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  • Title: Risk factors for nontuberculous mycobacterial infections in solid organ transplant recipients: a case-control study.
    Author: Longworth SA, Vinnard C, Lee I, Sims KD, Barton TD, Blumberg EA.
    Journal: Transpl Infect Dis; 2014 Feb; 16(1):76-83. PubMed ID: 24350627.
    Abstract:
    BACKGROUND: The epidemiology of nontuberculous mycobacteria (NTM) disease in solid organ transplant recipients is poorly defined. METHODS: We identified all solid organ transplant recipients with NTM disease at a single center over a 7.5-year period, and collected data on patient demographics, co-morbidities, immunosuppressive medications, and rejection. We conducted a case-control study to identify risk factors for disease, matching 3 control patients to each case patient by date of transplantation. RESULTS: A total of 34 cases of NTM disease occurred during the study period, involving 6 single lung, 13 bilateral lung, 8 heart, 4 liver, 2 kidney, and 1 pancreas-kidney recipients. Cases were predominantly male (24/34), with a median age of 55 years (interquartile range [IQR]: 46-61 years), and developed after a median of 8 months post transplantation (IQR: 2-87 months). Mycobacterium abscessus and Mycobacterium avium complex were the most common pathogens, and the lung (including pleura) was the most common site of disease. In the adjusted case-control analysis, lung transplant recipients had the highest risk of NTM disease. CONCLUSIONS: Additional studies are needed to evaluate the role of targeted surveillance measures for NTM disease in high-risk patients, particularly lung transplant recipients, and to characterize the mechanisms of disease acquisition.
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