Abstract
Strains of Aspergillus fumigatus (n = 24) were isolated from the sputa of six patients with cystic fibrosis during periods from 3 to 11 months. The genetic polymorphisms of the strains were studied using the random amplified polymorphic DNA (RAPD) assay with three single oligonucleotides and pairwise combined primers. The analysis of RAPD patterns resulted in 15 different RAPD types. In four patients, the colonizing type changed, whereas in two others the same types were detected over periods between 3 and 11 months. The genetic diversity as well as the shift of the colonizing strains found in some patients might be important for the epidemiology of Aspergillus infections in patients with cystic fibrosis.
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