Lice – how many live without a person and through what time die nits

Although the yard and the XXI century, and problems with lice are not sunk into oblivion.
Everyone can suffer from their invasion: the insect will spoil successfully
life for both well-to-do person and homeless beggar. Any resident
the planet must be armed with knowledge of the nature of the parasitic
bloodsucker and how to deal with it. lice

How do lice develop and where do they live?

The content of the article:

  • How do lice develop and where do they live?
  • How many lice live outside the human head and how to destroy them?
  • How long does a nit die without a man?
  • What are the parasites and their symptoms
  • Can there be lice on short hair?
  • Frequently asked Questions:

The life cycle of the parasite includes several stages:

  1. Fertilization that becomes possible
    immediately after the transformation of the larva into an adult.
  2. Laying eggs. The female can lay eggs
    and without contact with the male, but they will all be empty. But later
    2 days after the contact on the hair there will be those nits that
    subsequently give offspring.
  3. Nits – lice eggs that ripen within
    4 – 13 days.
  4. Larvae developing from nits. Passes 3
    developmental stages – nymphs, at the end of each of them the larva changes
    chitinous cover. The third molt finally turns it into
  5. Imago is an adult louse capable of


Head louse lives exclusively on human hair. If a
she was out of her carrier, then in an effort to survive
settle for “snack” in the form of rabbit blood, a cat. But for
life only needs a man.

There are other varieties of this parasite:

  • The clothes louse lives on clothes or bed
    underwear. Man for her, or rather his blood – the source
    food, but she can not live on it. wardrobe
  • Pubic louse lives where there grow tough hair on
    body: pubis, eyelashes, mustache. pubic lice

Each of these varieties will bring a lot of trouble to the person
and, most importantly, it will increase the risk of infection with such serious
diseases like typhus and relapsing fever, Volyn or trench

How many lice live outside the human head and how to destroy them?

REFERENCE! Head louse – insect parasitic
and voracious. For normal life it requires
“snack” in the form of human blood 4 – 5 times, and young individuals –
up to 8 times a day. If the parasite is outside the human head, then
its lifespan will depend on how
quickly he will be able to find himself a new object for parasitism: his
the oral apparatus is designed in such a way that nothing but blood
unable to swallow.

Louse, which is inhabited by human hair,
environmental conditions can survive only about 1 – 12
days. Such a wide time range is due to conditions in
which will be an insect:

  • At a temperature of + 32 ° C to + 36 its duration
    life can take about 2 – 4 days.
  • When the temperature approaches the mark + 39C –
    + 42C adult does not last longer than 24 hours,
    instant death will occur at + 45C.
  • But when the temperature drops to +22 C and below
    the louse will cease to multiply and will soon hibernate: all
    the processes in her body slow down and the insect will not need
    in food. The duration of her life in such conditions may be
    10 – 12 days. Total death will occur only when the air
    indoors or outside it will cool to – 15C.


To leave the head of its “donor” parasite can in different ways:
when combing, shaking the hair, together with
cropped hair. Can insects and their own
go “explore” new territory in search of a new
the victims. As a rule, they can later be found on
any fleecy surfaces: on the carpet, soft toys, upholstery
furniture, bed and clothes of the patient, – in those places, conditions
stay in which as close as possible to the living conditions of lice on
head covered with hair.

To get rid of parasites in the room,
It is necessary to take a number of measures:

  • Conducting wet cleaning. In water
    it is advisable to add any product with a pronounced odor
    (bleach, ammonia, vinegar): the blood-sucking parasite is not
    tolerates harsh aromas whose strong concentration can
    cause an attack of asphyxiation. wet cleaning
  • Garments also require processing. Their
    must be washed in hot water (+ 60 ° C and above), then ironed
    iron, pouring hot steam. If the fabric structure does not give
    opportunities to use this method, you can try
    destroy insects by carrying things out in the cold and leaving there on
    long time. washing
  • The maximum guarantee will be given
    insecticide products (Raptor, Raid, Clean House, Hangman,
    Karbofos, Dichlofos neo): it is desirable to treat them “dangerous”
    surface and clothing of the patient. Hats, fur coats – all that is impossible
    to wash and stroke – should also be sprayed with any aerosol –
    broad-spectrum insecticide. It is advisable to put
    a wardrobe item after a plastic bag. Detailed
    recommendations for recommended exposure times
    contained on the packaging of drugs. Dichlorvos Neo from lice and nits
  • Do not forget about the processing of comb
    the patient. It should be thoroughly cleaned with running hot.
    water, you can pour boiling water, then wipe with a cotton swab,
    moistened with medical alcohol. You should do the same with the comb,
    with the help of which combed nits. comb

ATTENTION! When processing with insecticides is important
remember about security measures. In the room where it is produced
processing, should not be present pets, other people.
At the expiration of the time the effects of drugs on the treated
surfaces, the room must be well ventilated and washed with water
by adding plain baking soda.

How long does a nit die without a man?

The dense shell of the nits protects it from any negative
impact from the outside. Experienced parents know that one
insect dressing in the baby’s head is not enough: required
thoroughly combing eggs from the head, since many of them
Toxic substances will not remain destroyed. Therefore, the larva
can exist without a person for quite a long time (about 8
days), and under favorable conditions, passing all phases of his
development, hatch safely. Immediately after the appearance
a young insect should get a portion of blood, if
it does not happen, it will die within a day. Dead nits

What are the parasites and their symptoms

Head louse is an insect whose average size is
reaches 1,5 – 3 mm. It has an oblong gray body,
white, yellow or brownish color, the intensity of which
depends on the degree of satiety of the parasite. Body lice includes 3
department: head diamond-shaped with located on it
piercing-sucking apparatus and a pair of simple eyes, trapezoid chest
with three pairs of paws and an oval oblong belly, on which
there are genitals. louse

IMPORTANT! The opinion of those who believe that lice
freely jump from head to head. It is not: speed
insect movement does not exceed 23 cm per minute. Therefore get from
one person to another parasite can only with long
close contact of heads and hair or through objects of the external environment,
for example, a common comb.

When it gets on the scalp, the louse begins
violent activity, however, the first days after infection carrier
notices anything. Food insect does not cause
human uncomfortable feelings. But it is for the time being, until the time …

  • Each bite of louse is accompanied by a release of a special
    an enzyme in the scalp that is irritating to
    carrier: while bites are rare, the disease proceeds
    asymptomatic, but with an increase in the number of parasites, numerous
    enzyme emissions make a person feel a constant itch on
    head. The desire to constantly scratch your head – the main symptom
  • Sometimes a person wants relief from itching.
    combs head to wounds that quickly when
    infection may begin to fester. Availability
    scratching on the epithelium of the scalp is one of the signs
  • The main sign of insect infestation is the presence of
    the hair of the smallest translucent eggs, which can be easily confused
    with dandruff. Just shake them off like dandruff
    succeed: they are firmly attached by a “caring” female special
    sticky solution.


Can there be lice on short hair?

Lice feed on human blood. The hair they need in order
to move freely on the head (so arranged them
organism) and lay on them your eggs – the future offspring. AND
hair length does not play any role in this case. Parasites will
feel great in a long braid and on a haircut “under the hedgehog”
with a hair length of 3 – 4 mm. Save from insects and their
offspring can only complete cutting hair “under zero.”
lice on short hair Do you pass regular
inspection for the presence of lice and nits? Yes

Frequently asked Questions:

How many lice can be on the head in

An exact answer to this question is impossible to give:
The number of individuals and nits directly depends on the length of the hair, their
thicknesses, as well as the degree of neglect of pediculosis. On average each
an adult female lays 2 to 5 eggs daily, sticking them to
base of the hair. For 30 – 40 days of its life the parasite is able
reproduce 120 – 160 nits, each of which will become an adult
individual after 7 – 12 days. If no hold
measures for the destruction of insects, the results of such
breeding can testify simple

As a result, without being placed on the hair, parasites can
migrate to the eyebrows, underarm hair, to the body,
if it is covered with “vegetation”. Pediculosis – fast
progressive disease requiring immediate action
combat it.

REFERENCE! Some sources claim that
at the same time on the human body can be up to 75 thousand
parasitic individuals! With so many insects is not excluded
lethal carrier.

The presence of parasites in the head not only violates the aesthetics
human life, but also threatened by serious infection
diseases. In addition, the lives of people who fall ill
head lice turns into hell: constant itching, nervousness, bad
sleep, attacks of aggression and irritability. Only completely
getting rid of insects, it will be possible to normalize their health.

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