期刊
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
卷 65, 期 6, 页码 -出版社
AMER SOC MICROBIOLOGY
DOI: 10.1128/AAC.02271-20
关键词
beta-lactams; animal models; metallo-beta-lactamase
Metallo-beta-lactamases (MBLs) lead to resistance to almost all beta-lactam antimicrobial agents, with varying zinc concentrations in testing media possibly mediating discrepancies in MBL resistance. Treatment outcomes are influenced by comorbidities and combination therapy.
Metallo-beta-lactamases (MBLs) result in resistance to nearly all beta-lactam antimicrobial agents, as determined by currently employed susceptibility testing methods. However, recently reported data demonstrate that variable and supraphysiologic zinc concentrations in conventional susceptibility testing media compared with physiologic (bioactive) zinc concentrations may be mediating discordant in vitro-in vivo MBL resistance. While treatment outcomes in patients appear suggestive of this discordance, these limited data are confounded by comorbidities and combination therapy. To that end, the goal of this review is to evaluate the extent of beta-lactam activity against MBL-harboring Enterobacterales in published animal infection model studies and provide contemporary considerations to facilitate the optimization of current antimicrobials and development of novel therapeutics.
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