In five patient, however, only a non-bacterial pathogen was isolated from lung tisue, including Mucor species and Aspergillus fumigatus. All patients with non-bacterial pathogens isolated were immunosuppressed. Subsequent studies have also suggested that non-bacterial infectious causes for lung necrosis are more common in immunocompromised patients. Our patient was not known to be immunosuppressed. She had no immunosuppressing conditions or medication exposure.