Variable and Possible Etiology-fever and rash

Summer/fall > other seasons Enterovirus Winter Parvovirus, Meningococcemia Spring/summer Lyme, RMSF, Ehrlichiosis, Anaplasmosis Year-round Adenovirus, Mycoplasma Cat and dog exposure Bartonella, Pasteurella, Toxoplasma, Capnocytophaga Tick exposure Lyme, RMSF, Ehrlichiosis, Anaplasmosis Adult <30 y Mononucleosis (EBV or CMV) Inadequate immunization Measles, Rubella, VZV, influenza Sexually active HIV, syphilis, disseminated gonococcal infection, HSV

Consider noninfectious causes: allergy/DRESS, DVT, phlebitis, vasculitides, neutrophilic dermatoses, gout, connective tissues dis., malignancy, foreign body rxn