Table 2 Distribution of anopheline and culicine larvae in breeding habitats at baseline and during the larviciding intervention.

From: High efficacy of microbial larvicides for malaria vectors control in the city of Yaounde Cameroon following a cluster randomized trial

 

Baseline

Intervention

Percent reduction +

Non-intervention area

Intervention area

Non-intervention area

Intervention area

Total of aquatic habitats

Checked

8313

8633

25,729

137,120

 

Total number of water bodies with anopheline larvae (%) (95% CI)

1551 (18.66%)

(17.74–19.61)

1150 (13.32%)

(12.56–14.11)

1934 (7.52%)

(7.18–7.85)

1102 (0.80%)

(0.76–0.85)

85.46*

Total number with late instar anopheline larvae (%) (95% CI)

1096 (70.66%)

(66.54–74.97)

772 (67.13%)

(62.48–72.04)

1155 (59.72%)

(56.33–63.27)

168 (15.24%)

(13.03–17.73)

73.13*

Total number of water bodies with culicine larvae (%) (95% CI)

1528 (18.38%)

(17.47–19.33)

1773 (20.54%)

(19.59–21.52)

2523 (9.80%)

(9.42–10.19)

5538 (4.03%)

(3.93–4.14)

69.24*

  1. + Percent reduction = 100 − (Non LCI at baseline/LCI at baseline × LCI during intervention/non-LCI during intervention) × 100.
  2. (Non-larviciding intervention area (Non LCI), Larvicidng Intervention area (LCI)): *P ≤ 0.001.
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