Table 2.
Mean mortality of and 50% and 90% knockdown times (in minutes) (KDT50 and KDT90) of female Anopheles arabiensis in populations from eastern and central Sudan in response to DDT exposure.
| Population | No. | Mortalities % (95% CI) | KDT50 (95% CI) | KDT90 (95% CI) |
|---|---|---|---|---|
| Sennar | 320 | 39.7 (19.8 - 59.53)b | 42.3 (22.5 - 62.2) | 77.1 (25.89 - 128.3) |
| Mayirno | 110 | 49.0 (47.8 - 50.18)ab | 62.8 (43.5 - 82.2) | 97.8 (78.4 - 117.1) |
| Damazin | 300 | 39.0 (19.1 - 58.86)b | 45.7 (34.5 - 70.0) | 79.5 (71.2 - 93.1) |
| Khartoum | 200 | 94.5 (93.3 - 95.68)a | 30.4 (26.8 - 33.8) | 53.9 (47.2 - 65.7) |
| Kosti | 300 | 73.3 (53.5 - 93.2)ab | 73.8 (70.3 - 77.3) | 102.7 (32.8 - 172.7) |
| Al Shuwak | 140 | 67.1 (66.0 - 68.32)ab | 60.4 (35.5 - 85.3) | 98.2 (73.8 - 123.1) |
Columns not connected by the same letter are significantly different at a level of P <0.05 (Tukey-Kramer HSD test).