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Lice are divided into two groups: sucking lice, which obtain their nourishment from feeding on the sebaceous secretions and body fluids of their host; and chewing lice, which are scavengers, feeding on skin, fragments of feathers or hair, and debris found on the host's body. Many lice are specific to a single species of host and have co-evolved ...
At least three species or subspecies of Anoplura are parasites of humans; the human condition of being infested with sucking lice is called pediculosis. Pediculus humanus is divided into two subspecies, Pediculus humanus humanus , or the human body louse , sometimes nicknamed "the seam squirrel" for its habit of laying of eggs in the seams of ...
Pubic lice (Pthirus pubis) have three stages: the egg (also called a nit), the nymph, and the adult. They can be hard to see and are found firmly attached to the hair shaft. They are oval and usually yellow to white. Pubic lice nits take about 6–10 days to hatch. The nymph is an immature louse that hatches from the nit (egg).
The nymph will molt three times before the adult louse emerges. The nymph usually takes 9–12 days to develop into an adult louse. [14] The adult body louse is about 2.5–3.5 mm long, and like a nymph it has six legs. It is wingless and is tan to grayish-white in color. Life cycle of Pediculus humanus capitis, which is similar to the body ...
Most adult species are light tan to brown in color and are usually 1–4 mm in length, although some livestock species can grow to be 5–7 mm, and some wild bird species can even get to 10 mm. [2] Mallophaga are often adapted to live on a specific part of their host and typically spend their entire lives on a single host.
The result is called steatorrhea, which is bulky, smelly, and pale-colored stool that often floats in the toilet instead of sinking to the bottom due to its fatty or oily content.
Accordingly, the infestation with head lice is named pediculosis capitis, while this with body lice, pediculosis corporis. [ 1 ] [ 2 ] Although pediculosis in humans may properly refer to lice infestation of any part of the body, the term is sometimes used loosely to refer to pediculosis capitis , the infestation of the human head with the ...
Menoponidae is a monophyletic family of lice in the superfamily of chewing lice, Amblycera, often referred to as the chicken body louse family. [1] They are ectoparasites of a wide range of birds including chickens, which makes them important to understand for veterinary science and for human health.