Table 4 The number of P. argentipes collected in sprayed, sentinel and control households in pre- and post-IRS weeks during DDT-IRS and SP-IRS rounds. Percentage reduction calculated in sprayed and sentinel households compared with control households
Type | Weeks | P. argentipes count at intervention and control sites | Post-intervention reduction | |||
|---|---|---|---|---|---|---|
Sprayed households Mean (95% CI) | Sentinel households Mean (95% CI) | Control households Mean (95% CI) | Sprayed households (%) | Sentinel households (%) | ||
DDT (WP 50%) at 1 g/m2 | ||||||
 Pre-IRS DDT | 2 | 14.2 (1–28) | 11.8 (2–25) | 12.3 (2–14) | – | – |
 Date of IRS | 25.06.15 | |||||
 Post-IRS DDT | 2 | 6.2 (5–14) | 8.3 (1–17) | 9.2 (8–20) | − 34.1 | − 2.8 |
4 | 6.5 (1–14) | 7.7 (1–15) | 8.3 (1–18) | − 25.9 | − 1.4 | |
12 | 9.5 (1–16) | 10.3 (2–22) | 9.7 (9–20) | − 14.1 | 9.9 | |
SP (WP 5%) at 25 mg/m2 | ||||||
 Pre-IRS SP | 2 | 10.5 (1–21) | 9.2 (1–22) | 7.8 (1–17) | – | – |
 Date of IRS | 22.04.16 | |||||
 Post-IRS SP | 2 | 0.0 (0–0) | 3.7 (1–8) | 6.8 (3–12) | − 90.5 | − 49.1 |
4 | 2.3 (2–5) | 6.2 (5–12) | 6.7 (5–13) | − 66.7 | − 20.0 | |
12 | 8.5 (3–15) | 13.3 (2–27) | 11.7 (1–22) | − 55.6 | 3.6 | |