First cases of acute human granulocytic ehrlichiosis in Poland

The first three cases of acute human granulocytic ehrlichiosis in Poland ar e described. Blood samples were tested by an indirect immunofluorescence me thod to detect specific serum antibodies, and the polymerase chain reaction was used to detect ehrlichial DNA. Additionally, peripheral blood smears w ere examined for the presence of morulae. According to criteria of the Cent ers for Disease Control and Prevention, all three cases can be classified a s confirmed granulocytic ehrlichiosis. Using the criteria recommended by a consensus group, however, two cases can be classified as confirmed granuloc ytic ehrlichiosis and one case as probable granulocytic ehrlichiosis.