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蛔虫是世界上最常见的寄生虫,据报告,人蛔虫感染的约占总人口的1/6。蛔虫的种类很多,危害人类的除人蛔虫外,尚有各种动物寄生的蛔虫,如猪、犬、猫、鸡等蛔虫。它们分布的范围极广,虫数甚多,况且这些家畜与人的接触十分频繁,人受这些动物蛔虫感染后,虽多不能发育成熟,但可引起幼虫内脏移行症。在我国农村蛔蚴移行症是经常发生的。
Roundworms are the most common parasites in the world. Human roundworm infections are reported to account for about one-sixth of the total population. Many types of roundworms, endangering humans in addition to human roundworm, there are a variety of animal parasitic worms, such as pigs, dogs, cats, chickens and other roundworms. They are distributed in a very wide range of insects, and there are many insects. Besides, these animals have frequent contact with people. Although people can not mature enough after being infected with these animals, they can cause visceral migration of larvae. Alzheimer’s disease in rural areas in China is a frequent occurrence.