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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) . [1]
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.
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.
Head lice are most common among young children — 6 million to 12 million lice outbreaks occur yearly in children between 3 and 11 in the US — though adults are vulnerable to head lice as well.
Bird lice may feed on feathers, skin, or blood. They have no wings, and their biting mouth parts distinguish them from true lice, which suck blood. [1] [2] Almost all domestic birds are hosts for at least one species of bird louse. Chickens and other poultry are attacked by many kinds of bird lice. [2]
Head lice spread quickly and only affect humans. There are also plenty of myths about lice that won't go away—including ways that lice spread. Here are some ways you think you could get lice ...
Whale lice attach themselves to the host body in places that protect them from water currents, so they can be found in natural body openings and in wounds; with baleen whales they are found primarily on the head and in the ventral pleats. Around 7,500 whale lice live on a single whale. [3]
Psocodea is a taxonomic group of insects comprising the bark lice, book lice and parasitic lice. [2] It was formerly considered a superorder, but is now generally considered by entomologists as an order.
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