Babesiosis Maps

Number* of reported cases of babesiosis, by county of residence — 40 states, 2020†, ‡

map_2020

* N = 1,826; county of residence was known for all but 1 (<1%) of the 1,827 total case-patients. See the Appendix for the maps for surveillance years 2011–2019.
† Year as reported by the health department.
‡ 2020 data may be lower or higher than previous years. COVID-19 likely had an impact on public health activities including case identification, case investigations (limited case investigations or none), as well as possibly impacting transmission rates. This may reflect the impact of isolation and prevention measures, whether people sought health care when they were ill, and other changes in behavior during the COVID-19 pandemic period.

Number* of reported cases of babesiosis, by county of residence — 40 states, 2019

map_2018

* N = 2,417; county of residence was known for all but 1 (<1%) of the 2,418 total case-patients. See the Appendix for the maps for surveillance years 2011–2018.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 40 states, 2018†

map_2018

* N = 2,144; county of residence was known for all but 17 (1%) of the 2,161 total case-patients. See the Appendix for the maps for surveillance years 2011–2017.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 37 states, 2017†

 

map_2017

* N = 2,324; county of residence was known for all but 34 (1%) of the 2,358 total case-patients.

  • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
  • Surveillance for babesiosis was conducted by 37 states in 2017.
  • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 35 states, 2016†

 

map_2016

* N = 1,889; county of residence was known for all but 20 (1%) of the 1,909 total case-patients.

  • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
  • Surveillance for babesiosis was conducted by 35 states in 2016.
  • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 33 states, 2015†

 

map_2015

* N = 2,070; county of residence was known for all but 4 (<1%) of the 2,074 total case-patients.

  • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
  • Surveillance for babesiosis was conducted by 33 states in 2015.
  • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 31 states, 2014†

 

* N = 1,731; county of residence was known for all but 13 (1%) of the 1,744 total case-patients.

  • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
  • Surveillance for babesiosis was conducted by 31 states in 2014.
  • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 27 states, 2013†

* N = 1,749; county of residence was known for all but 12 (1%) of the 1,761 total case-patients.

  • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
  • Surveillance for babesiosis was conducted by 27 states in 2013.
  • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 22 states, 2012†

 

* N = 904; county of residence was known for all but 7 (1%) of the 911 total case-patients.

  • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
  • Surveillance for babesiosis was conducted by 22 states in 2012.
  • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.

Number* of reported cases of babesiosis, by county of residence — 22 states, 2011†

* N = 1,117; county of residence was known for all but 9 (1%) of the 1,126 total case-patients.

    • Cases are mapped to the patients’ county of residence, which was not necessarily where they became infected.
    • Surveillance for babesiosis was conducted by 22 states in 2011.
    • Babesiosis was not a reportable disease in the gray states, and health departments in those states did not notify CDC of cases.

† Year as reported by the health department.