Table 4 Evolution of Simulium exiguum (s.l.) infectivity rate, determined by dissection in Naiciona, Colombia, 1996–2001
Year | Method | No. of flies examined | Flies with infective larvae (L3) | Infectivity rate (%) | 95% CI |
|---|---|---|---|---|---|
1996 (baseline) | Dissection | 281 | 3 | 1.07 | 0.3–3.1 |
1998 | Dissection | 286 | 0 | 0 | 0–1.2 |
2001 | Dissection | 3371 | 1 | 0.03 | 7.5 × 10-6–0.2 |