“…We do not share the opinion of EBER et al [2] that ''true eradication'' of P. aeruginosa is not proven in our study. Knowing that throat/sputum cultures might be false-negative, we typed sequential P. aeruginosa isolates from CF patients and demonstrated that the majority of P. aeruginosa strains, isolated after eradication therapy and a period with negative throat/ sputum cultures, were indeed genotypically different from the initial strains.…”