What organism causes human monocytic ehrlichiosis and uses the lone star tick (Amblyomma americanum) as its primary vector?

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Ehrlichia chaffeensis causes human monocytic ehrlichiosis (HME), which occurs in the United States, Europe, Africa, and South and Central America.In the United States, most cases are found in the southeastern and south central states, as well as in the Mid-Atlantic States.Oklahoma, Missouri, and Arkansas account for about 35% of the cases.

What Organism Causes Human Monocytic Ehrlichiosis and Uses the Lone