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Table 8 Supplementary experimental hut results for percentage mortality and blood-feeding, 13-16 months after spraying

From: Long-lasting control of Anopheles arabiensis by a single spray application of micro-encapsulated pirimiphos-methyl (Actellic® 300 CS)

Time after spraying Outcome measures Untreated (Mud) CS-B (Concrete) CS-BM (Concrete) CS-B (Mud) CS-BM (Mud) EC (Mud)
13 Months (EC Walls & Ceiling Covered) Total Caught 92 181 204 143 170 115
  % Mortality 1 65 67 78 74 29
  95% CI (1 to 6) (51 to 77) (45-83) (63-88) (61-83) (13-51)
  % Blood-fed 94 32 30 19 38 63
  % BFI - 66 68 80 60 33
15-16 Months (Ceiling Uncovered) Total Caught 411 592 870 576 685 629
  % Mortality 5 34 42 48 63 43
  95% CI (2-12) (27-42) (33-51) (36-59) (46-77) (31-55)
  % Blood-fed 59 48 53 51 42 52
  % BFI - 19 10 14 29 12
15-16 Months (Ceiling Covered) Total Caught 303 557 455 390 498 580
  % Mortality 7 48 49 49 53 46
  95% CI (3-15) (41-55) (38-60) (38-59) (41-64) (37-55)
  % Blood-fed 69 47 46 51 45 54
  % BFI - 32 33 26 35 22
  1. During month 13 the walls and ceiling of the hut sprayed with p-methyl EC were covered with plastic sheeting. Between months 15 and 16 the treated walls of every hut were covered with plastic sheeting for one out of every two weeks. Data are grouped according to whether the walls were covered or uncovered. BFI = blood-feeding inhibition compared to untreated control.