How are lice formed and how do lice reproduce?

The eggs of lice are pale yellow, oval, long, and covered at one end. When laying eggs, female lice use their tails to hold the hair or clothing fibers, secrete glue, and stick the eggs so that they do not fall off. Both head lice and pubic lice lay eggs on hair, while body lice lay eggs on the fibers of clothing.

The eggs of lice, which hatch from the egg shell after 6 to 8 days of development, are called nymphs. The morphology of nymphs is basically similar to that of adults, except that they appear to be slightly lighter in color and slightly smaller. Once hatched, the nymphs can suck blood, and after about 9 days, they will become adults after 3 molts.

Sanitary conditions change, we all know that in the 80s and before, our housing conditions were very poor, basically the family could not take a bath, and the bath needed to go to the public bathroom, so that everyone's sanitary conditions were very poor, in other words, the body was dirty, so as to provide a good living environment for lice. Now that our living conditions are better, we have changed our clothes more frequently, and we can basically bathe at home, so it is difficult for lice to survive.

Reduction of green foods. We all know that in the past, our food and vegetables were basically green, and chemical fertilizers were not so popular, but now chemical fertilizers are everywhere, and some additives in food are also more, and people also contain these things after eating, and for lice, they can't bear it, and these pesticides and other chemical components we carry can completely poison lice.

Underwear material. In the past, the clothes we wore were cotton, and the clothes we wear now basically contain chemical fiber, which is very suitable for lice to survive for cotton underwear, but not for chemical fiber, which is also a reason for the gradual extinction of lice.

01 Lice do not arise for no reason, they are a parasite, and most of them are infected by infection. By studying two types of lice parasitic on the human body, American scientists speculated that the ancestor of today's human beings, "modern man", and the ape "Homo erectus" may have had "close contact" during evolution.

Adults and nymphs of lice suck blood on the host for life. The main hosts are: terrestrial mammals, a few marine mammals, and humans are often parasitized.

Lice are not only harmful to blood sucking, but also make the host itchy and uneasy, and can transmit many important human and animal diseases. Lice do not arise for no reason, they are a parasite, and most parasitic infections occur through infection. By studying two types of lice parasitic on the human body, American scientists speculated that the ancestor of today's human beings, "modern man", and the ape "Homo erectus" may have had "close contact" during evolution.

Relapsing fever, transmitted by lice, is a worldwide disease, and the causative agent of this disease is a spirochete. Lice have a lifespan of about six weeks, and each female lays about ten eggs a day, which adhere firmly to human hair or clothing. After about eight days, the small lice hatch and immediately bite and suck blood.

After about two or three weeks, it can grow into an adult worm through three molts. People can spread to each other due to contact, and the spread of relapsing fever is that after it bites, the bitten part is very itchy, and when people scratch hard, the lice will be squeezed out, and the pathogens in its body fluids will be brought into the bite wound with the scratching, and people will get sick.

The best way to combat relapsing fever is to eradicate lice; If we often bathe with hot water and soap, change clothes frequently, and pay attention to environmental hygiene, we will not get lice on our bodies. If lice have already grown, they can be killed with medication. Clothes with lice can be boiled in boiling water, and if there are lice in the hair, the hair should be shaved off.

Because pubic lice are motary, they can survive alone for 3-5 days after being separated from the human body, in order to avoid cross-infection between characters.

Most of the ways of infection are through contact, for example, head lice may be infected through direct or indirect contact, pubic lice can also be transmitted through direct contact, especially sexual contact or indirect infection, the use of common bedding, textiles, etc., as well as the utensils used to comb hair, can be used as a medium to spread. After the occurrence of lice, whether it is head lice, pubic lice or body lice, it needs to be carried out in time**, mainly insecticide**. In addition, lice-borne diseases are more common in winter and are related to personal hygiene.

One. Pay attention to personal hygiene.

The most important reason for lice is that you do not pay attention to personal hygiene, wash your hair frequently, try to get as little rain as possible, and when washing your hair, try not to only get wet with water, you can rub it with your hands, and then wash your hair with water, it is recommended to wash your hair at least twice a week.

Two. Don't keep your hair too long.

If you are a child and have been following your grandparents for a long time, it is recommended that parents do not let them have too long hair, so that the probability of lice will be lower.

Three. Wash laundry at home.

When a child has lice on his head, he can take out everything in the house and wash it, and it is best to soak it in hot water, so as to avoid the regurgitation of lice.

Four. Go to a regular pharmacy and buy medicine to kill.

The reproduction rate of lice is very fast, if you want to get rid of it, you must prevent it fundamentally, at this time, do not buy medicine to get rid of lice, you can go to the pharmacy for consultation, buy less harmful medicine home to get rid of lice.

Five. Use vinegar to remove lice.

If you are worried that the drug will cause great harm to the body, you can also choose to wash your hair with vinegar at this time, according to the ratio of 1:1, and wipe the prepared vinegar water on the scalp after washing your hair.

Six. Grate. This is the easiest and quickest way, go directly to buy a grate, comb it from head to tail, you will find that the head lice are combed off, and then remember to strangle it with your hands. Also, you can put a few blank sheets of paper on the ground, because when combing, head lice may fall on the ground.

Seven. with vinegar. Lice are not the most terrible, eggs are the most terrifying, it is extremely sticky, and it cannot be sieved off with a grate, so you can wipe your hair with vinegar first, don't let go of each one, and then stuff it with a shower cap for about an hour, and then use a grate comb, it is best to wash your hair with water and dry it, you will find that you have combed off some lice eggs. But this one should be insisted on, and after a few days, it can basically be removed.