Comparison between the antimicrobial activity of colistin and ceftazidime-avibactam against multidrug-resistant Pseudomonas aeruginosa isolated from patients with ventilator-associated pneumonia in intensive care units of Kasr Al-Ainy hospitals. - Sahloul NY; Helmy SS; Awad AR; Elsayed AI; Sahbal MA; Aboutaleb AMI (BMC infectious diseases, 2026)