While more than 2,000 species and subspecies of fleas are known, only nine have significant medical and veterinary importance, and only six involve man. Eggs drop easily from pet hosts to be widely distributed throughout the home. Human flea bites range from small red welts to severe rash and itching; they are usually found only on wrists, ankles and legs. Treatment is symptomatic. Control of flea infestation is based on knowledge of the life cycle of the insect.
虽然已知有2000多种跳蚤物种和亚种，但只有9种具有重大的医学和兽医意义，只有6种涉及人类。跳蚤卵很容易从宠物宿主身上掉落，从而在整个家中广泛分布。人被跳蚤叮咬后，症状从小红疹到严重皮疹和瘙痒不等；通常只在手腕、脚踝和腿部发现。治疗是对症治疗。跳蚤滋生的控制基于对这种昆虫生命周期的了解。
