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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)