Abstract
Pseudomonas aeruginosa is one of the most clinically important Gram-negative bacteria and is related to many severe and life-threatening infections worldwide. It presents intrinsic resistance against many antibiotics and has the ability to acquire or develop additional mechanisms to overcome the action of all anti-pseudomonal drugs. Formerly abandoned antibiotics and new compounds such as cefiderocol and combinations of β-lactams with new β-lactamase inhibitors are considered for the treatment of infections due to multi- or extensively-drug-resistant strains. In the present review, the antimicrobial resistance mechanisms of P. aeruginosa and the potential treatment options for the difficult to treat P. aeruginosa infections are discussed in an attempt to correlate microbiological and laboratory data to the choice of optimal treatment in everyday clinical practice.