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Volume 18, Number 2—February 2012

Research

Effect of Surveillance Method on Reported Characteristics of Lyme Disease, Connecticut, 1996–2007

Starr-Hope ErtelComments to Author , Randall S. Nelson, and Matthew L. Cartter
Author affiliations: Connecticut Department of Public Health, Hartford, Connecticut, USA

Main Article

Table 5

Lyme disease cases, by clinical manifestation, season, and surveillance method, Connecticut, 1996–2007

Clinical manifestation/season No. (%) cases
PS, n = 10,535* AS, n = 8,281* ELS, n = 1,767* MLS, n = 8,685* Total, n = 29,268
All
  Winter 278 (2.6) 244 (2.9) 76 (4.3) 548 (6.3) 1,146 (3.9)
  Spring 1,029 (9.8) 923 (11.1) 154 (8.7) 1,118 (12.9) 3,224 (11.0)
  Summer 8,121 (77.1) 6,234 (75.3) 1,276 (72.2) 5,707 (65.7) 21,338 (72.9)
  Fall 1,107 (10.5) 880 (10.6) 261 (14.8) 1,312 (15.1) 3,560 (12.2)
Erythema migrans
  Winter 84 (0.8) 56 (0.7) 7 (0.4) 73 (0.8) 220 (0.8)
  Spring 741 (7.0) 624 (7.5) 34 (1.9) 425 (4.9) 1,824 (6.2)
  Summer 7,315 (69.4) 5,500 (66.4) 993 (56.2) 4,164 (47.9) 17,972 (61.4)
  Fall 739 (7.0) 515 (6.2) 78 (4.4) 501 (5.8) 1,833 (6.3)
  Total 8,879 (84.3) 6,695 (80.8) 1,112 (62.9) 5,163 (59.4) 21,849 (74.7)
Late manifestations
  Winter 194 (11.7) 188 (11.9) 69 (10.5) 475 (13.5) 926 (3.2)
  Spring 288 (17.4) 299 (18.8) 120 (18.3) 693 (19.7) 1,400 (4.8)
  Summer 806 (48.7) 734 (46.3) 283 (43.2) 1,543 (43.8) 3,366 (11.5)
  Fall 368 (22.2) 365 (23.0) 183 (27.9) 811 (23.0) 1,727 (5.9)
  Total 1,656 (15.7) 1,586 (19.2) 655 (37.1) 3,522 (40.6) 7,419 (25.3)

*PS, passive surveillance; AS, active surveillance; ELS, enhanced laboratory surveillance; MLS, mandatory laboratory surveillance.

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