| Ehrlich-Turk line | Seldom-used term for the vertical, thin deposition of material on the posterior surface of the cornea in uveitis. (05 Mar 2000) |
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| ehrlichia | Small, often pleomorphic, coccoid to ellipsoidal organisms occurring intracytoplasmically in circulating lymphocytes. They are the aetiologic agents of tick-borne diseases of humans, dogs, cattle, sheep, goats, and horses. (12 Dec 1998) |
| Ehrlichia canis | The species causing the tick borne disease canine ehrlichiosis in dogs (transmitted by the tick Rhipicephalus sanguineus); it is the type species of the genus Ehrlichia. Occasionally causes tick borne infection in humans. (05 Mar 2000) |
| ehrlichia chaffeensis | A species of gram-negative bacteria that is the causative agent of human ehrlichiosis. This organism was first discovered at fort chaffee, arkansas, when blood samples from suspected human ehrlichiosis patients were studied. (12 Dec 1998) |
| Ehrlichia ondiri | The species causing bovine petechial fever. (05 Mar 2000) |
| Ehrlichia platys | The species causing canine infectious cyclic thrombocytopenia in dogs. (05 Mar 2000) |
| Ehrlichia risticii | The species causing equine monocytic ehrlichiosis. (05 Mar 2000) |
| Ehrlichia sennetsu | The species causing Sennetsu fever in humans. Synonym: Rickettsia sennetsu. (05 Mar 2000) |
| ehrlichieae | A tribe of gram-negative bacteria of the family rickettsiaceae whose organisms are pathogenic for certain mammals, including man. Certain species are adapted to existence in invertebrates, especially arthropods. (12 Dec 1998) |
| ehrlichiosis | <microbiology> An infectious disease transmited by the bite of an infected tick. Produces manifestations similar to that of Rocky Mountain spotted fever. Infection is due to a parasitic leukocytic rickettsiae of the genus Ehrlichia. (27 Sep 1997) |