Tick-borne disease cases by disease U.S. 2017

This graph shows the number of tick-borne disease cases reported to the National Disease Surveillance System in the U.S. from 2013 to 2016, by disease. In the year 2013, there were 36,307 reported cases of Lyme disease which increased to 36,429 in 2016.

Number of tick-borne disease cases reported in the U.S. from 2013 to 2016, by disease

Characteristic	2013	2014	2015	2016
Lyme disease*	36,307	33,461	38,069	36,429
Anaplasmosis/Ehrlichiosis**	4,551	4,488	5,137	5,750
Spotted fever rickettsiosis***	3,359	3,757	4,198	4,269
Babesiosis****	1,796	1,760	2,100	1,910
Tularemia	203	180	314	230
Powassan virus	15	8	7	22

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Release date

May 2018

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Region

United States

Survey time period

2013 to 2016

Supplementary notes

* Lyme disease reporting changed in 2008 to include probable cases in addition to confirmed cases.
** Anaplasmosis and ehrlichiosis were reported separately after 2008 but are combined here for the entire period.
*** Includes R. rickettsii, R. parkeri, R. species 364D.
**** Surveillance data for babesiosis and malaria may be reported independently to different CDC programs; these data might vary slightly from those presented elsewhere.

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