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You might not even see the bites first—the initial giveaway might be tiny lice eggs (a.k.a. nits) first. ... invisible to the naked eye. Their bites take the form of flat, red patches or raised ...
There may be some grey-blue discolouration at the feeding site, and eggs and lice may be visible. [1] [2] [3] Scratch marks, crusting and scarring may be seen, and there may be signs of secondary bacterial infection. [1] Diagnosis is by visualising the nits or live lice, either directly or with a magnifying glass. [5]
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 ...
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.
Lice inhabiting birds, however, may simply leave their eggs in parts of the body inaccessible to preening, such as the interior of feather shafts. Living louse eggs tend to be pale whitish, whereas dead louse eggs are yellower. [5] Lice are exopterygotes, being born as miniature versions of the adult, known as nymphs. The young moult three ...
When your child is the temporary home for these blood-sucking freeloaders, the social issue can sometimes be more overwhelming than the physical issue.
Between the treatments, it is advised to wet the hair and comb daily with a louse-comb to remove the hatching lice. If no living lice are found, the treatment was successful, even if nits (eggs) are visible on the hair. If living lice are still present, the treatment is repeated using an anti-louse product with a different active ingredient.
Body lice may lay eggs on the host hairs and clothing, [3] but clothing is where the majority of eggs are usually secured. [4] Since body lice cannot jump or fly, they spread by direct contact with another person or more rarely by contact with clothing or bed sheets that are infested. [5]