Ehrlichia ewingii ehrlichiosis was first recognized in human disease in 1999, almost exclusively in immunocompromised patients - HIV, transplant, or chemotherapy. Many cases test negative on standard E. chaffeensis antibody panels and are diagnosed only by PCR. Doxycycline still works.
Ehrlichia chaffeensis ehrlichiosis classically presents with fever, headache, and a triad of laboratory findings: leukopenia,…
When a clinician suspects ehrlichiosis or anaplasmosis but the antibody titers are too cross-reactive to call, PCR on whole blood drawn…
Ehrlichia chaffeensis and Anaplasma phagocytophilum cause clinically similar diseases but parasitize different white blood cells.…
CDC's surveillance category undetermined ehrlichiosis or anaplasmosis exists because the two diseases share clinical presentation,…
A single tick species, Amblyomma americanum, transmits ehrlichiosis from Ehrlichia chaffeensis and E. ewingii, tularemia, Heartland virus,…
A 2001 NEJM trial by Robert Nadelman and colleagues showed that a single 200 mg oral dose of doxycycline within 72 hours of removing an…