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Females get head lice twice as often as males, [46] and infestation in persons of Afro-Caribbean or other black descent could be rare due to difference in hair shape or width. [ 46 ] [ 49 ] But these children may have nits that hatch and the live lice could be transferred by head contact to other children.
Thus, mobile head lice populations may contain eggs, nits, three nymphal instars, and the adults (male and female) . [1] Metamorphosis during head louse development is subtle. The only visible differences between different instars and the adult, other than size, is the relative length of the abdomen, which increases with each molt, [ 1 ] as ...
Pediculosis pubis (also known as "crabs" and "pubic lice") is an infestation by the pubic louse, Pthirus pubis, a wingless insect which feeds on blood and lays its eggs (nits) on mainly pubic hair. Less commonly, hair near the anus, armpit, beard, eyebrows, moustache, and eyelashes may be involved.
Head lice are about 2 to 3 millimeters long, and they usually infest the head or neck and attach their eggs to the base of the hair shaft, according to the CDC.
And, unlike, brown recluse bites, a black widow spider bite can cause symptoms that affect a large area or the entire body. ... you might notice lice eggs called nits, Kassouf says. Nits are tiny ...
From each egg or "nit" may hatch one nymph that will grow and develop to the adult louse. Lice feed on blood once or more often each day by piercing the skin with their tiny needle-like mouthparts. While feeding they excrete saliva, which irritates the skin and causes itching. [8] Lice cannot burrow into the skin. [citation needed]
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A louse's egg is commonly called a nit. Many lice attach their eggs to their hosts' hair with specialized saliva; the saliva/hair bond is very difficult to sever without specialized products. Lice inhabiting birds, however, may simply leave their eggs in parts of the body inaccessible to preening, such as the
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