In 2008, human infection by a Panola Mountain (in Georgia, USA) "Ehrlichia" species was reported. On August 3, 2011, infection by a yet-unnamed bacterium in the genus "Ehrlichia" was reported, carried by deer ticks and causing flu-like symptoms in at least 25 people in Minnesota and Wisconsin. Until then, human ehrlichiosis was thought to be very rare or absent in both states. The new species, which is genetically very similar to an "Ehrlichia" species found in Eastern Europe and Japan called "E. muris", was identified at a Mayo Clinic Health System hospital in Eau Claire.