Data & Statistics
Annual Summaries
- Surveillance for Babesiosis – United States, 2019 (August 12, 2021)pdf icon
- Surveillance for Babesiosis – United States, 2018 (April 22, 2019)pdf icon
- Surveillance for Babesiosis – United States, 2017 (June 27, 2019)pdf icon
- Surveillance for Babesiosis – United States, 2016 (June 27, 2019)pdf icon
- Surveillance for Babesiosis – United States, 2015 (June 27, 2019)pdf icon
- Surveillance for Babesiosis – United States, 2014 (February 29, 2016)pdf icon
Number and incidence of reported cases of babesiosis, by state and year, 2013–2018*
|
2013 |
2014 |
2015 |
2016 |
2017 |
2018 |
2019 |
||||||||
| State† |
No. |
Rate |
No. |
Rate |
No. |
Rate |
No. |
Rate |
No. |
Rate |
No. |
Rate |
No. |
Rate |
| Alabama |
0 |
0.0 |
1 |
<0.1 |
2 |
<0.1 |
0 |
0.0 |
1 |
<0.1 |
0 |
0 |
0 |
0 |
| Alaska§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Arizona |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
0 |
0 |
0 |
0 |
| Arkansas |
— |
— |
— |
— |
0 |
0.0 |
1 |
<0.1 |
0 |
0.0 |
2 |
<0.1 |
1 |
<0.1 |
| California |
3 |
<0.1 |
3 |
<0.1 |
5 |
<0.1 |
3 |
<0.1 |
4 |
<0.1 |
6 |
<0.1 |
2 |
<0.1 |
| Colorado§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Connecticut |
268 |
7.5 |
205 |
5.7 |
328 |
9.1 |
322 |
9.0 |
309 |
8.6 |
248 |
6.9 |
323 |
9.0 |
| Delaware |
2 |
0.2 |
1 |
0.1 |
1 |
0.1 |
2 |
0.2 |
4 |
0.4 |
3 |
0.3 |
3 |
0.3 |
| District of Columbia |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
2 |
0.3 |
0 |
0.0 |
| Florida |
— |
— |
— |
— |
— |
— |
— |
— |
9 |
<0.1 |
19 |
<0.1 |
24 |
<0.1 |
| Georgia |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
0 |
0 |
1 |
<0.1 |
| Hawaii§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Idaho§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Illinois |
— |
— |
1 |
<0.1 |
3 |
<0.1 |
2 |
<0.1 |
0 |
0.0 |
1 |
<0.1 |
1 |
<0.1 |
| Indiana |
1 |
<0.1 |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
1 |
<0.1 |
1 |
<0.1 |
0 |
0.00 |
| Iowa |
— |
— |
— |
— |
— |
— |
— |
— |
2 |
0.1 |
0 |
0 |
0 | 0 |
| Kansas |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
0 |
0 |
0 |
0 |
| Kentucky |
— |
— |
— |
— |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0 |
0 |
0 |
| Louisiana |
2 |
<0.1 |
0 |
0.0 |
1 |
<0.1 |
0 |
0.0 |
1 |
<0.1 |
1 |
<0.1 |
0 |
0 |
| Maine |
36 |
2.7 |
42 |
3.2 |
55 |
4.1 |
82 |
6.2 |
118 |
8.8 |
101 |
7.5 |
138 |
10.3 |
| Maryland |
9 |
0.2 |
2 |
<0.1 |
4 |
0.1 |
6 |
0.1 |
5 |
<0.1 |
7 |
0.1 |
7 |
0.1 |
| Massachusetts |
417 |
6.2 |
535 |
7.9 |
444 |
6. |
517 |
7.6 |
591 |
8.6 |
527 |
7.6 |
636 |
9.2 |
| Michigan |
2 |
<0.1 |
2 |
<0.1 |
3 |
<0.1 |
2 |
<0.1 |
3 |
<0.1 |
1 |
<0.1 |
1 |
<0.1 |
| Minnesota |
64 |
1.2 |
49 |
0.9 |
45 |
0.8 |
50 |
0.9 |
60 |
1.1 |
49 |
0.9 |
55 |
1.0 |
| Mississippi§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Missouri |
— |
— |
— |
— |
— |
— |
1 |
<0.1 |
0 |
0.0 |
0 |
0 |
1 |
<0.1 |
| Montana |
— |
— |
0 |
0.0 |
0 |
0.0 |
1 |
0.1 |
0 |
0.0 |
0 |
0 |
0 |
0 |
| Nebraska |
1 |
0.1 |
0 |
0.0 |
0 |
0.0 |
1 |
0.1 |
0 |
0.0 |
0 |
0 |
0 |
0 |
| Nevada§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| New Hampshire§ |
22 |
1.7 |
42 |
3.2 |
53 |
4.0 |
13 |
1.0 |
78 |
5.8 |
37 |
2.7 |
63 |
4.6 |
| New Jersey |
171 |
1.9 |
159 |
1.8 |
281 |
3.1 |
174 |
1.9 |
193 |
2.1 |
247 |
2.8 |
236 |
2.6 |
| New Mexico§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| New York |
534 |
2.7 |
471 |
2.4 |
581 |
2.9 |
430 |
2.2 |
696 |
3.5 |
641 |
3.3 |
663 |
3.4 |
| North Carolina§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| North Dakota |
1 |
0.1 |
0 |
0.0 |
3 |
0.4 |
1 |
0.1 |
0 |
0.0 |
1 |
0.1 |
0 |
0.0 |
| Ohio |
— |
— |
1 |
<0.1 |
2 |
<0.1 |
— |
— |
1 |
<0.1 |
4 |
<0.1 |
4 |
<0.1 |
| Oklahoma§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Oregon |
0 |
0.0 |
1 |
<0.1 |
2 |
<0.1 |
2 |
<0.1 |
5 |
0.1 |
2 |
<0.1 |
2 |
<0.1 |
| Pennsylvania§ |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
— |
| Rhode Island |
142 |
13.5 |
172 |
16.3 |
190 |
18.0 |
155 |
14.7 |
161 |
15.2 |
165 |
15.6 |
158 |
14.9 |
| South Carolina |
1 |
<0.1 |
3 |
0.1 |
2 |
<0.1 |
2 |
<0.1 |
2 |
<0.1 |
1 |
<0.1 |
0 |
0 |
| South Dakota |
1 |
0.1 |
1 |
0.1 |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0 |
0 |
0 |
| Tennessee |
0 |
0.0 |
0 |
0.0 |
1 |
<0.1 |
1 |
<0.1 |
1 |
<0.1 |
1 |
<0.1 |
1 |
<0.1 |
| Texas |
1 |
<0.1 |
1 |
<0.1 |
1 |
<0.1 |
1 |
<0.1 |
0 |
0.0 |
2 |
<0.1 |
2 |
<0.1 |
| Utah |
— |
— |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
1 |
<0.1 |
1 |
<0.1 |
0 |
0 |
| Vermont |
6 |
1.0 |
3 |
0.5 |
9 |
1.4 |
15 |
2.4 |
22 |
3.5 |
21 |
3.4 |
34 |
5.4 |
| Virginia |
— |
— |
— |
— |
— |
— |
— |
— |
0 |
0.0 |
5 |
<0.1 |
1 |
<0.1 |
| Washington |
1 |
<0.1 |
4 |
0.1 |
2 |
<0.1 |
0 |
0.0 |
1 |
<0.1 |
0 |
0 |
1 |
<0.1 |
| West Virginia |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
1 |
0.1 |
1 |
<0.1 |
0 |
<0.1 |
| Wisconsin |
76 |
1.3 |
43 |
0.7 |
56 |
1.0 |
68 |
1.2 |
88 |
1.5 |
64 |
1.1 |
58 |
1.0 |
| Wyoming |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0.0 |
0 |
0 |
0 |
0 |
| Total¶ |
1,761 |
1.0 |
1,742 |
0.8 |
2,074 |
0.9 |
1,909 |
0.8 |
2,358 |
0.9 |
2,161 |
0.77 |
2,418 |
0.86 |
* Year as reported by the health department
† Cases were reported by state of residence, which was not necessarily the state of exposure.
‡ Rate per 100,000 population (10)
§ Babesiosis is not a reportable condition by law in these states
¶ The denominators for calculations of total incidence rates included only the populations of states in which babesiosis was a reportable condition during the pertinent year.