Distribution of antibiotic resistance rates and profiles. S. maltophilia strains were evaluated for in vitro susceptibility to six antibiotics: SXT, cotrimoxazole; CHL, chloramphenicol; LVX, levofloxacin; CPX, ciprofloxacin; TZP, piperacillin/tazobactam; MER, meropenem. The frequencies of (A) antibiotic resistances, and (B) multiresistance profiles (non-MDR, MDR, XDR, and PDR) were calculated for cystic fibrosis (CF) (n = 40), non-CF (n = 45), and overall (n = 85) strains. (C) Resistance rates were calculated according to the capability to form biofilm: Non-producers (NP; n = 10) or biofilm-producers (n = 75; gathering strong, moderate, and weak-producers). Significance level at Fisher’s exact test: * p < 0.05; *** p < 0.001. Resistance profiles according to Magiorakos et al. [24]: MDR, multidrug-resistant strains; XDR, extensively drug-resistant strains; PDR, pandrug-resistant strains.