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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

From: Interruption of Onchocerca volvulus transmission in Northern Venezuela

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)
  1. ψThe associated 95% Confidence Intervals (CIs) surrounding the point estimate.
  2. γSBD: Mean number (geometric mean) of S. metallicum bites per person per season.
  3. δNumber of positive (heads) for O. volvulus L3 per 2 000 flies examined.
  4. θSTP: SBD x prevalence of infective flies x mean number of L3 per infective fly.