Airway microbiota across age and disease spectrum in cystic fibrosis

Edith T. Zemanick*, Brandie D. Wagner, Charles E. Robertson, Richard C. Ahrens, James F. Chmiel, John P. Clancy, Ronald L. Gibson, William T. Harris, Geoffrey Kurland, Theresa A. Laguna, Susanna A. McColley, Karen McCoy, George Retsch-Bogart, Kurtis T. Sobush, Pamela L. Zeitlin, Mark J. Stevens, Frank J. Accurso, Scott D. Sagel, J. Kirk Harris

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

159 Scopus citations


Our objectives were to characterise the microbiota in cystic fibrosis (CF) bronchoalveolar lavage fluid (BALF), and determine its relationship to inflammation and disease status. BALF from paediatric and adult CF patients and paediatric disease controls undergoing clinically indicated bronchoscopy was analysed for total bacterial load and for microbiota by 16S rDNA sequencing. We examined 191 BALF samples (146 CF and 45 disease controls) from 13 CF centres. In CF patients aged <2 years, nontraditional taxa (e.g. Streptococcus, Prevotella and Veillonella) constituted ∼50% of the microbiota, whereas in CF patients aged ?6 years, traditional CF taxa (e.g. Pseudomonas, Staphylococcus and Stenotrophomonas) predominated. Sequencing detected a dominant taxon not traditionally associated with CF (e.g. Streptococcus or Prevotella) in 20% of CF BALF and identified bacteria in 24% of culturenegative BALF. Microbial diversity and relative abundance of Streptococcus, Prevotella and Veillonella were inversely associated with airway inflammation. Microbiota communities were distinct in CF compared with disease controls, but did not differ based on pulmonary exacerbation status in CF. The CF microbiota detected in BALF differs with age. In CF patients aged <2 years, Streptococcus predominates, whereas classic CF pathogens predominate in most older children and adults.

Original languageEnglish (US)
Article number1700832
JournalEuropean Respiratory Journal
Issue number5
StatePublished - Nov 1 2017

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine


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