US ARMY CENTER FOR HEALTH PROMOTION AND PREVENTIVE MEDICINE Entomological Sciences Program EHRLICHIOSIS (21 July 1994) In response to questions resulting from the recent news reports of 'new tick-borne illness causing deaths in the Midwest, ' the following information is provided: Ehrlichioses are diseases caused by rickettsia-like organisms, which are extremely small, intracellular bacteria ...

Ehrlichiosis Ehrlichiosis air-lick-ee-OH-sis is a newly recognized bacterial disease that is spread by infected ticks. Two types of human ehrlichiosis have been identified in the United States: human monocytic ehrlichiosis and human granulocytic ehrlichiosis. Most infections are mild or without symptoms, but some can be severe and life-threatening. Ehrlichiosis can usually be treated with ...