TABLE 2.
Types of water sources and their relative importance in guinea worm transmission in Dara village, Burkina Fasoa
| Characteristic | Draw wells | Periodic streams | Large natural ponds | Cattle waterings | Small natural ponds | Small human-made ponds |
|---|---|---|---|---|---|---|
| Diam (m) | 2 | 10 | 50-200 | 17-45 | 7-15 | 4-9 |
| Maximum depth (cm) | Up to 500 | 250 | 100-130 | 45-80 | 25-30 | 30-55 |
| Potential focus? | No | No | Yes | Yes | Yes | Yes |
| No. found and studied | 4 | 4 | 4 | 8 | ||
| No. of guinea worm patients regularly using them | 9 | 2 | 5 | 90 | ||
| % | 8.5 | 1.9 | 4.7 | 84.9 |
a
Adapted from reference 147 with permission of Taylor & Francis Ltd.