Influenza associated pulmonary aspergillosis in california: A case series

Invasive pulmonary aspergillosis has been reported to occur in patients who are critically ill with severe influenza. The mortality rate is high. We reviewed electronic medical records from University of California at Los Angeles Health Hospitals for patients who had a positive influenza and Aspergillus test from September 1st, 2019 to May 6th, 2020. We classified cases using definitions from the European Organization for Research and Treatment of Cancer/Mycoses Study Group (EORTC/MSG), Aspergillus Intensive Care Unit (AspICU), and Influenza Associated Pulmonary Aspergillosis (IAPA) definition. We identified 8 cases where the patient had both a positive influenza and Aspergillus test. Four (50%) of the 8 patients did not have underlying conditions that were considered typical risk factors for aspergillosis. Seven (87.5%) of the 8 patients were admitted to the intensive care unit and four (50%) of the 8 patients died. One patient met the diagnostic criteria by the EORTC/MSG guidelines, six by the AspICU, and seven by the IAPA definition. We found cases of influenza-associated pulmonary aspergillosis in a Los Angeles hospital population. Typical underlying conditions for aspergillosis were absent in four of the 8 cases. The ability to categorize the cases as influenza associated pulmonary aspergillosis varied. Further research and development of more sensitive guidelines to establish a diagnosis of invasive pulmonary aspergillosis in patients critically ill with influenza may be warranted.