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Table 1 Proportion (± 95% confidence interval) of wild-caught Anopheles albimanus that ingested blood when exposed to 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

Treatment Number of heifers Pre-treatment Day after treatment
Day 2 Day 5 Day 7 Day 14
Control 2 43 ± 9%
N = 108/n1 = 48, n2 = 60
54 ± 10%
N = 100/n1 = 50, n2 = 50
62 ± 9%
N = 120/n1 = 60, n2 = 60
68 ± 11%
N = 71/n1 = 36, n2 = 35
79 ± 6%
N = 192/n1 = 96, n2 = 96
Fipronil 3 51 ± 8%
N = 144/n1 = 48, n2 = 48, n3 = 48
47 ± 8%
N = 150/n1 = 50, n2 = 50, n3 = 50
65 ± 7%
N = 176/n1 = 58, n2 = 58, n3 = 60
71 ± 9%
N = 102/n1 = 34, n2 = 34, n3 = 34
74 ± 5%
N = 288/n1 = 96, n2 = 96, n3 = 96
Ivermectin 1 37%
N = 48
24%
N = 50
40%
N = 57
51%
N = 33
85%
N = 96
Statistical comparisons Control vs. fipronil χ2 = 1.91
p = 0.17
χ2 = 1.07
p = 0.30
χ2 = 0.25
p = 0.62
χ2 = 0.18
p = 0.67
χ2 = 1.38
p = 0.24
Control vs ivermectin χ2 = 0.36
p = 0.60
χ2 = 12.2
p = 0.0005
χ2 = 7.7
p = 0.006
χ2 = 2.49
p = 0.11
χ2 = 1.90
p = 0.17
  1. N total number of mosquitoes exposed to a treatment group; n number of mosquitoes exposed per heifer within a treatment group