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Table 1 Distribution of canine samples by state and Ehrlichia spp. seroprevalence relative to reported cases of HME.

From: Seroprevalence of Ehrlichia canis, Ehrlichia chaffeensis and Ehrlichia ewingii in dogs in North America

State

Total Number Samples

Total Ehrlichia(%)

E. canis

(%)

E. ewingii(%)

E. chaffeensis(%)

HME cases/M*

Alaska

2

0

0

0

0

N

Alabama

337

15 (4.5)

1 (0.3)

12 (3.6)

5 (1.5)

1.8

Arkansas

84

37 (44.0)

3 (3.6)

31 (36.9)

18 (21.4)

21.7

Arizona

1

0

0

0

0

0

California

5

0

0

0

0

0.04

Colorado

5

0

0

0

0

N

Connecticut

97

0

0

0

0

0.3

Delaware

27

0

0

0

0

23.3

Florida

733

27 (3.7)

4 (0.5)

19 (2.6)

9 (1.2)

0.6

Georgia

662

51 (7.7)

1 (0.2)

36 (5.4)

23 (3.5)

1.9

Hawaii

2

0

0

0

0

N

Iowa

14

0

0

0

0

N

Illinois

489

17 (3.5)

0

8 (1.6)

9 (1.8)

2.4

Indiana

553

4 (0.7)

0

4 (0.7)

3 (0.5)

0.3

Kansas

457

35 (7.7)

4 (0.9)

31 (6.8)

5 (1.1)

1.1

Kentucky

16

3 (18.8)

1 (6.3)

3 (18.8)

0

2.9

Louisiana

274

6 (2.2)

4 (1.5)

2 (0.7)

0

0

Massachusetts

241

2 (0.8)

0

2 (0.8)

2 (0.8)

2.3

Maryland

254

16 (6.3)

2 (0.8)

9 (3.5)

9 (3.5)

8.3

Maine

13

0

0

0

0

0.8

Michigan

9

0

0

0

0

0.5

Minnesota

7

0

0

0

0

2.1

Missouri

663

190 (29)

5 (0.8)

151 (22.8)

85 (12.8)

28.4

Mississippi

151

9 (6.0)

0

9 (6.0)

2 (1.3)

1.0

Montana

1

0

0

0

0

N

North Carolina

403

41 (10.2)

3 (0.7)

21 (5.2)

23 (5.7)

4.7

Nebraska

62

1

1 (1.6)

0

0

1.4

New Hampshire

28

0

0

0

0

4.2

New Jersey

257

10 (3.9)

1 (0.4)

7 (2.7)

5 (1.9)

9.0

New York

188

3 (1.6)

0

3 (1.6)

1 (0.5)

3.7

Ohio

428

5 (1.2)

4 (0.9)

1 (0.2)

0

1.0

Oklahoma

514

47 (9.1)

9 (1.8)

37 (7.2)

5 (1.0)

33.2

Pennsylvania

96

1 (1.0)

0

1 (1.0)

0

0.7

Rhode Island

24

0

0

0

0

9.0

South Carolina

34

7 (20.6)

3 (8.8)

2 (5.9)

3 (8.8)

0.3

South Dakota

2

0

0

0

0

0

Tennessee

181

18 (9.9)

5 (2.8)

14 (7.7)

5 (2.8)

10.9

Texas

893

23 (2.6)

18 (2.0)

5 (0.6)

1 (0.1)

0.7

Virginia

385

48 (12.5)

2 (0.5)

31 (8.1)

25 (6.5)

8.4

Wisconsin

9

0

0

0

0

4.0

West Virginia

30

1

0

0

1 (3.3)

0.3

Unknown

31

1

0

0

1

 

Total

8662

618 (7.1)

71 (0.8)

439 (5.1)

240 (2.8)

 
  1. *Average incidence of HME cases per million as reported for 2008 and 2009 by passive surveillance; MMWR June 25, 2010 (2008) and May 13, 2011 (2009) (N - not reported)