Figure 2.
Babesiosis yearly case count in Pennsylvania from 2005 to 2015, including confirmed cases from 2005 to 2010 based on identification of intraerythrocytic Babesia organisms on blood smear, and confirmed and probable cases for 2011 to 2015 based on the 2011 CDC case definition.2 The true incidence is likely higher because reporting of babesiosis is not mandatory in Pennsylvania.