Increased prevalence of Pneumocystis jirovecii colonisation in acute pulmonary exacerbations of cystic fibrosis

Heather D. Green*, Rowland J. Bright-Thomas, Ken J. Mutton, Malcolm Guiver, Andrew M. Jones

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Objectives: This study examined the prevalence of Pneumocystis jirovecii in the sputum of adults with cystic fibrosis during clinical stability and acute pulmonary exacerbation. Methods: This was a prospective, longitudinal observational study of patients attending the Manchester Adult Cystic Fibrosis Centre. Sputum samples were analysed for P. jirovecii DNA using PCR at enrolment and up to 5 follow-up visits. Patients were classified as stable or exacerbating using a modified Fuch's pulmonary exacerbation score. Results: 226 samples were tested from 111 patients. P. jirovecii was more likely to be detected in samples at acute pulmonary exacerbation (7/76 (9.2%)) compared with stable visits (3/150 (2%)), p = 0.03. P. jirovecii was detected less frequently if patients had received co-trimoxazole within 3 months of sample collection (0% versus 29.7%, p = 0.03). Conclusions: Prevalence of P. jirovecii in stable patients is low, but P. jirovecii is detected in approximately 1 in 10 patients experiencing an acute pulmonary exacerbation.

Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalJournal of Infection
Issue number1
Publication statusPublished - 1 Jul 2016

Bibliographical note

Funding Information:
This report is independent research supported by the National Institute for Health Research Clinical Research Facility at University Hospital of South Manchester NHS Foundation Trust . The views expressed in this publication are those of the author(s) and not necessarily those of the NHS, the National Institute for Health Research or the Department of Health. The authors would like to acknowledge the Manchester Allergy, Respiratory and Thoracic Surgery Biobank and the North West Lung Centre Charity for supporting this project. In addition we would to thank the study participants for their contribution.

Publisher Copyright:
© 2016 The British Infection Association.


  • Cystic fibrosis
  • Pneumocystis jirovecii
  • Pulmonary exacerbation


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