Volume 26, Number 8—August 2020
Rise in Babesiosis Cases, Pennsylvania, USA, 2005–2018
|Laboratory criteria for diagnosis||Clinical criteria for diagnosis|
|Identification of intraerythrocytic Babesia organisms by light microscopy in a Giemsa, Wright, or Wright-Giemsa–stained blood smear; OR detection of Babesia microti DNA in a whole blood specimen by PCR; OR detection of Babesia spp. genomic sequences in a whole blood specimen by nucleic acid amplification; OR Isolation of Babesia organisms from a whole blood specimen by animal inoculation.||Objective: >1 of the following: fever, anemia, or thrombocytopenia|
|Subjective: >1 of the following: chills, sweats, headache, myalgia, or arthralgia.|
*Includes cases that have confirmatory laboratory results and meet >1 of the objective or subjective clinical evidence criteria, regardless of the mode of transmission (can include clinically manifest cases in transfusion recipients or blood donors). Full case definition available at https://wwwn.cdc.gov/nndss/conditions/babesiosis/case-definition/2011.