Adaptive resistance to benzalkonium chloride, aldara amikacin and tobramycin. amoxicillin antibiotic during pregnancy PATIENTS AND METHODS. Pseudomonas aeruginosa NCIMB 10421 adapted to grow in high concentrations of benzalkonium chloride (BC) had lower MIC to antibiotics than the wild type, whereas Ps. SIGNIFICANCE AND IMPACT aldara OF THE ST