Head lice are the parasitic insect. They are found most usually behind the ears and near the neckline at the back of the neck. The medical term for head lice plague is pediculus humans capitis.
There are 6-12 millions cases of head lice experiential in the United States every year. It is more normally found in children than adults. Head lice plague is found to be too much psychologically worrying. But a head louse is not found to promote any fit hazard and does not cause increase of any disease. Head lice infestations are very rarely seen in African Americans. It is because the louse prefer as exact hair shape and width.
Causes of Lice Infestation
The life cycle of head louse has three stages that are the nit, nymph and adult. The life cycle of a on its own louse from egg to egg is about on month. In the nit stage, the head lice lays eggs.
Nit's are laid by the fully developed female louse and are attached to the base of the hair shaft by strong cement. They are positioned close to the scalp because they require body heat for incubation. Nits are yellow to white in colour; they take near concerning 6-9 days to hatch.
They are oval in shape and are positioned within 6mm of the scalp. In the nymph stage, an egg hatches and releases a nymph. The nit shell stays attached to the hair and turns a dull yellow colour. The nymph looks like an adult scoundrel but is smaller. As the nymph grows, it molts out of its exoskeleton three times before it become an adult.
Nymph is in general about the size of a pinhead. It is of same shape as the adult louse. It is located close to the scalp and the nymph become adults after about 7 days. The adult louse feeds about 5 times a day by piercing.
The skin with its claws, injecting exasperating saliva and sucking blood. Lice do not become enlarged like ticks, but their colour changes to a rust colour after feeding. Head lice hold onto the hair with fastener like claws found at the end of each of their 6 legs. Adult lice are active and can journey quickly.
Symptoms of Lice Infestation
Scalp itching is a ordinary symptom of head lice. There is a sensation of something is a sensation of something moving in the hair. Red or pustular sores on the scalp are caused due to scratch.
Swollen lymph nodes in the face and back of the neck may be seen. Head lice can be spread by direct contact with the head or hair of an infested person. The mature louse can survive up-to 1-2 days without feeding on the scalp.
Therefore, it can be found on substance that has been in contact with an infested person. Examples of objects that commonly spread head lice are like clothing such as hats, searves, coats and sports uniforms. Hair care instrument such as combs, brushes or towels may also lead to spread of lice plague. Other substance such as pillows, beds, carpet and stuffed animals may also lead to the broadcast of lice Infestation.
Treatment of Lice Infestation
Medications that kill head lice are called pediculicides. All pedicuicides except Malathion are practical to the scalp and hair and left on for 10 minutes, then rinse off. Pediculicides kill nymph and mature lice, but do not obliterate nits. Due to this, it may be wanted to reapply 7-10 days after the first submission to kill newly emerged nymphs.