2 (36.5–47.9) 590 285 48.3 (44.3–52.3)
 Deltamethrin 186 101 54.3 (47.1–61.5) 0.44 585 296 50.6 (46.5–54.6) 0.195
 Deltamethrin + PBO 327 189 57.8 (52.4–63.2) 556 260 46.8 (42.6–50.9)