In endemic areas, a high index of suspicion is warranted, especially with a known exposure to ticks. The diagnosis can be confirmed by using PCR. A peripheral blood smear can also be examined for intracytoplasmic inclusions called morulae.
Ehrlichiosis ewingii infection
Legionnaires' disease
Arcanobacterium haemolyticum infection
Miliary tuberculosis
Cutaneous manifestations of COVID-19
Lemierre's syndrome
DAVID syndrome
Systemic inflammatory response syndrome