Phenotypic variability of Pseudomonas aeruginosa in sputa from patients with acute infective exacerbation of cystic fibrosis and its impact on the validity of antimicrobial susceptibility testing.

Abstract excerpt

OBJECTIVES: To investigate the variability in antimicrobial susceptibility of Pseudomonas aeruginosa from sputa of patients with cystic fibrosis, to compare testing individual colonies of the same morphotype either separately or combined and to study the reproducibility of testing antimicrobial susceptibility within and between laboratories. METHODS: One hundred and one sputa were cultured. Four colonies of each...

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