A Unique Cohort of Co-Infection-Free Difficult to Treat Pseudomonas aeruginosa Pneumonia: Mortality comparison of Aminoglycoside/ Fluoroquinolone/ Colistin Combination Based Regimen versus Ceftazidime/Avibactam or Ceftolozane/ Tazobactam.

Zavicefta (ceftazidime/avibactam) - Pfizer, AbbVie

Zerbaxa (ceftolozane /tazobactam) - Merck (MSD)

colistin sulphate - Generic mfg.

Hajar AlQahtani, PharmD; Hessah Y. bin hithlayn, PharmD; Atheer Y. AlMutairi, PharmD

Sep 6, 2026