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Table 2 Median survival in days of wild-caught Anopheles albimanus fed on treated and untreated heifers (Belize 2018)

From: Fipronil and ivermectin treatment of cattle reduced the survival and ovarian development of field-collected Anopheles albimanus in a pilot trial conducted in northern Belize

 

Pre-treat

Day 2

Day 5

Day 7

Day 14

Untreated heifers (n = 2)

 Mosquito survival (days)

> 4* (n = 46)

4 (n = 54)

> 4* (n = 75)

> 4* (n = 48)

> 4* (n = 151)

Fipronil-treated heifers (n = 3)

 Mosquito survival (days)

> 4* (n = 74)

1 (n = 73)

1 (n = 115)

1 (n = 72)

> 4* (n = 213)

 Statistical significance**

χ2 = 96.8; p < 0.0001

χ2 = 150.7; p < 0.0001

χ2 = 23.7; p < 0.0001

χ2 = 19.6; p < 0.0001

Ivermectin-treated heifer (n = 1)

 Mosquito survival (days)

> 4 (n = 18)

3 (n = 12)

4 (n = 23)

2 (n = 17)

> 4* (n = 82)

 Statistical significance**

χ2 = 4.2; p = 0.04

χ2 = 27.1; p < 0.0001

χ2 = 11.7; p = 0.0006

χ2 = 0.08; p = 0.78

  1. * Median mosquito survival exceeded the 4 day observation period; n = total number of engorged mosquitoes
  2. ** The χ2 and p-values compare survival curves of the treated groups with that of the corresponding untreated control group, as determined by Logrank tests