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| Use insecticide-treated curtains | |||
| Mean number of sandflies in some houses using treated curtains | Mean number of sandflies in some houses not using treated curtains | ||
| Starting of the study | End of the study (after 12 months) | Starting of the study | End of the study (after 12 months) |
| 34 | 6 | 28 | 29 |
| 15 | 2 | 19 | 19 |
| 8 | <1 | 4 | 5 |
| 18 | 3 | 18 | 19 |
| 9 | 2 | 8 | 9 |
| 7 | 1 | 12 | 12 |
| 37 | 5 | 20 | 20 |
| Source: British Medical Journal, Vol 325, October 12, 2002 | |||