Table 3.
Total number of parous and examined Simulium ochraceum s.l., the percentage of parous flies, the number of infected flies, and the prevalence of infection (with any Onchocerca volvulus larval stage) per 1,000 parous flies detailed by village and coffee finca for each of the study in the Southern Chiapas focus, Mexico
| Locality Village Coffee finca | N° of flies parous/examined (% parous) | No. of infected flies No. per 1,000 parous flies (95% CI) | N° of flies parous/examined (% parous) | No. of infected flies No. per 1,000 parous flies (95% CI) |
| Planting-clearing season of May-Jul 1997 | Harvesting season of Nov 1997-Feb 1998 | |||
| Locality I | ||||
| Las Golondrinas | 2,636/3,017 (87.4) | 5 1.9§ (0.6–4.4) | 2,055/2,636 (78.0) | 0 0§ (0–1.8) |
| Rosario Zacatonal | 2,788/3,384 (82.4) | 2 0.7 (0.1–2.6) | 2,907/3,947 (73.7) | 2 0.7 (0.1–2.5) |
| Finca Palestina | 3,538/4,115 (86.0) | 7 2.0a,c (0.8–4.1) | 4,834/6,786 (71.2) | 1 0.2a,d (0–1.2) |
| Locality II | ||||
| Nueva América | 828/956 (86.6) | 2 2.4 (0.3–8.7) | 967/1,534 (63.0) | 1 1.0 (0–5.7) |
| Fincas Victoria, Santa Fé and Fortuna | 555/625 (88.8) | 5 9.0b,c (2.9–20.9) | 2,540/3,341 (76.0) | 5 2.0b,d (0.6–4.6) |
| Planting-clearing season of May-Jul 1998 | Harvesting season of Nov 1998-Feb 1999 | |||
| Locality I | ||||
| Las Golondrinas | 1,483/2,098 (70.7) | 0 0 (0–2.5) | 2,591/3,983 (65.1) | 0 (0–1.4) |
| Rosario Zacatonal | 548/874 (62.7) | 0 (0–6.7) | 384/581 (66.1) | 1 2.6 (0.1–14.4) |
| Finca Palestina | N/A | N/A | 2,304/3,915 (58.9) | 2 0.9 (0.1–3.1) |
| Locality II | ||||
| Nueva América | 681/1,032 (66.0) | 4 5.9§ (1.6–15.0) | 3,254/4,957 (65.6) | 5 1.5§ (0.5–3.6) |
| Fincas Victoria, Santa Fé and Fortuna | 561/693 (81.0) | 1 1.8 (0–9.9) | 3,898/6,348 (61.4) | 8 2.1 (0.9–4.0) |
a, b, c, d Denote statistical significance (p < 0.05) with the same letter indicating the comparison under scrutiny.
§ Indicates borderline significance (p = 0.05).