Data & Statistics

Annual Summaries

 

Number and incidence of reported cases of babesiosis, by state and year, 2011–2017*

2011

2012

2013

2014

2015

2016

2017

State

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

Alaska

—§

Arizona

Arkansas

0

0.0

1

<0.1

0

0.0

California

1

<0.1

4

<0.1

3

<0.1

3

<0.1

5

<0.1

3

<0.1

4

<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

Delaware

1

0.1

0

0.0

2

0.2

1

0.1

1

0.1

2

0.2

4

0.4

District of
Columbia

Florida

9

<0.1

Georgia

Hawaii

Idaho

Illinois

1

<0.1

3

<0.1

2

<0.1

0

0.0

Indiana

0

0.0

1

<0.1

1

<0.1

0

0.0

0

0.0

0

0.0

1

<0.1

Iowa

2

0.1

Kansas

Kentucky

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

Maine

9

0.7

10

0.8

36

2.7

42

3.2

55

4.1

82

6.2

118

8.8

Maryland

4

0.1

3

0.1

9

0.2

2

<0.1

4

0.1

6

0.1

5

<0.1

Massachusetts

208

3.1

261

3.9

417

6.2

535

7.9

444

6.

517

7.6

591

8.6

Michigan

0

0.0

0

0.0

2

<0.1

2

<0.1

3

<0.1

2

<0.1

3

<0.1

Minnesota

73

1.4

41

0.8

64

1.2

49

0.9

45

0.8

50

0.9

60

1.1

Mississippi

Missouri

1

<0.1

0

0.0

Montana

0

0.0

0

0.0

1

0.1

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

Nevada

New Hampshire

13

1.0

19

1.4

22

1.7

42

3.2

53

4.0

13

1.0

78

5.8

New Jersey

166

1.9

92

1.0

171

1.9

159

1.8

281

3.1

174

1.9

193

2.1

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

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

Ohio

1

<0.1

2

<0.1

1

<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

Pennsylvania

Rhode Island

73

6.9

56

5.3

142

13.5

172

16.3

190

18.0

155

14.7

161

15.2

South Carolina

1

<0.1

3

0.1

2

<0.1

2

<0.1

2

<0.1

South Dakota

1

0.1

1

0.1

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

Texas

1

<0.1

1

<0.1

1

<0.1

1

<0.1

0

0.0

Utah

0

0.0

0

0.0

0

0.0

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

Virginia

0

0.0

Washington

0

0.0

0

0.0

1

<0.1

4

0.1

2

<0.1

0

0.0

1

<0.1

West Virginia

0

0.0

0

0.0

0

0.0

0

0.0

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

Wyoming

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

* 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

§ Not reportable

¶ 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: October 8, 2019