| pthiriasis | Synonym: pediculosis pubis. Origin: G. Phtheiriasis, fr. Phtheir, a louse (05 Mar 2000) |
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| pthiriasis capitis | The presence of lice on the scalp, seen especially in children, with nits attached to hairs. Synonym: pthiriasis capitis. (05 Mar 2000) |
| pthiriasis corporis | The presence of body lice which live in the seams of clothing. Biting causes pruritus and excoriations. See: parasitic melanoderma. Synonym: pediculosis vestimenti, pediculosis vestimentorum, pthiriasis corporis. (05 Mar 2000) |
| pthiriasis pubis | Presence of crab lice in the pubis and other hairy areas of the trunk, and in the eyelashes of infants and young children. (05 Mar 2000) |