Phthirus
Synonyms
Crab Lice
Crab Lices
Crab Louse
Crab Louses
Lice, Crab
Lices, Crab
Louse, Crab
Louses, Crab
Lice of the genus Phthirus, family Pediculidae. Phthirus pubis, the crab louse, is usually acquired by sexual contact or contact with infected objects. It is found most frequently in the pubic hair, but also on eyebrows, eyelashes, or on the axillary hairs.