Ehrlichia


Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia.
Related to Ehrlichia: Ehrlichia canis, Ehrlichia chaffeensis

Ehrlichia

(er-lik'ē-ă),
A genus of small, often pleomorphic, coccoid to ellipsoidal, nonmotile, gram-negative bacteria (order Rickettsiales) that occur either singly or in compact inclusions in circulating mammalian leukocytes; species are the etiologic agents of ehrlichiosis and are transmitted by ticks. The type species is Ehrlichia canis.
[P. Ehrlich]

Ehrlichia

/Ehr·lich·ia/ (ār-lik´e-ah) a genus of the tribe Ehrlichieae transmitted by ticks and causing disease in dogs, cattle, sheep, horses, and humans, including the species E. ca´nis, E. chaffeen´sis, E. e´qui, and E. sennet´su.

Ehrlichia

a genus of small spherical to ellipsoidal, nonmotile gram-negative bacteria. They occur singly or in compact inclusions in circulating mammalian leukocytes. Some species are the causative agents of ehrlichiosis and are transmitted by ticks. Two human tick-borne diseases have been associated with Ehrlichia species: human monocytic ehrlichiosis caused by E. chaffeensis, and human granulocytic ehrlichiosis caused by E. equi.

Ehr·lich·i·a

(ār-lik'ē-ă)
A genus of small, often pleomorphic, coccoid to ellipsoidal, nonmotile, gram-negative bacteria (order Rickettsiales) that occur either singly or in compact inclusions in circulating mammalian leukocytes; species are the etiologic agents of ehrlichiosis and are transmitted by ticks. The type species is E. canis.
[P. Ehrlich]

Ehrlich,

Paul, German bacteriologist, immunologist, and Nobel laureate, 1854-1915.
Ehrlichia - a genus of small, often pleomorphic, coccoid to ellipsoidal, nonmotile, gram-negative bacteria (order Rickettsiales) that are the etiologic agents of ehrlichiosis and are transmitted by ticks.
Ehrlich anemia - anemia resulting from hypoplastic or aplastic bone marrow. Synonym(s): aplastic anemia
Ehrlich diazo reagent - two solutions, one of sodium nitrite, the other of acidified sulfanilic acid, used in bringing about diazotization. Synonym(s): diazo reagent
Ehrlich inner body - a round oxyphil body found in the red blood cell in case of hemocytolysis due to a specific blood poison. Synonym(s): Heinz-Ehrlich body
Ehrlich phenomenon - the difference between the amount of diphtheria toxin that will exactly neutralize one unit of antitoxin.
Ehrlich postulate - that cells contain surface extensions or side chains (haptophores) that bind to the antigenic determinants of a toxin (toxophores). Synonym(s): Synonym(s): Ehrlich theory; side-chain theory
Ehrlich test - urobilinogen test using Ehrlich reagent.
Ehrlich theory - Synonym(s): Ehrlich postulate
Ehrlich tumor - solid or ascitic transplantable tumor derived from breast carcinoma in mice.
Ehrlich unit
Ehrlich-Türk line - seldom-used term for the thin vertical deposition of material on the posterior surface of the cornea seen in uveitis.
Heinz-Ehrlich body - Synonym(s): Ehrlich inner body

Ehrlichia

a genus of bacteria in the family Anaplasmataceae, order Rickettsiales, recently reclassified so that some species are now Anaplasma and some as Neorickettsia. All are intracellular parasites of leukocytes and endothelial cells of animals or humans and require a vector for transmission. See also Rickettsia, Anaplasma, Neorickettsia.

Ehrlichia bovis
see Anaplasmabovis.
Ehrlichia canis
causes canine monocytic ehrlichiosis.
Ehrlichia equi
see Anaplasmaphagocytophila.
Ehrlichia ewingii
causes canine granulocytic ehrlichiosis.
Ehrlichia ondiri
causes ondiri disease. Called also bovine petechial fever.
Ehrlichia ovina
now Anaplasmaphagocytophila; causes benign ovine rickettsiosis.
Ehrlichia phagocytophila
see Anaplasmaphagocytophila.
Ehrlichia platys
now Anaplasmaplatys.
Ehrlichia risticii
see Neorickettsiaristicii.
Ehrlichia ruminantium
cause of heartwater in cattle and transmitted by Amblyomma spp. Previously classified as Rickettsia ruminantium and Cowdria ruminantium.
References in periodicals archive ?
Therefore, a direct autoimmune attack on the inner ear triggered by Ehrlichia infection rather than by the presence of a perivascular lymphopro liferative infiltrate might have been the mechanism for the sudden SNHL in our patients.
ank A: an Ehrlichia phagocytophila group gene encoding a cytoplasmic protein antigen with ankyrin repeats.
Prevalence of Ehrlichia, Borrelia, and rickettsial agents in Amblyomma americanum (Acari: Ixodidae) collected from nine states.
Las muestras positivas a Ehrlichia canis fueron purificadas mediante el kit comercial de QIAquick Gel Extration Minikit.
Clinical and Hematological aspects of dogs naturally infected with Ehrlichia spp.
canis, pero existe la posibilidad de que otras especies de Ehrlichia pudieran estar presentes.
Splenocytes from three uninfected mice and three mice infected with Ehrlichia muris were used.
Hasta 1991 se creia que la especie que afectaba al hombre era la Ehrlichia monocitica del perro debido a que los pacientes presentaban anticuerpos frente a este agente.
1) With the advent of new diagnostic methods, such as PCR and gene sequencing, other disease-causing species of Ehrlichia may be identified in the near future.
Ehrlichia chaffeensis is an obligatory intracellular, tick-transmitted bacterium that is maintained in nature in a cycle involving at least one and perhaps several vertebrate reservoir hosts.
Other sequences represented in the top 50 scores were primarily from Anaplasma species, although Ehrlichia risticii was indicated.