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Background: WC and NS contributed equally.

Non-tuberculous mycobacteria (NTM) frequently colonise patients with end stage cystic fibrosis (CF), but its impact on the course of the disease following lung transplantation is unknown.

Methods: Lung transplant recipients with CF who underwent lung transplantation at our institution between January 1990 and May 2003 (n = 146) and CF patients awaiting lung transplantation in May 2003 (n = 31) were studied retrospectively.

Results: The prevalence rate of NTM isolated from respiratory cultures in patients with end stage CF referred for lung transplantation was 19.7%, compared with a prevalence rate of 13.7% for NTM isolates in CF lung transplant recipients. The overall prevalence of invasive NTM disease after lung transplantation was low (3.4%) and was predicted most strongly by pre-transplant NTM isolation (p = 0.001, Fisher’s exact test, odds ratio (OR) 6 …