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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)