Table 3 Directly measured and adjusted biting rates for Anopheles gambiae sensu lato in indoor residual spraying and control communities during the rainy season
Description | IRS communities | Control communities |
|---|---|---|
Directly measured biting rate of An. gambiae sensu lato | ||
Mean biting rates per night (b/p/n): (đɱhbr) | 10.9 | 17.6 |
Mean biting rates per month (b/p/m) | 337.9 | 545.6 |
Indoor/outdoor bite ratio | 0.94 | 1.14 |
Proportion of bites occurring before 10:00 pm (indoors/outdoors) | 7.2/7.9% | 10.2/8.8% |
HBO-adjusted biting rate of An. gambiae sensu lato | ||
Total HBO-adjusted bites (b/p/n): (ћβt) | 10.0 | 20.0 |
HBO- and parity-adjusted biting rate of An. gambiae sensu lato | ||
Total HBO and parity-adjusted per night (b/p/n): (ћβp) | 4.2* | 14.6 |
Total HBO and parity-adjusted per month (b/p/m) | 130.9 | 451.5 |
Proportion of bites occurring before 10 pm (in/out) | 2.9/40.7% | 8.4/30.6% |
Proportion of bites prevented based on HBO and parity-adjusted biting rate for ITN users: [(ћβt) − (ћβp)]/(ћβt) | 58.1%* | 27.0% |
Degree of over-estimation (difference between HBO- and parity-adjusted and directly measured biting rates: [(đɱhbr)-(ћβp) ]/(đɱhbr) | 61.5% | 17.0% |