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Head lice are gray, but some can feature other colors. After feeding, they may look reddish. Body lice live on human clothing and visit their hosts only if they need to feed.
Head lice, like other insects of the order Phthiraptera, are hemimetabolous. [ 1 ] [ 10 ] Newly hatched nymphs will moult three times before reaching the sexually mature adult stage. [ 1 ] Thus, mobile head lice populations may contain eggs, nits, three nymphal instars , and the adults (male and female) ( imago ). [ 1 ]
Head lice are spread through direct head-to-head contact with an infested person. 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.
Head lice feed on blood several times each day and tend to reside close to your scalp, which explains the itchiness and why it’s sometimes so difficult to tell that you have head lice. Unlike ...
A visual exam is one way to see if your child has head lice. With gloves, part different sections of hair and look for poppy seed-size insects crawling on the scalp or base of the hair shaft.
Head lice are spread by direct contact with the hair of someone who is infected. [4] The cause of head lice infestations in children is not related to cleanliness. [5] Other animals, such as cats and dogs, do not play a role in transmission. [4] Head lice feed only on human blood and are only able to survive on human head hair.
Louse (pl.: lice) is the common name for any member of the clade Phthiraptera, which contains nearly 5,000 species of wingless parasitic insects.Phthiraptera has variously been recognized as an order, infraorder, or a parvorder, as a result of developments in phylogenetic research.
'Tis the season for pesky head lice. Check out this round-up of the best lice treatment options, from over-the-counter medications to louse and nit combing.