In vitro activity of ceftazidime–avibactam, ceftolozane–tazobactam, and other comparable agents against clinically important Gram-negative bacilli: results from the 2017 Surveillance of Multicenter Antimicrobial Resistance in Taiwan (SMART) Shio-Shin Jean,1,2 Min-Chi Lu,3 Zhi-Yuan Shi,4 Shu-Hui Tseng,5 Ting-Shu Wu,6 Po-Liang Lu,7 Pei-Lan Shao,8 Wen-Chien Ko,9 Fu-Der Wang,10,11 Po-Ren Hsueh12,13 1Department of Emergency Medicine and Emergency and Critical Care Medicine, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan; 2Department of Emergency, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan; 3Department of Microbiology and Immunology, School of Medicine, China Medical University, Taichung, Taiwan; 4Department of Internal Medicine, Taichung Veterans General Hospital, Taichung, Taiwan; 5Center for Disease Control and Prevention, Ministry of Health and Welfare, Taiwan; 6Division of Infectious Diseases, Department of Internal Medicine, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan; 7Department of Internal Medicine, Kaohsiung Medical University Hospital, College of Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan; 8Department of Pediatrics, Hsin-Chu Branch, National Taiwan University Hospital, Hsin-Chu, Taiwan; 9Department of Internal Medicine, National Cheng Kung University Medical College and Hospital, Tainan, Taiwan; 10Division of Infectious Diseases, Department of Medicine, Taipei Veterans General Hospital, Taipei, Taiwan; 11School of Medicine, National Yang-Ming University, Taipei, Taiwan; 12Department of Laboratory Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan; 13Department of Internal Medicine, National Taiwan University Hospital, National Taiwan University College of Medicine, Taipei, Taiwan Objectives: We investigated the in vitro antimicrobial susceptibilities of clinically important Gram-negative bacteria (GNB) from 16 major teaching hospitals in Taiwan in 2017. Materials and methods: Escherichia coli (n