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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 ...
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.
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 ...
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.
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]
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]
Mons pubis: a mass of fatty tissue where the pubic hair grows. Vulval vestibule: an almond-shaped area between the labia minora that contains the openings. Urinary meatus: the opening of the urethra for urine to pass through. Vaginal opening: entrance to the vagina. Hymen: connective tissue that covers the vaginal opening.
The mons pubis is a soft mound of fatty tissue in the pubic region covering the pubic bone. [3] Mons pubis is Latin for "pubic mound" and is present in both sexes to act as a cushion during sexual intercourse, and is more pronounced in the female. [4] The variant term mons veneris ('mound of Venus') is used specifically for females. [5] [4]