Table 1 2008 CDC Lyme Disease Surveillance Case Definition [9]

Confirmed

a. a case of EM with a known exposure *

b. a case of EM with laboratory evidence of infection and without a known exposure

c. a case with at least one late manifestation that has laboratory evidence of infection

Probable

Any other case of physician-diagnosed Lyme disease that has laboratory evidence of infection

Suspected

a. a case of EM where there is no known exposure and no laboratory evidence of infection

b. a case with laboratory evidence of infection but no clinical information available (e.g. a laboratory report)