Table 4.
Susceptibility (based on knockdown time, KT50 KT90) of 13 field-collected C. lectularius populations to topically applied deltamethrin at a discriminating dose of 115 ng per adult.
| Population | n | KT50
(min, 95% CI) |
KT90
(min, 95% CI) |
χ2 (df) | Slope ± SE | % Mean Mortality at 72 h |
* RR50 | RR90 |
|---|---|---|---|---|---|---|---|---|
| Fort Dix | 30 | 27 (24–29) | 47 (43–53) | 4.8 (10) | 5.206 ± 0.467 | 100 | - | - |
| Aberdeen | 30 | >4320 | >4320 | - | - | 17 ± 7 | >160 | >91.9 |
| Bayonne | 30 | 44 (39–48) | 86 (75–105) | 2.0 (9) | 4.294 ± 0.438 | 97 ± 3 | 1.6 | 1.8 |
| Bayonne 2015 | 30 | >4320 | >4320 | - | - | 13 ± 9 | >160 | >91.9 |
| Canfield | 30 | >4320 | >4320 | - | - | 20 ± 6 | >160 | >91.9 |
| Cotton | 30 | 44 (377–52) | >4320 | 4.7 (17) | 1.508 ± 0.166 | 73 ± 9 | 1.6 | >91.9 |
| Dehart | 30 | 24 (21–27) | 55 (47–69) | 2.7 (7) | 3.593 ± 0.394 | 93 ± 3 | 1.0 | 1.2 |
| Hackensack | 30 | 27 (21–34) | 56 (41–120) | 19.3 (7) | 4.015 ± 0.493 | 100 | 1.0 | 1.2 |
| Indy | 30 | 48 (40–64) | >4320 | 3.6 (10) | 1.699 ± 0.253 | 67 ± 7 | 1.8 | >91.9 |
| Irvington | 30 | >4320 | >4320 | - | - | 27 ± 7 | >160 | >91.9 |
| Irvington 624-5G | 30 | >4320 | >4320 | - | - | 0 | >160 | >91.9 |
| Linden 2019 | 30 | >4320 | >4320 | - | - | 3 ± 3 | >160 | >91.9 |
| Masiello | 30 | 54 (46–59) | 162 (137–202) | 9.9 (19) | 2.687 ± 0.217 | 90 ± 10 | 2.0 | 3.4 |
| New Brunswick | 30 | >4320 | >4320 | - | - | 7 ± 7 | >160 | >91.9 |
* RR (resistance ratio based on KT): KT of field population / KT of Fort Dix strain.