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Table 3 Ovarian development and blood digestion in Anopheles albimanus surviving 4 days after feeding on cattle

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)
 Fully gravid 78 ± 14% 80 ± 16% 91 ± 7% 78 ± 16% 86 ± 8%
 Complete blood meal digestion 91 ± 10% 100% 91 ± 7% 93 ± 10% 99 ± 7%
 No. mosquitoes dissected N = 32/n1 = 27, n2 = 5 N = 25/n1 = 12, n2 = 13 N = 64/n1 = 29, n2 = 35 N = 27/n1 = 11, n2 = 16 N = 80/n1 = 40, n2 = 40
Fipronil-treated heifers (n = 3)
 Fully gravid 83 ± 15% a
N = 2/n1 = 2, n2 = 0, n3 = 0
0% 0% 25 ± 6%
 Complete blood meal digestion 96 ± 8% 100% 100% 100%
 No. mosquitoes dissected N = 23/n1 = 7, n2 = 7, n3 = 9 N = 7/n1 = 0, n2 = 4, n3 = 3 N = 11/n1 = 1, n2 = 3, n3 = 7 N = 165/n1 = 47, n2 = 53, n3 = 65
Ivermectin-treated heifer (n = 1)
 Fully gravid 50% 50% 50% a
N = 2
60%
 Complete blood meal digestion 75% 75% 63% 90%
 No. mosquitoes dissected N = 4 N = 4 N = 8 N = 77
  1. aToo few (N = 2) mosquitoes survived engorgement to make meaningful estimates. N = total number of surviving mosquitoes dissected within a treatment group; n = number of surviving mosquitoes dissected per heifer within a treatment group. Complete blood meal digestion was defined as the percentage of mosquitoes without visible evidence of blood in their midguts when excised and examined microscopically 4 days after engorgement. Fully gravid was defined as the percentage of mosquitoes with fully developed Stage V ovaries 4 days after engorgement