en Original Article Combined Disk Test, Double Disk Synergy Test, Extended- Spectrum Beta- Lactamase, PER-1gene, Pseudomonas aeruginosa 678 682 https://ijbms.mums.ac.ir/article_4837.html Mohammad Taghi Akhi akhim@tbzmed.ac.ir 18824 Yes Department of Microbiology, Faculty of Medicine, and *Research Center of Infectious Diseases and Tropical Medicine, Tabriz University of Medical Sciences, Tabriz, Iran Yones Khalili 18825 No Department of Microbiology, Faculty of Medicine, and *Research Center of Infectious Diseases and Tropical Medicine, Tabriz University of Medical Sciences, Tabriz, Iran Reza Ghottaslou 18826 No Department of Microbiology, Faculty of Medicine, and *Research Center of Infectious Diseases and Tropical Medicine, Tabriz University of Medical Sciences, Tabriz, Iran Mohammad Aghazadeh aghazadem59@yahoo.com 18827 No Department of Microbiology, Faculty of Medicine, and *Research Center of Infectious Diseases and Tropical Medicine, Tabriz University of Medical Sciences, Tabriz, Iran Mohammad hosein Seroush Bar Haghi 18828 No Department of Microbiology, Faculty of Medicine, and *Research Center of Infectious Diseases and Tropical Medicine, Tabriz University of Medical Sciences, Tabriz, Iran Saber Yousefi dr.rasoul_mohammadi@yahoo.com 18829 No Department of Clinical Laboratory Sciences, Faculty of Paramedicine, Urmia University of Medical Science