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Population (number examined), number positive for Onchocerca volvulus mf [prevalence], and mean microfilaridermia (arithmetic mean no. of mf/mg and community microfilarial load) at beginning of coffee planting-clearing and harvesting seasons of 1997–1998 and 1998–1999 in localities I (villages of Golondrinas, Rosario Zacatonal, and finca Palestina), and II (village of Nueva América, and fincas of Victoria, Fortuna, and Santa Fé) in Southern Chiapas, Mexico |
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| Localities |
Residents |
Migrants |
Ratio of migrants to residents |
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|
|
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| Population (Examined) |
Pos [Prev] (95% CI) |
AM mf/mg (CMFL) |
Population (Examined) |
Pos [Prev] (95% CI) |
AM mf/mg (CMFL) |
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|
|
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| Planting season (May-July 1997) |
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| Locality I |
437 (318) |
36 [11.3%] (8.1–15.3) |
0.28 (0.19) |
45 (30) |
7 [23.3%] (9.9–42.3) |
0.78 (0.71) |
0.1 : 1 |
| Locality II |
374 (235) |
34 [14.4%] (10.2–19.6) |
1.27 (0.51) |
350 (204) |
12 [5.9%] (3.1–10.0) |
0.12 (0.08) |
0.9 : 1 |
| Harvesting season (November 1997–February 1998) |
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| Locality I |
385 (250) |
32 [12.8%] (8.9–17.6) |
0.25 (0.14) |
130 (48) |
3 [6.3%] (1.3–17.2) |
0.54 (0.23) |
0.3: 1 |
| Locality II |
350 (198) |
15 [7.6%] (4.3–12.2) |
0.53 (0.22) |
850 (258) |
7 [2.7%] (1.1–5.5) |
0.07 (0.03) |
2.4 : 1 |
| Planting season (May-July 1998) |
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| Locality I |
370 (236) |
30 [12.7%] (8.7–17.6) |
0.18 (0.11) |
N/A |
N/A |
N/A |
N/A |
| Locality II |
350 (61) |
4 [6.6%] (1.8–15.9) |
0.06 (0.05) |
600 (68) |
6 [8.8%] (3.3–18.2) |
0.22 (0.09) |
1.7 : 1 |
| Harvesting season (November 1998–February 1999) |
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| Locality I |
370 (187) |
7 [3.7%] (1.5–7.6) |
0.11 (0.06) |
35 (14) |
2 [14.3%] (1.8–42.8) |
1.58 (0.39) |
0.1 : 1 |
| Locality II |
N/A |
N/A |
N/A |
190 (168) |
9 [5.4%] (2.5–9.9) |
0.26 (0.12) |
N/A |
|
N/A: Data not available. | |||||||
Rodríguez-Pérez et al. Filaria Journal 2007 6:16 doi:10.1186/1475-2883-6-16 |
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