[The analysis of the isolated microorganisms from the respiratory tract of cystic fibrosis patients treated in Children's Memorial Health Institute 1999-2002].

The aim of the study was, to analyze the microorganisms cultured from materials from the airways of children with cystic fibrosis treated in the Children's Memorial Health Institute in Warsaw during 1999-2002. A total of 411 samples were tested, obtained from the airways of 58 patients with diagnosed mucoviscidosis. The age of the treated patients was within the range of 1 month and 20 years. The bacteriological tests were taken during routine visits in the Consultation and Pulmonology Clinic, which took place 3-4 times a year. The most often isolated strain was Staphylococcus aureus--48%. 17% of the isolates of Haemophilus influenzae and 13% of Pseudomonas aeruginosa were obtained. Most S. aureus, P. aeruginosa and H. infiuenzae isolates showed high susceptibility to tested antimicrobial agents. About 6% of all S. aureus isolates were resistant to methicillin (MRSA). S. aureus was occurring in all age groups with the same frequency. The rods H. influenzae were cultured more often from children under 10 years, while P. aeruginosa more often from older patients.