Lice suck blood

Google Scholar Articles by Althomali, S. Head Louse Bite on Neck From each egg or "nit" may hatch one nymph that will grow and develop to the adult louse. This cycle may continue for several weeks if the person is not treated. This disease reached its worldwide peak prior to but since that time has decline in occurrence except during wartime or during times when large numbers of people are living under crowded and poor sanitary conditions. Females of these flies feed on blood, while males prefer nectar. Also after a period of time the feces dries and the rickettsia become airborne resulting in transmission through inhalation. They feed on blood and only appear on mammals.
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What do head lice look like?

The most common vehicles of distribution are trading hats and combs, a common practice of school children. Image courtesy of VoPak Inc. The presence of nits alone however, is not an accurate indicator of an active head louse infestation. The lice are transmitted by direct contact between children - especially in the various child care centres. However, sometimes the itching from the bites can lead to excessive scratching that can sometimes increase the chance of a secondary skin infection.
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Liceworld | The head louse anatomy

Lice cannot survive more than a couple of days off your head. As in the other 2 species that attack humans, body lice cause dermatitis and considerable irritation. Lindane is an organochloride pesticide. Lice have developed resistance against most forms of pesticides so it is recommended that one uses pesticide free methods. Head lice are oblong and flat insects, whose bodies are divided into three parts: As long as you find living lice in your hair, you can expect new lice to be hatched about a week later.
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It occurs in the fur of the midbody, shoulders, and neck. About million people, mainly children, are treated annually for head lice in the United States alone. Historically, this disease has been instrumental in the outcome of several wars. Each egg has a lid that falls off during hatching and empty eggs are purer white. Human bodies have an allergic reaction to this saliva, which causes the skin to form itchy, red bumps after a mosquito bite. Human lice take many little blood meals during the day.
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