Reported Cases of Lyme Disease in Maryland,
By County and Year, 1990 - 1999

County

1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 Total

Allegany

1 1   1   0 1 2 0 0 6

Anne Arundel

27 22 8 10 24 23 20 50 60 115 359

Baltimore

39 49 35 57 92 74 95 13 77 59 590

Calvert

7 4 6 4 7 5 14 28 19 54 148

Caroline

3 22 16 8 11 4 2 18 17 26 127

Carroll

5 4 2 6 6 11 26 18 35 66 179

Cecil

15 30 11 18 34 31 14 12 16 32 213

Charles

23 10 11 10 13 9 17 25 44 63 225

Dorchester

1 5 4 4 3 3 1 3 4 3 31

Frederick

3 2   1 1 2 4 6 16 32 67

Garrett

      1   1 0 1 0 0 3

Harford

27 18 13 11 25 31 38 61 82 90 396

Howard

10 7 3 8 14 17 28 52 44 89 272

Kent

9 12 14 7 20 16 21 24 47 20 190

Montgomery

13 11 6 8 23 26 56 42 52 55 292

Prince George's

10 8 8 10 14 19 41 67 63 68 308

Queen Anne's

10 27 17 18 21 23 23 32 31 40 242

St. Mary's

5 14 6 2 6 8 6 2 9 30 88

Somerset

  2 4 1   2 1 2 7 7 26

Talbot

1 4 5 9 5 10 11 13 22 33 136

Washington

3     1   6 1 2 1 2 16

Wicomico

6 6 2 3 7 4 1 1 4 4 38

Worcester

8 15 4 3   1 1 15 5 7 59

Baltimore City

12 10 10 6 17 10 1 5 4 4 79

Total

238 283 185 207 343 336 423 494 659 899 4067