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human monocytic ehrlichiosis

   Also found in: Encyclopedia 0.01 sec.
ehrlichiosis /ehr·lich·i·osis/ (ār-lik″e-o´sis) a febrile illness due to infection with bacteria of the genus Ehrlichia.
human granulocytic ehrlichiosis  a sometimes fatal human ehrlichiosis caused by an Ehrlichia equi –like species, characterized by flulike symptoms and involving predominantly neutrophils.
human monocytic ehrlichiosis  a sometimes fatal human ehrlichiosis caused by Ehrlichia chaffeensis, characterized by flulike symptoms and involving predominantly fixed tissue mononuclear phagocytes.

human monocytic ehrlichiosis.
human monocytic ehrlichiosis
Infectious disease An infection by Ehrlichia chaffeensis Vector Lone Star tick–Amblyomma americanum, possibly also Dermacentor variabilis Reservoir Deer, possibly dogs or others Regions US, Europe, Africa Clinical Fever, malaise, headache, myalgia, rigors, sweating, anorexia, arthralgia, N&V, pharyngitis, rash, cough, diarrhea; with progression of HME, fever, headache, myalgia, anorexia, and arthralgia become more intense Lab CSF pleocytosis, E chaffeensis inclusions in monocytes, spleen and other tissues, BM hyperplasia–58%, hypoplasia–17% Diagnosis Romanovsky stains of circulating monocytes, EM, indirect immunofluorescence, PCR Complications Meningitis, interstitial pneumonia, GI and pulmonary hemorrhage, disseminated hemorrhage. Cf Human granulocytic ehrlichiosis.


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scapularis and the lone-star tick, Amblyomma americanum, which is a vector of human monocytic ehrlichiosis in the United States.
Human monocytic ehrlichiosis (HME) is caused by Ehrlichia chaffeensis, which is transmitted by the lone star tick (Amblyomma americanum).
Although it is very rare to contract disease from ticks, they have been known to spread the following disease to man: - Babesiosis - Rocky mountain spotted fever - Lyme disease - Human Granulocytic Ehrlichiosis (HGE) - Human Monocytic Ehrlichiosis (HME) - Colorado tick fever - Relapsing fever - Q fever - Tick paralysis - Tularemia The type of disease contracted depends on the location, type of tick, duration of the tick''s attachment to the host''s skin and season of the year.
 
 
 
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