Data & Statistics

Annual Summaries

 

Number and incidence of reported cases of babesiosis, by state and year, 2011–2018*

 

2011

2012

2013

2014

2015

2016

2017

2018

State

No.

Rate‡

No.

Rate

No.

Rate

No.

Rate

No.

Rate

No.

Rate

No.

Rate

No.

Rate

Alabama

1

<0.1

0

0.0

0

0.0

1

<0.1

2

<0.1

0

0.0

1

<0.1

0

0

Alaska§

Arizona

0

0

Arkansas

0

0.0

1

<0.1

0

0.0

2

<0.1

California

1

<0.1

4

<0.1

3

<0.1

3

<0.1

5

<0.1

3

<0.1

4

<0.1

6

<0.1

Colorado§

Connecticut

74

2.1

123

3.4

268

7.5

205

5.7

328

9.1

322

9.0

309

8.6

248

6.9

Delaware

1

0.1

0

0.0

2

0.2

1

0.1

1

0.1

2

0.2

4

0.4

3

0.3

District of
Columbia

2

0.3

Florida

9

<0.1

19

<0.1

Georgia

0

0

Hawaii§

Idaho§

Illinois

1

<0.1

3

<0.1

2

<0.1

0

0.0

1

<0.1

Indiana

0

0.0

1

<0.1

1

<0.1

0

0.0

0

0.0

0

0.0

1

<0.1

1

<0.1

Iowa

2

0.1

0

Kansas

0

0

Kentucky

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

Maine

9

0.7

10

0.8

36

2.7

42

3.2

55

4.1

82

6.2

118

8.8

101

7.5

Maryland

4

0.1

3

0.1

9

0.2

2

<0.1

4

0.1

6

0.1

5

<0.1

7

0.1

Massachusetts

208

3.1

261

3.9

417

6.2

535

7.9

444

6.

517

7.6

591

8.6

527

7.6

Michigan

0

0.0

0

0.0

2

<0.1

2

<0.1

3

<0.1

2

<0.1

3

<0.1

1

<0.1

Minnesota

73

1.4

41

0.8

64

1.2

49

0.9

45

0.8

50

0.9

60

1.1

49

0.9

Mississippi§

Missouri

1

<0.1

0

0.0

0

0

Montana

0

0.0

0

0.0

1

0.1

0

0.0

0

0

Nebraska

0

0.0

1

0.1

1

0.1

0

0.0

0

0.0

1

0.1

0

0.0

0

0

Nevada

New Hampshire§

13

1.0

19

1.4

22

1.7

42

3.2

53

4.0

13

1.0

78

5.8

37

2.7

New Jersey

166

1.9

92

1.0

171

1.9

159

1.8

281

3.1

174

1.9

193

2.1

247

2.8

New Mexico§

New York

418

2.1

253

1.3

534

2.7

471

2.4

581

2.9

430

2.2

696

3.5

641

3.3

North Carolina§

North Dakota

1

0.1

0

0.0

1

0.1

0

0.0

3

0.4

1

0.1

0

0.0

1

0.1

Ohio

1

<0.1

2

<0.1

1

<0.1

4

<0.1

Oklahoma§

Oregon

1

<0.1

0

0.0

0

0.0

1

<0.1

2

<0.1

2

<0.1

5

0.1

2

<0.1

Pennsylvania§

Rhode Island

73

6.9

56

5.3

142

13.5

172

16.3

190

18.0

155

14.7

161

15.2

165

15.6

South Carolina

1

<0.1

3

0.1

2

<0.1

2

<0.1

2

<0.1

1

<0.1

South Dakota

1

0.1

1

0.1

0

0.0

0

0.0

0

0.0

0

0

Tennessee

1

<0.1

0

0.0

0

0.0

0

0.0

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

Utah

0

0.0

0

0.0

0

0.0

1

<0.1

1

<0.1

Vermont

2

0.3

2

0.3

6

1.0

3

0.5

9

1.4

15

2.4

22

3.5

21

3.4

Virginia

0

0.0

5

<0.1

Washington

0

0.0

0

0.0

1

<0.1

4

0.1

2

<0.1

0

0.0

1

<0.1

0

0

West Virginia

0

0.0

0

0.0

0

0.0

0

0.0

1

0.1

1

<0.1

Wisconsin

80

1.4

45

0.8

76

1.3

43

0.7

56

1.0

68

1.2

88

1.5

64

1.1

Wyoming

0

0.0

0

0.0

0

0.0

0

0.0

0

0.0

0

0.0

0

0.0

0

0

Total¶

1,126

0.8

911

0.6

1,761

1.0

1,742

0.8

2,074

0.9

1,909

0.8

2,358

0.9

2161

0.77

* 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: July 22, 2020