Fleas are a common ectoparasite of dogs and cats. They are prolific, can vector diseases, and cause severe allergic dermatitis. The common flea affecting cats and dogs in the US, Ctenocephalides felis, the cat flea, is the most common ectoparasite ofdogs and cats in North America. C. Canis, the dog flea, may also parasitize dogs. Fleas thrive in high humidity environments and may have either a rapid life cycle or delay their life cycle while waiting for favorable conditions for feeding, reproduction, and survival of immature life stages in the environment.
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机译：跳蚤是狗和猫的常见异位酸盐。它们是多产的，可以矢量疾病，并引起严重的过敏性皮炎。影响美国的猫和狗的常见跳蚤，Cttenocephalides Felis，猫跳蚤是北美最常见的异丙酸盐和猫。 C. Canis，狗跳蚤，也可能寄生狗。跳蚤在高湿度环境中茁壮成长，并且可能具有快速生命周期或延迟他们的生命周期，同时等待环境的喂养，再现和生存环境的有利条件。
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