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Volume 31, Number 7—July 2025

Dispatch

Lyme Disease Testing Practices, Wisconsin, USA, 2016–2019

Kiersten J. KugelerComments to Author , Erica Scotty, Austin Earley, Alison F. Hinckley, Sarah A. Hook, Courtney C. Nawrocki, Alexandra M. Linz, Jennifer Meece, and Anna M. Schotthoefer
Author affiliation: Centers for Disease Control and Prevention, Fort Collins, Colorado, USA (K.J. Kugeler, A. Earley, A.F. Hinckley, S.A. Hook, C.C. Nawrocki); Marshfield Clinic Research Institute, Marshfield Clinic Health System, Marshfield, Wisconsin, USA (E. Scotty, A.M. Linz, J. Meece, A.M. Schotthoefer)

Main Article

Table 1

Patient characteristics and positivity rates of Lyme disease serologic testing, USA, 2016–2019*

Characteristic No. (%) test episodes % Positive (95% CI)
Patient sex†
F 21,656 (51.5) 5.8 (5.5–6.1)
M
 20,420 (48.5)
 8.1 (7.7–8.5)
Patient race/ethnicity
American Indian/Alaska Native 303 (0.7) 6.9 (4.6–10.4)
Asian 302 (0.7) 8.6 (6.0–12.3)
Black or African American 130 (0.3) 5.4 (2.6–10.7)
Native Hawaiian/other Pacific Islander 28 (0.1) 7.1 (2.0–22.7)
White 37,457 (86.6) 7.1 (6.8–7.3)
>1 race 199 (0.5) 5.5 (3.1–9.6)
Hispanic 623 (1.5) 5.6 (4.1–7.7)
Unknown or not reported
 4,035 (9.6)
 5.9 (5.2–6.6)
Testing month
January 1,835 (4.4) 4.6 (3.8–5.7)
February 1,563 (3.7) 4.0 (3.1–5.1)
March 1,746 (4.2) 4.8 (3.9–5.9)
April 2,243 (5.3) 5.1 (4.3–6.1)
May 4,215 (10.0) 5.0 (4.3–5.7)
June 6,229 (14.8) 6.7 (6.1–7.3)
July 6,399 (15.2) 9.6 (8.9–10.4)
August 5,306 (12.6) 9.4 (8.6–10.2)
September 3,696 (8.8) 7.3 (6.5–8.2)
October 3,648 (8.7) 7.2 (6.4–8.1)
November 3,022 (7.2) 5.8 (5.0–6.7)
December 2,175 (5.2) 5.4 (4.5–6.4)

*Results reflect 42,077 test episodes. †One patient missing data on sex.

Main Article

Page created: May 09, 2025
Page updated: June 25, 2025
Page reviewed: June 25, 2025
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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