Ctenocephalides felis infestations outbreak is documented as a welfare and production limiting disease in neonatal calves in eastern New South Wales, Australia. Due to the calves' discomfort, the first objective was to relieve the calves from the large burden of fleas. The affected neonatal 0-4 week old calves showed dull and quiet demeanour, with the geometric mean of body condition score (BCS) 2.67 (2-4) and geometric mean burden 41.51 (15-75) of fleas collected over 3 min. Deltamethrin pour-on (Arrest Easy-Dose, Virbac Animal Health, Australia) registered for treatment of lice and flies on cattle in Australia was evaluated for control effect of the cat flea (C. felis) on cattle. The fleas were identified morphologically as being C. felis which was confirmed by sequencing cytochrome c oxidase I gene (cox1). We report successful improvement of welfare and reduction of flea counts post application of pour-on deltamethrin on the property. In the absence of registered flea product for cattle in Australia, deltamethrin pour-on product is a suitable option, because of its registration for control of lice and flies on cattle.

中文翻译：

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在澳大利亚，使用溴氰菊酯浇灌处理的新生乳牛犊中的Ctenocephalides felis（猫跳蚤）感染。

在澳大利亚新南威尔士州东部，小腿虫侵染暴发已被证明是一种影响小牛的福利和生产的疾病。由于小牛的不适，首要目标是减轻小牛的跳蚤负担。患病的新生儿0-4周龄小牛表现出呆滞且安静的举止，在3分钟内收集到的蚤的几何平均体况评分（BCS）为2.67（2-4），几何平均负重为41.51（15-75）。评估了在澳大利亚注册用于治疗虱子和苍蝇的溴氰菊酯（Arrest Easy-Dose，澳大利亚Virbac Animal Health）对猫蚤（C. felis）对牛的防治效果。跳蚤在形态学上被鉴定为猫屎肠杆菌，这通过对细胞色素C氧化酶I基因（cox1）进行测序来证实。我们报告了在财产上泼洒溴氰菊酯后成功改善了福利并减少了跳蚤数。在澳大利亚，没有注册的牛跳蚤产品，溴氰菊酯浇灌产品是合适的选择，因为它已注册用于控制虱子和苍蝇。