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Reported Lyme disease cases by state, 1999-2008

State 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
  Confirmed  Probable† Incidence*
Alabama 20 6 10 11 8 6 3 11 13 6 3 0.1
Alaska 0 2 2 3 3 3 4 3 10 6 0 0.9
Arizona 3 2 3 4 4 13 10 10 2 2 6 0.0
Arkansas 7 7 4 3 0 0 0 0 1 0 0 0.0
California 139 96 95 97 86 48 95 85 75 74 0 0.2
Colorado 3 0 0 1 0 0 0 0 0 2 1 0.0
Connecticut 3215 3773 3597 4631 1403 1348 1810 1788 3058 2738 1158 78.2
Delaware 167 167 152 194 212 339 646 482 715 772 0 88.4
DC 6 11 17 25 14 16 10 62 116 71 3 12.0
Florida 59 54 43 79 43 46 47 34 30 72 16 0.4
Georgia 0 0 0 2 10 12 6 8 11 35 0 0.4
Hawaii 0 0 0 0 0 0 0 0 0 0 0 0.0
Idaho 3 4 5 4 3 6 2 7 9 5 4 0.3
Illinois 17 35 32 47 71 87 127 110 149 108 0 0.8
Indiana 21 23 26 21 25 32 33 26 55 42 0 0.7
Iowa 24 34 36 42 58 49 89 97 123 85 24 2.8
Kansas 16 17 2 7 4 3 3 4 8 16 0 0.6
Kentucky 19 13 23 25 17 15 5 7 6 5 0 0.1
Louisiana 9 8 8 5 7 2 3 1 2 3 0 0.1
Maine 41 71 108 219 175 225 247 338 529 780 128 59.2
Maryland 899 688 608 738 691 891 1235 1248 2576 1746 472 31.0
Massachusetts 787 1158 1164 1807 1532 1532 2336 1432 2988 3960 622 60.9
Michigan 11 23 21 26 12 27 62 55 51 76 16 0.8
Minnesota 283 465 461 867 474 1023 917 914 1238 1046 236 20.0
Mississippi 4 3 8 12 21 0 0 3 1 1 0 0.0
Missouri 72 47 37 41 70 25 15 5 10 6 0 0.1
Montana 0 0 0 0 0 0 0 1 4 6 11 0.6
Nebraska 11 5 4 6 2 2 2 11 7 8 4 0.4
Nevada 2 4 4 2 3 1 3 4 15 9 3 0.3
New Hampshire 27 84 129 261 190 226 265 617 896 1211 390 92.0
New Jersey 1719 2459 2020 2349 2887 2698 3363 2432 3134 3214 271 37.0
New Mexico 1 0 1 1 1 1 3 3 5 4 4 0.2
New York 4402 4329 4083 5535 5399 5100 5565 4460 4165 5741 2053 29.5
North Carolina 74 47 41 137 156 122 49 31 53 16 31 0.2
North Dakota 1 2 0 1 0 0 3 7 12 8 2 1.2
Ohio 47 61 44 82 66 50 58 43 33 40 5 0.3
Oklahoma 8 1 0 0 0 3 0 0 1 1 1 0.0
Oregon 15 13 15 12 16 11 3 7 6 18 20 0.5
Pennsylvania 2781 2343 2806 3989 5730 3985 4287 3242 3994 3818 0 30.7
Rhode Island 546 675 510 852 736 249 39 308 177 186 24 17.7
South Carolina 6 25 6 26 18 22 15 20 31 14 15 0.3
South Dakota 0 0 0 2 1 1 2 1 0 3 0 0.4
Tennessee 59 28 31 28 20 20 8 15 31 7 24 0.1
Texas 72 77 75 139 85 98 69 29 87 105 48 0.4
Utah 2 3 1 5 2 1 2 5 7 3 2 0.1
Vermont 26 40 18 37 43 50 54 105 138 330 74 53.1
Virginia 122 149 156 259 195 216 274 357 959 886 47 11.4
Washington 14 9 9 11 7 14 13 8 12 22 1 0.3
West Virginia 20 35 16 26 31 38 61 28 84 120 15 6.6
Wisconsin 490 631 597 1090 740 1144 1459 1466 1814 1493 541 26.5
Wyoming 3 3 1 2 2 4 3 1 3 1 2 0.2
U.S. TOTAL 16,273 17,730 17,029 23,763 21,273 19,804 23,305 19,931 27,444 28,921 6,277 9.4
†2008 revision of the National Surveillance Case Definition allows for reporting of probable cases
* confirmed cases per 100,000 population


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Page last reviewed August 26, 2009

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