Table 3.
Diagnostic doses for temephos and permethrin determined using the New Orleans strain
| Population | LC50 (95% CI) | Resistance ratio (RR50) | LC90 (95% CI) | Resistance ratio (RR90) |
|---|---|---|---|---|
| Temephos | ||||
| Colombo | 0.0167 (0.0145–0.0192) | 3.88 | 0.0414 (0.0318–0.0538) | 6.47 |
| Galle | 0.0169 (0.0155–0.0184) | 3.93 | 0.036 (0.031–0.042) | 5.63 |
| Puttalum | 0.0030 (0.0026–0.0033) | 0.69 | 0.0071 (0.006–0.008) | 1.11 |
| Trincomalee | 0.0169 (0.0143–0.0199) | 3.93 | 0.0434 (0.029–0.063) | 6.78 |
| Hambanthota | 0.0112 (0.0103–0.0121) | 2.60 | 0.0210 (0.0179–0.0245) | 3.28 |
| New Orleans | 0.0043 (0.0040–0.0045) | 1.0 | 0.0064 (0.0059–0.0070) | 1.00 |
| Permethrin | ||||
| Colombo | 8.75 (7.84–9.98) | 12.9 | 15.88 (12.52–17.98) | 9.62 |
| Galle | 5.04 (4.23–5.99) | 7.4 | 17.30 (13.10–22.86) | 10.48 |
| Puttalum | 1.80 (1.57–2.05) | 2.6 | 5.13 (3.92–6.72) | 3.11 |
| Trincomalee | 4.42 (3.87–5.05) | 6.5 | 11.42 (8.88–14.69) | 6.92 |
| Hambanthota | 5.84 (5.24–6.52) | 8.6 | 10.52 (8.75–13.49) | 6.38 |
| New Orleans | 0.6783 (0.6078–0.7569) | 1.0 | 1.65 (1.26–2.16) | 1.00 |
Abbreviations: LC, lethal concentration; CI, confidence interval