Garbacz K, et al. - This study was designed to determine the relatedness of molecular types of Staphylococcus aureus isolates colonizing cystic fibrosis (CF) patients with their antimicrobial resistance and prevalence of toxin genes. Findings suggested that individuals with CF could also be colonized with animal-related ST398 methicillin-resistant S. aureus (MRSA), and justified constant monitoring of staphylococcal colonization and identification of epidemic S. aureus clones in this group.