Stenotrophomonas Maltophilia Cavitary Pneumonia in an Immunocompetent Patient: A Case Report

Stenotrophomonas maltophilia (S. maltophilia) is a gram-negative pathogen, known to cause nosocomial infection in immunocompromised patients in intensive care units. Use of central venous catheters, history of prior hospitalization, chronic obstructive lung disease and use of broadspectrum antibiotics especially carbapenems are known risk factors for development of ventilator associated pneumonia (VAP) due to S. maltophilia. We present an interesting case of S. maltophilia causing cavitary pneumonia in an immunocompetent patient, while on treatment with broad spectrum antibiotic therapy, with no prior history of hospitalization.