With the improvement of people's living standards, the health condition has been greatly improved. In the environment where we live, there are fewer and fewer lice, but it is not without them. If you don't pay attention to hygiene, lice may breed at any time.
Lice is usually transmitted by contact. There are many parasites in small animals such as weeds and cats and dogs. Many children get lice because they are in the grass or playing with cats and dogs. In addition, contact with people or public goods with lice can also infect lice.
The spread of human lice is caused by direct and indirect contact between people. The transmission of crabs is mainly through sexual intercourse. There are three kinds of lice parasitic on human body: body lice, head lice and crabs.
Extended data:
Self-portrait and head lice, seemingly unrelated things, are related to self-portrait fever. Head louse is a small gray wingless insect, which breeds rapidly. Head lice are most common in children, especially girls, and spread by touching the patient's head, comb, hairpin, hat and headscarf.
Some pediatricians in the United States have noticed that under the selfie craze, older children like to take pictures with their heads against their heads, which gives lice an excellent opportunity to "stroll" from one head to the other.
Sharon Link, a doctor in Wisconsin, called head lice infection caused by selfie fever "social media lice". Marcy Macquillan, a head lice treatment expert in California, also noticed a significant increase in head lice infection among young people. What worries experts even more is that in the United States, head lice have developed resistance to pyrethrins, a commonly used therapeutic drug, and it is becoming more and more difficult to treat.
Rong Qing of Southern Illinois University began to pay attention to the increasing drug resistance of head lice in 2000. He recently collected head lice samples from 30 States in the United States, and found that samples from 25 States had high resistance gene variation to pyrethrins.
Baidu encyclopedia-lice
Xinhuanet-American medical experts: selfies and photos may lead to head lice infection.