Clinical Impact of β-Lactamase–producing Enterobacteriaceae in Sputum of Cystic Fibrosis Patients

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Abstract

This case series describes 18 cystic fibrosis (CF) patients of a 135-patient CF center cohort with extended spectrum β-lactamase–producing Enterobacteriaceae, from 2003 to 2012. Four had chronic infection. Prevalence increased annually from 0 to 6.35%. Risk factors compared with the 2010 CF center cohort included continuous inhaled antibiotics (P = 0.014) and courses of intravenous antibiotics during the year before first isolation (P = 0.009). Hospitalization rates were 1.05/year and 0.47/year preinfection and postinfection, respectively (P = 0.02). Slope of forced expiratory volume at 1 second% predicted remained unchanged during 12 months.

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