Data & Statistics

Annual Summaries

 

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.

 

Page last reviewed: November 4, 2021