Table 5.
Seasonal biting density (SBD), prevalence of infective flies (PIF), and seasonal transmission potential (STP) estimates of S. metallicum in the extra-sentinels communities of the North-east onchocerciasis focus, Venezuela, during 2010 and 2012
| Community | Flies collected | SBDγ (CI)ψ | PIFδ (CI)ψ | STPθ (CI)ψ |
|---|---|---|---|---|
| Manapire Abajo (2010) |
4,208 |
18,856 |
0 (1–0.9) |
0 (1–8.5) |
| Guayabal (2010) |
9,491 |
37,007 |
0 (0–0.4) |
0 (0–7.4) |
| Sabaneta (2010) |
4,135 |
32,764 |
0 (0–0.2) |
0 (0–3.3) |
| Naranjal (2010) |
7,992 |
31,056 |
0 (0–0.5) |
0 (0–7.8) |
| El Filudo (2010) |
5,144 |
21,084 |
0 (0–0.7) |
0 (0–7.4) |
|
Focus (2010) |
30,970 |
39,155 |
0 |
0 |
|
(36,703 – 41,763) |
(0–0.1) |
(0–2.0) |
||
| Guayabal (2012) |
2,411 |
10,281 (9,612–11,700) |
0 (0–1.6) |
0 (0–8.2) |
| Naranjal (2012) | 4,321 | 10,453 (9,256–11,786) | 0 (0–0.9) | 0 (0–4.7) |
ψThe associated 95% Confidence Intervals (CIs) surrounding the point estimate.
γSBD: Mean number (geometric mean) of S. metallicum bites per person per season.
δNumber of positive (heads) for O. volvulus L3 per 2 000 flies examined.
θSTP: SBD x prevalence of infective flies x mean number of L3 per infective fly.