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Table 1 Oocyst prevalence and mean oocyst intensity (number of oocysts/midgut in infected mosquitoes) variation between the study rounds and doses of deltamethrin the mosquitoes were exposed to after infective feeds

From: Effect of environmental variables and kdr resistance genotype on survival probability and infection rates in Anopheles gambiae (s.s.)

Deltamethrin dosea

Study roundb

Oocyst prevalence (%) (95% CI)

Comparison of prevalence between rounds

Mean number of oocysts/midgut (95% CI)

Analysis of variance

Control

1

92.7 (84.2–96.8)

χ2 = 94.14;

P < 0.0001

12.45 (10.00–14.89)

F(2, 252) = 12.32;

P < 0.0001

2

41.2 (23.3–61.8)

2.96 (2.33–3.59)

3

82.7 (67.3–91.8)

8.78 (6.75–10.80)

Low dose

1

79.5 (44.8–94.9)

χ2 = 29.05

P = 0.0020

8.48 (5.95–11.01)

F(2, 67) = 6.42;

P = 0.0028

2

25.8 (18.2–35.2)

1.00 (1.00–1.00)

3

81.6 (72.8–87.9)

5.03 (3.18–6.88)

High dose

1

71.4 (52.9–84.7)

χ2 = 43.23

P = 0.0069

8.55 (6.58–10.51)

F(2, 111) = 11.93;

P < 0.0001

2

23.7 (7.0–56.1)

2.17 (1.37–2.97)

3

60.0 (64.5–82.9)

4.86 (3.55–6.17)

  1. aDeltamethrin dose: Low dose, 2.5–5.0 mg/m2; high dose, 10.0–16.7 mg/m2
  2. bStudy rounds: 1, September-October 2013; 2, November-December 2013; 3, May-June 2014