Nocardia otitidiscaviarum is an infrequent cause of nocardial pneumonia and rarely affects non-immunocompromised individuals. Pneumonia may not resolve if the causative organism is not susceptible to the empirically given antimicrobial drug. Amoxicillin–clavulanic acid is a commonly used initial empiric antibiotic for suspected community-acquired bacterial pneumonia on outpatient basis. We report an unusual case of N. otitidiscaviarum as a possible etiologic agent of non-resolving pneumonia due to amoxicillin-clavulanic acid resistance in a previously healthy adult male.
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