No rapid laboratory tests are available to diagnose rickettsial diseases early in the course of illness, and serologic assays usually take 10–12 days to become positive. Research is indicating that swabs of eschars may be used for molecular detection of rickettsial infections.
Rickettsiosis
Leptospirosis
Murine typhus
Bartonellosis
Typhoid fever
Scrub typhus
Scarlet fever
Lyme disease