Fourie L J, Kok D J, Peter R J
Department of Zoology and Entomology, University of the Orange Free State, Bloemfontein, South Africa.
J S Afr Vet Assoc. 2000 Dec;71(4):219-21. doi: 10.4102/jsava.v71i4.718.
Fleas cause allergic dermatitis in cats and dogs and therefore warrant control. It has been demonstrated previously that there is marked inhibition of the development of the immature stages of the cat flea Ctenocephalides felis on fleece blankets exposed to cats treated with imidacloprid. This study reports on the efficacy of imidacloprid in suppressing adult flea emergence in carpet exposed to treated cats. Circular discs of carpet pre-seeded with flea eggs and larvae were exposed to 6 untreated control and 6 topically treated (imidacloprid 10% m/v) cats 1 to 2 days after treatment and subsequently fortnightly for 6 weeks. Exposure times on alternate days were either 1 or 6 hours. Adult flea yield from carpets was determined 35 days after exposure. Differences between flea yield on control carpets and those exposed for 1 hour were significant only for days +1 and +14. For the 6-hour exposure, differences were significant at all times except on Day +43. The ability of imidacloprid to suppress the yield of adult fleas on carpets (6-hour exposure) steadily declined from 82 % (Day +2) to 12% (Day +43). For the 1-hour exposure it varied inconsistently between 0 and 83% over the 6-week study period.
跳蚤会引起猫和狗的过敏性皮炎，因此需要加以控制。先前已经证明，在用吡虫啉处理过的猫接触过的羊毛毯上，猫栉首蚤未成熟阶段的发育受到显著抑制。本研究报告了吡虫啉在抑制接触过处理过的猫的地毯上成年跳蚤出现方面的功效。在处理后1至2天，将预先接种有跳蚤卵和幼虫的圆形地毯盘暴露于6只未处理的对照猫和6只经局部处理（吡虫啉10% m/v）的猫，随后每两周暴露一次，持续6周。隔天的暴露时间为1小时或6小时。在暴露35天后测定地毯上成年跳蚤的产量。对照地毯和暴露1小时的地毯上跳蚤产量的差异仅在第1天和第14天显著。对于6小时的暴露，除了第43天，在所有时间差异都很显著。吡虫啉抑制地毯上成年跳蚤产量的能力（6小时暴露）从82%（第2天）稳步下降到12%（第43天）。在为期6周的研究期间，对于1小时的暴露，其变化在0%至83%之间不稳定。
