RT Journal Article SR Electronic T1 Chronic obstructive pulmonary disease exacerbations: Impact of the GOLD stage or the presence of bronchiectasis on sputum microbiology JF European Respiratory Journal JO Eur Respir J FD European Respiratory Society SP P4405 VO 42 IS Suppl 57 A1 Isabelle Rault A1 CĂ©line Lecerf A1 Charlotte Trouve A1 Vincent Jounieaux A1 Claire Andrejak YR 2013 UL http://erj.ersjournals.com/content/42/Suppl_57/P4405.abstract AB Background: Patients with chronic obstructive pulmonary disease (COPD) have often infectious exacerbations. Microbiology seems to differ from one exacerbation to an other. Does the GOLD stage or the presence of bronchiectasis have an impact on microbiology?Methods: We conducted this retrospective study on a cohort of COPD patients with at least two exacerbations with positive microbiology to compare the sputum microbiology and its evolution according to the GOLD stage and/or the presence of bronchiectasis.Results: Sixty COPD patients were included. Among them, 32 had a COPD stage IV, and 17 had bronchiectasis. In the whole cohort, microbiology differed from one exacerbation to an other with same proportions of Pseudomonas aeruginosa and community pathogens for each exacerbations, but in different patients. In the GOLD Stage IV patients, we found similar results with different microbiologies from one exacerbation to an other. For patients with associated bronchiectasis, recurrence of Pseudomonas aeruginosa were often found from one exacerbation to another one.Conclusion: Excepted for patients with bronchiectasis, microbiology of infectious exacerbation of COPD patients, even for GOLD stage IV patients, differed from one episode to an other.