Site about the fight against domestic insects

The incubation period of development of head lice


Поговорим об инкубационном периоде головных вшей

Head lice - parasites are very narrowly specialized not only in the nature of nutrition, but in the place of their existence. They can live only on the scalp of a person and his closest relatives - some species of monkeys. Accordingly, the life cycle and features of biology, including the incubation period of head lice, are largely adapted and depend on the lifestyle of the person himself.

On a note

You should immediately decide on the terms. The incubation period of a disease is usually understood as the time between infection with it and the first clinical manifestations. To infect a person with head lice, this definition does not work - parasites will begin to bite a person immediately after infection, but due to a small number of them the patient may not feel this or not attach importance to some unpleasant sensations.

The incubation period of lice in biology is the time of development of lice eggs. Considering the fact that lice eggs are called nits, for an entomologist the incubation period of lice and nits is essentially the same thing. Given that many readers view lice as a disease, in describing the incubation period of lice, we will further consider it in a biological, and so to speak, popular sense.

The incubation period in lice: how quickly they begin to pester after infection



After infection, the first bites of lice occur in the first hours after the parasites get on the human hair - these insects can not do without food for more than a few days. However, the bites of one or two individuals that managed to creep onto a healthy person are not particularly felt and often do not attract attention. Because at this time to talk about any manifestation of lice is early.

The real symptoms of lice on the head begin to be felt after three to four weeks. During this time the nymphs of the first generation manage to withdraw and grow up, which already massively begin to bite the scalp of a person.

На фото - взрослая головная вошь и нимфы разного возраста

Under favorable conditions, the second generation of lice appears on the head in three weeks, and due to the large number of them they already cause severe itching and well-expressed discomfort.

On a note

Pediculosis is a complex of symptoms characteristic of people with severe lice infestation. In medical practice, pediculosis is considered a disease and manifests itself in the form of dissimilar symptoms caused by the activity of lice: itching, pustules, the appearance of spots and allergic rashes.

Thus, in this case, such an incubation period in lice can be considered equal to three weeks. It is during this period that all the signs of pediculosis appear on the head: nits, irritations, itching, and the possibility of infecting other people.

It is interesting

Depending on the conditions of life, the incubation period for the development of pediculosis may vary. For example, in winter or northern latitudes, when the head of a man is constantly covered with a hat, and the room is sufficiently heated, lice develop faster - sometimes a full cycle of their reproduction takes place in 16 days. In the middle latitudes, when a person's head is often open, parasites develop usually longer.

Reproduction of lice: details about nits and nymphs

The head louse is an insect with incomplete transformation. A larva hatching from her egg resembles an adult in appearance, but much smaller and incapable of reproduction. It feeds on the same things that adult insects feed - human blood - three times molts and turns into an adult insect.

On a note

Do not confuse the concept of "nits" and "egg lice." Nit is the formation of an egg and a cocoon from a sticky substance that ensures the retention of the structure on the hair. You can say that this is a kind of cocoon.

Фотография гниды головной вши под электронным микроскопом

Гнида прочно крепится к волосу и имеет специальную крышечку, через которую выбирается нимфа, когда созреет

Such a larva, which is generally similar to an adult insect, is called a nymph. The stage of the nymph is also characteristic of other insects, for example, for cockroaches, grasshoppers and bedbugs.

Стадия нимфы в развитии есть не только у головных вшей, но также, например, у тараканов

What is important is that each stage of development in lice lasts relatively briefly, and therefore the life span of these insects is small, and the rate of reproduction is quite large. In parasitologists, it is customary to call an insect, only released from the egg, a larva, and already a moult larva - a nymph.

Breeding times and incubation period of lice



The timing of the development of lice at each stage is different:

  1. The maturing period of nits is from 5 to 8 days, depending on the temperature. Optimum conditions for nits providing a minimum incubation period of nits - average air humidity and temperature of about 31 ° C. At temperatures above 40 ° C and below 22 ° C, egg development ceases and the larvae do not hatch. На фото - взрослая головная вошь и гниды
  2. The larva of the first age develops from one day at a temperature of 30 ° C to ten days at a temperature of 10 ° C.
  3. The nymph of the first age develops 5 days.
  4. Nymph of the second age develops for eight days and turns into a adult-adult insect.
  5. Adult insects begin to multiply after the first meal after moulting. Usually within 1-2 days after the transformation of the nymph into an adult insect, the females and males mate, after which the females lay 3-4 eggs each day.

The fact that the lice from eggs hatch after a long time is significantly affected by the temperature. At 25-26 ° C, lice hatch for 7-8 days, and at 32-33 ° C for 5-6 days.

Взрослая головная вошь и нимфа

How quickly lice are hatching does not depend on how often the head is washed or the hair becomes wet.

The time of the general reproductive cycle of insects depends on how many nits are ripening. The minimum development time from egg to egg is 16 days, the maximum can be stretched to two months.

On a note

There are almost no periods of hunger in head lice. They constantly live on the scalp, never leaving the human body. Therefore, there are practically no such factors as the presence or absence of food in the life of these parasites.

The maximum life of an adult head louse is 46 days. During this time the female manages to postpone up to 140 eggs.

And what about other species?

The incubation period of lice of other species differs little from that of head lice.

Thus, in a clothing louse belonging to the same species, but adapted to life on clothing, the nymphs hatch after 5-8 days. And the average development time is 3-4 weeks - like head lice.

Инкубационный период развития гнид у платяных вшей составляет 5-8 суток

On a note

Sometimes the expression "hatched nits" is in principle incorrect. Lice hatch nymphs, and the nits themselves are deposited by the female. Therefore, instead of "nits hatch" should be said "larvae hatch from the nits."

The incubation period of pubic lice is about 6 days, and the development of the larva is about 18 days. Their difference from head lice is that the adult pubic louse lives no more than 30 days, and one female can lay a maximum of 50 eggs.

Лобковая вошь - ее инкубационный период составляет примерно 6 суток (время созревания гниды)

In pubic lice, larvae of nits do not hatch at temperatures below 22 ° C.

Methods of fighting nits

To destroy and to drain nits is quite possible and even necessary at any stage of their development. This is usually done using special shampoos with effective insecticides - Pedilin, Parasidosis, Nittifor, Pedex, Chigia. Earlier, even kerosene was used against lice, but of course, it is significantly inferior to modern shampoos for its effectiveness and convenience of use.

Шапунь Педилин - помогает справиться с головными вшами

It is important that even after shearing your head, you need to wash your hair with shampoo and hold it under a plastic bag, since nits and lice themselves can stay on the skin and near the hair bulbs. And when using a shampoo that does not have the ability to kill louse eggs - you need to rinse your head again after 5-6 days.

And of course, always and everywhere you must follow the rules of hygiene: do not wipe yourself with another's towel, do not use someone else's comb. It is known that head lice can survive in the water for two days, so even bathing in public places can be fraught.

Be carefull!

To the record "The incubation period of development of head lice" left 70 comments.
  1. Konchicheva Anastasia :

    It's just horror, not lice, why they need it.

    Reply
    • Madinah :

      And it is true. And I say this to everyone, I saw what was happening on my head.

      Reply
      • Lech :

        Yes, it's an endless nightmare. They have a whole bunch of children.

        Reply
  2. Lady X :

    Vinegar is a good weapon against them, just not divorced. Caution: danger of burns!

    Vile insects, not lice, drove on the train and hello ...

    Reply
    • Anonymous :

      Hello! And how should I wash my head with vinegar? How much to keep? The daughter had lice.

      Reply
      • Anonymous :

        To 100 ml of water 1 tbsp. 9% vinegar.

        Reply
      • Anonymous :

        Buy a Couple Plus. I just did not take them out: I bought vinegar, MediFox, with chemistry and chinese water. Only Para Plus helped. I have been suffering for 2 months. Both myself and my daughter are tired to comb out. But cheers - we won them!

        Reply
    • Anonymous :

      You're crazy! God forbid in the eye ... I advise everyone, God forbid!

      Reply
    • Anonymous :

      The same, the train ...

      Reply
  3. Andrew :

    Just awful.

    Reply
  4. Hey :

    With them, a simple hair dye does a good job. The first time I painted it, the second one a week later.

    Reply
    • Anonymous :

      Aha. No matter how it is. I was painted just the next day, as I found the lice in my eldest daughter. Naturally, I immediately processed it. In a week the daughter has processed repeatedly. And I found lice in my room. So it's not true that they do not go over to dyed hair. And it's not true that the paint for the head saves. Only if you lighten up. The other paint does not kill everyone. And eggs - that do not care.

      Reply
      • Anonymous :

        So their paint kills, and not that they do not sit down on dyed hair.

        Reply
    • Master :

      Lice are simply dyed and not noticeable. Friends had a case: a week passed, the paint was washed off, and again friends.

      Reply
  5. ANNA :

    Horror - I never knew what it was. The first time I see, I almost went crazy, I already ran goose bumps! Brrr.

    Reply
  6. Anonymous :

    You must always carry your own bed linen.

    Reply
  7. Anonymous :

    What if the lice are already in the head, and learned only after 2 weeks?

    Reply
  8. Gleb :

    The first time I saw lice in my head in class five. The second time already when I worked in a solid firm. In the first case, a small boy does not need to shave his head, but the second case would not allow it. But, thank God, he found the comb, he was cured.

    Reply
  9. Anonymous :

    My daughter was put in the hospital, and 2 days later she began to scratch her head. I looked, and there are nits pieces 25, the orderlies say that it's not with them, but she already had them. I'm sure it's from their pillows. Most importantly, the bed was from the house.

    Reply
    • Irina :

      I have the same, only in my case I contracted myself, thank God, the baby is fine, otherwise I would go crazy.

      Reply
    • Anonymous :

      For 2 days 25 nits will not be postponed, so many pieces can be deposited for 10 days minimum.

      Reply
      • Anonymous :

        If you read - then one individual lays 3-4 pcs a day. And 25, it turns out, for a couple of days, 3-4 individuals will do well) Many such animals do not need to start.

        Reply
      • Lech :

        Can!

        Reply
  10. Anya :

    The hair dye acts only on the lice themselves, and it is almost impossible to get rid of nits, you have to choose and save hair or shave bald!

    Reply
  11. Anna :

    Lice are very unpleasant, but they all are and sometimes wander into the cleanest and neatest heads. In the modern world there is a lot of funds from pediculosis to any purse. And the whole family needs to be treated, regardless of the presence of parasites, and also to wash the clothes worn in recent days, and bed linens.

    Reply
  12. Leila :

    Alcohol pharmacy + drops 20 "tea tree". Dampen the hair very strongly, put the bag tightly, cover the entire head. Better on all night. Repeat after 4 days. To guarantee the procedure done 4 times.

    Reply
    • Leila :

      Oh yeah ... Take a spray bottle for 400-500 ml, so it's very convenient and make a solution, and water the head.

      Reply
    • Anonymous :

      It only helped us.

      Reply
  13. Valentina :

    Triple cologne for the night: a pack and a handkerchief. Lice burn, nits die.

    Reply
  14. Anonymous :

    Dichlorvos every three days. A nit pull, constantly look at the head. Still it is possible a chemist's means from which nits crack. I was only so saved. Even an adult hooked in a taxi !! They catch - just spit at all. They even jump from one person to another.

    Reply
  15. Victor :

    Jump is unlikely. After the resort, they found these creatures in their African pigtails. I will never allow it again! They also paid money for them not frail)) A month ago they processed it, and at the same time the whole family. And here again. Only his wife, and her hairy be healthy! This time we will more carefully process ...

    Reply
  16. Yana :

    Chemeritsa helps very well

    Reply
  17. Tanya Smagulova :

    Chemeritsa can cause irritation, especially if the wound in the head from bites gets. And God forbid that I fell in the eye. Dichlorvos - also not an option, breathe, as there is nothing to do, burns of the larynx can be. Alcohol dries terribly skin ... Pills from folk remedies are not small.

    Reply
  18. Andrew :

    Benzyl benzoate, emulsion - inexpensive and effective. On this tool little pay attention, and not in every pharmacy you buy. True, the smell of the emulsion is still one, but in comparison with the most inexpensive shampoo, the difference will be 5-fold. It is mandatory to wash the hair with a 6 percent r-vine vinegar (vinegar dissolves the glue to which nits are attached). And constantly examine and examine the hair ...

    Reply
    • Anonymous :

      Vinegar and ironing for the hair (curling iron) will help well, treatment of the head with a pediculum, scallop comb.

      Reply
  19. Olga :

    Do you guys, in what century do we live? What shave is it? Spray the "Pair plus", and after ten minutes wash your hair. All! The instruction is enclosed. And lice, and nits on the spot. Allowed for children from 2.5 years. Health to all!

    Reply
    • Irina :

      And PARA PLUS did not help us. They did everything according to the instructions, kept even 20 minutes, and still found after three days another louse, and then nits still. The pharmacy said that all these sprays only "freeze" nits and lice for a while, and during this time they must be combed or pulled out of the hair. On control, then another month to keep and check your head.

      Reply
    • Anonymous :

      Nit he does not kill (

      Reply
  20. Alain :

    I totally agree. Today Para Plus was treated with a daughter, kept for 15 minutes. I chose nits, 20 pieces, probably. 4 of them clicked, the rest are dry. Tomorrow I'll buy something else. Almost 200 UAH. rolled away, and no sense.

    Reply
  21. Anonymous :

    Paranit is a good help.

    Reply
  22. Anonymous :

    I bought it on the advice of Para Plus, I also thought I would bring the children off to one day. Nothing like this. After 5 days, they again combed. Began to squeeze, fell small lobsters. I do not even know what to buy for the whole family. It's a shame how they picked up the lice. I thought and wondered where it had come from school. After checking it turned out that the school floor with lice.

    Reply
  23. Irina :

    Guys, chaerical water - a very good tool, even deleted a 3-year-old child. Yes, it is necessary that there are no serious wounds (to observe the child during the procedure), apply as quickly as possible (in gloves), not to breathe in pairs, and necessarily a cap or a packet on the head. They held for 40 minutes. Then wash off. Comb out the hair with a fine scallop. Repeat the treatment with chilled water in 5-7 days. Here is the basic meaning: the incubation period of the egg is 5-7 days, plus another 5-7 days before the sexual maturity of the insect, when it is capable of laying eggs. Just from those nits that survived after the first treatment, the larva hatch, but it is not yet capable of reproduction, here we finally kill them and no new eggs ... EVERYTHING! And be sure to stretch all the clothes, things at a temperature of not less than 60 degrees, then iron with an iron. Comb hair, soak in the vinegar for a day, and then rinse with hot water. Caps, if you can not wash according to the instructions, put them in the freezer for 1-2 days. Health to all!

    Reply
  24. Vika :

    How many lice do lice lay? I am 11 years old.

    Reply
    • Master :

      For the day 6 nits. But the life expectancy of lice is about a month. If you multiply 30 * 6 = 300. Hurry, otherwise it will be bad.

      Reply
  25. Alina :

    How exactly to get rid of lice?

    Reply
  26. Anonymous :

    Purified kerosene - apply on the head, put a bag on your head and tie a strong handkerchief over it, for 30 minutes, walk around and wash your head. A tool that has been tested for years.

    Reply
    • Anonymous :

      I nifiga kerosene did not help ... ((I do not know what to do with them any more.

      Reply
  27. Anonymous :

    What to do? It seems that they washed their hair with a special shampoo. A few days later, I found a living small lice. We combed it, I found it anyway.

    Reply
  28. Anonymous :

    I found only one alive, there are no others alive. Can I wash off the nits? Mom says I have less of them.

    Reply
  29. Anfisa :

    Caught lice in the summer, it is very difficult to withdraw. There were very long hair, it was necessary to cut to the shoulders ((Tried PEDIKULEN ULTRA.) We found one live big louse for tomorrow. We do not know what to do.

    Reply
  30. Olga :

    I at the daughter ironing burn out nits, then we process.

    Reply
  31. Lyudmila :

    The other day I found my lice, I can not put my mind where I snapped. Pharmacy shampoo did not help. Then spread kerosene with vegetable oil in a proportion of 1: 1. Has put or rendered plentifully a mix, then a package and resembled so 1,5 hours. Already washed from the mixture the hair rinsed with water and vinegar (table vinegar 9% concentration is diluted with water in a ratio of 1: 2). No lice or nits anymore.

    Reply
  32. Anonymous :

    Treat Pediculum, then treatment with a styler, rinse with 1: 1 vinegar, comb it out, go to the steam room and process all the houses.

    Reply
  33. Oksana :

    And I brought out the children last year with camphor alcohol, although with a sharp smell, but you can suffer. She sprinkled her head well, held it for 20 minutes under the bag, shampooed everything, and rinsed her hair with diluted vinegar. She wiped it a bit and went combing her hair for four days in a row, and repeated the same thing for 4-5 days with camphor alcohol. It helped. Yesterday I took it out again, soon to school, somewhere else they typed up. And these shampoos - garbage, we did not help, and threw a lot of money.

    Reply
  34. Alevtina :

    Daughter brought it from school. Since we are shooting sparrows - have bought again Khygiyu (shampoo). The last time it helped well and the hair gets better. After it - scallop (there in the box). While the best means have not found. We will repeat in a week. Do not torture children with kerosene and alcohol.

    Reply
  35. Katya :

    We picked up this muck on the train, found out in 2 weeks only, the baby began to itch! At us the boy, therefore at once have decided to cut it shortly, after have processed and have forgotten. We ran into this for the first time, we did not read much information on the Internet ((Apparently, he had nits!) After weeks 3 the child started scratching again, combed out 7 adult lice .Oh, horror, nit was a huge amount! Bought Nyudu, , combed the nits for 4 days Now every day we look at the head 2 times, my husband and I do not have them. IMPORTANT: We must observe at least a month, because not to comb out all - in 2-3 weeks will be the same. without stopping, stroking and changing bed linens every day, like all the rabbi's clothes (7 years old), we also examine ourselves with our husband, because we are already in panic.

    Reply
  36. Madinah :

    My daughter picked up lice, which we just did not try: Chigiya, Antibi, tea tree oil, I comb out every day. They are with us, are not deduced. I do not know what to do next.

    Reply
    • Irina :

      When the daughter brought such a gift, shampoo from lice did not help. Then I took the Chinese dust and in this shampoo I poured more of it. Lice are dead for sure. I do not know about nits. Soap it to her after 4-5 days. The nits were mostly dead, filmed along the hair under a table lamp and with a magnifying glass. It took 5-6 weeks to heal, not less.

      Reply
    • Anonymous :

      Try to go to a neurologist. Lice very often jump out on the nerves.

      Reply
  37. Vic :

    We tried a lot of sprays, shampoos, combed them with a scallop! Nothing helps. Daughters of 9 years, I can not cut it short, crying! For the third month we are fighting. Forces are no more. The youngest got infected, I treat everyone + clothes and bed-clothes.

    Reply
  38. Anonymous :

    Where I picked up, I do not know. What to do?! I just gave 700 rubles for shampoo, but it did not help. And as the most important thing - nits, they generally can not be withdrawn.

    Reply
  39. Olya :

    Do not wait 7-8 days, poison them every three days, two weeks. The nits do not hatch in one day, and you will be happy!

    Reply
    • Guzel :

      All right! No remedy will help if you do not continue treatment for two weeks.

      Reply
Leave your comment

Up

© Copyright 2013-2016 nsns.biz

Copying site materials is allowed only with the indication of an active link to the source

Feedback

Advertisers

Site Map