“…While no randomized, well-controlled trials have assessed the safety and efficacy of this combination, observational studies suggest that it is clinically useful in treating serious infections caused by MBL-organisms. 1 We deeply studied and discussed the very informative and clinically useful research entitled “Synergistic Effect of Ceftazidime-Avibactam with Aztreonam on Carbapenemase-Positive Klebsiella pneumoniae MBL+, NDM+” conducted by Mateusz Szymański et al 2 We acknowledge that the research and findings of the author are highly valuable and clinically beneficial.…”