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Pediculosis pubis (also known as "crabs" and "pubic lice") is an infestation by the pubic louse, Pthirus pubis, a wingless insect which feeds on blood and lays its eggs (nits) on mainly pubic hair. Less commonly, hair near the anus, armpit, beard, eyebrows, moustache, and eyelashes may be involved.
The crab louse or pubic louse (Pthirus pubis) is an insect that is an obligate ectoparasite of humans, feeding exclusively on blood. [2] The crab louse usually is found in the person's pubic hair . Although the louse cannot jump, it can also live in other areas of the body that are covered with coarse hair, such as the perianal area , the ...
Pthirus gorillae infests gorillas, [5] and Pthirus pubis afflicts humans, and is commonly known as the crab louse or pubic louse. [6] The two species diverged some 3.3 million years ago. [7] Since 1958 the generic name Pthirus has been spelled with pth rather than phth, despite this being based on a misspelling of the Greek-derived phthirus. [3 ...
P. gorillae and P. pubis (the crab louse) are the only known species that belong to the genus Pthirus, often incorrectly spelled as Phthirus (the Greek word for louse is phthir). [3] It is suggested that it is transmitted among its hosts by social grooming, shared bedding and sexual contact. [4] All species of sucking lice feed on blood. [5]
The body louse (Pediculus humanus humanus, also known as Pediculus humanus corporis) or the cootie is a hematophagic ectoparasite louse that infests humans. [1] It is one of three lice which infest humans, the other two being the head louse, and the crab louse or pubic louse.
Pediculus humanus capitis by Des Helmore. The head louse (Pediculus humanus capitis) is an obligate ectoparasite of humans. [1] Head lice are wingless insects that spend their entire lives on the human scalp and feed exclusively on human blood. [1]
Sucking lice (Anoplura, formerly known as Siphunculata) have around 500 species and represent the smaller of the two traditional superfamilies of lice.As opposed to the paraphyletic chewing lice, which are now divided among three suborders, the sucking lice are monophyletic.
The linea terminalis or innominate line consists of the pubic crest, pectineal line (pecten pubis), the arcuate line, the sacral ala, and the sacral promontory. [1]It is the pelvic brim, which is the edge of the pelvic inlet.