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louse[lows] (pl. lice)
any of various grayish, wingless insects parasitic on birds and mammals, including humans; they are usually one sixteenth to one sixth of an inch (0.15 to 0.4 cm) long. Lice are classified into two orders, Anoplura (the sucking lice) and Mallophaga (the bird lice or biting lice). The causal organisms of typhus, relapsing fever, trench fever, and other diseases are transmitted by the bites of lice. The most important species parasitic on humans are Pediculus humanus capitis, the head louse, which attaches itself to the hairs of the head; P. humanus corporis, the body or clothes louse; and Phthirus pubis, the crab louse, which lives in the pubic hair, eyelashes, and eyebrows. Endemics of head lice infestations occur most frequently in school children. Pubic lice are often sexually transmitted. Louse infestation is called pediculosis.
Common name for members of the ectoparasitic insect orders Anoplura (sucking lice) and Mallophaga (biting lice). Important species are Felicola subrostrata (cat louse), Goniocotes gallinae (fluff louse), Goniodes dissimilis (brown chicken louse), Haemodipsus ventricosus (rabbit louse), Lipeurus caponis (wing louse), Menacanthus stramineus (chicken body louse), Pthirus pubis (crab or pubic louse), and Polyplax serratus (mouse louse).
louse(lous) pl. lice any of various parasitic insects; species parasitic on humans are Pediculus humanus capitis (head l.), P. humanus corporis (body, or clothes, l.), and Phthirus pubis (crab, or pubic, l.). Lice are major vectors of typhus, relapsing fever, and trench fever.
pl. lice (līs) Any of numerous small, flat-bodied, wingless biting or sucking insects of the order Phthiraptera, which live as external parasites on birds and mammals, including humans. The lice are sometimes classified together with the psocids in the order Psocodea.
louseA flat wingless parasitic insect
Of Lice & Men
Biting lice, Order Mallophaga, which rarely affect humans
Sucking lice, Order Anoplua, family Pediculidae, which are global in distribution, and serve as either
• Disease vectors, eg Borrelia recurrentis–Bhermisi turcatae, B parkeri or
• Themselves cause disease—Pediculus humanis capitis, head lice, Pediculus humanis corporis, body lice, Phthirus pubis, crabs, pubic lice
louse, pl. lice (lows, līs)
Common name for members of the ectoparasitic insect orders Anoplura (sucking lice) and Mallophaga (biting lice).
body lousePediculus humanus corporis.
clothes louseSee: Pediculus humanus corporis
Phthirus inguinalis and Phthirus pubis; the louse that infests the pubic region and other hairy areas of the body. See: pediculosis
head lousePediculus humanus capitis. See: illustration
louseany wingless insect of the order Mallophaga (bird lice or biting lice) or the order Anopleura (sucking lice).
pl. lice; a general name for various species-specific parasitic insects, the true lice, which infest mammals and belong to the order Phthiraptera. This is divided into two suborders, Mallophaga, the biting lice, and Anoplura, the sucking lice. They are grayish, wingless, dorsoventrally flattened, and vary in length from about 1.5 to 4 mm. They stimulate rubbing, scratching and restlessness, causing damage to fleece and loss of production. Heavy infestations with sucking lice may cause serious anemia. Louse infestation is also called pediculosis.
The term louse is also used loosely with respect to other external parasites, e.g. whale 'lice' are barnacles and small copepods.