Mycobacterium chimaera Infection After Cardiac Surgery: First Canadian Outbreak.

Recently reported in Europe and United States, disseminated Mycobacterium chimaera infection is a novel clinical entity linked to point contamination of Stockert 3T heater-cooler units used for cardiopulmonary bypass. We present here the first two cases in Canada. Both patients presented with nonspecific extracardiac symptoms 1 year after undergoing minimally invasive mitral surgical repair. Before the right diagnosis was established, the patients were initially treated with prednisone for suspected sarcoidosis. One patient is currently improving, and the other needed mitral valve repair despite aggressive treatment. Because of the nonspecific mode and timing of presentation, a high index of suspicion is necessary for the diagnosis of M. chimaera infection.