| mycoplasma penetrans | A species of gram-negative, facultatively anaerobic bacteria. This organism shows remarkable pathobiologic properties: it adheres to cell surfaces, deeply penetrates into the cell, and strongly adsorbs human red blood cells and human CD4+ lymphocytes and monocytes. M. Penetrans was first isolated from the urogenital tract of patients with aids and high frequencies of antibodies to it are seen in HIV-infected patients. (12 Dec 1998) |
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| Sarcopsylla penetrans | <entomology> A member of the flea family, Tungidae, commonly known as chigger flea, sand flea, chigoe, or jiggers. The minute female penetrates the skin, frequently under the toenails; as she becomes distended with eggs to about pea size, a painful ulcer with inflammation develops at the site. Synonym: Sarcopsylla penetrans. (05 Mar 2000) |
| Pulex penetrans | Incorrect name for Tunga penetrans. (05 Mar 2000) |
| hyperkeratosis penetrans | Discrete and confluent horny follicular plugs on a crateriform base, often occurring on the arms and legs in diabetics with renal failure; possibly a severe form of perforating folliculitis. Synonym: hyperkeratosis penetrans, Kyrle's disease. (05 Mar 2000) |
| Tunga penetrans | <entomology> A member of the flea family, Tungidae, commonly known as chigger flea, sand flea, chigoe, or jiggers. The minute female penetrates the skin, frequently under the toenails; as she becomes distended with eggs to about pea size, a painful ulcer with inflammation develops at the site. Synonym: Sarcopsylla penetrans. (05 Mar 2000) |
| ulcus | Synonym: ulcer. Origin: L. (05 Mar 2000) |
| ulcus ambulans | <dermatology> A rapidly spreading ulcer attended by the formation of extensive sloughing. Synonym: perambulating ulcer, sloughing ulcer, ulcus ambulans. Origin: L. Phagedaena, Gr Phago, To eat. (05 Mar 2000) |
| ulcus cruris | <pathology> Ulcer of the foot (18 Nov 1997) |
| ulcus hypostaticum | <dermatology> A chronic ulcer that appears in pressure areas in debilitated patients confined to bed or otherwise immobilised, due to a circulatory defect from the enhanced tissue pressure in high-contact areas, often occurring over a bony prominence (for example sacral decubitus). (27 Sep 1997) |
| ulcus terebrans | An obsolete term for an invasive basal cell carcinoma, usually around the eye, nose, or ear, and extending to underlying bony tissue. (05 Mar 2000) |
| ulcus venereum | <dermatology> The primary skin lesion of syphilis which begins at the site of infection after an interval of 10-30 days as a papule or red ulcerated skin lesion. (27 Sep 1997) |
| ulcus vulvae acutum | A simple acute ulceration of the vulva or lower vagina of nonvenereal origin. Synonym: ulcus vulvae acutum. (05 Mar 2000) |