Antimicrobial activity evaluation and comparison of methods of susceptibility for Klebsiella pneumoniae carbapenemase (KPC)-producing Enterobacter spp. isolates

作者：Rechenchoski Daniele Zendrini^*; Lopes Dambrozio Angelica Marim; Polano Vivan Ana Carolina; Schuroff Paulo Alfonso; Burgos Tatiane Das Neves; Pelisson Marsileni; Eches Perugini Marcia Regina; Vespero Eliana Carolina

来源：Brazilian Journal of Microbiology, 2017, 48(3): 509-514.

DOI：10.1016/j.bjm.2017.01.008

• Antimicrobial activity
• Enterobacter spp.
• KPC
• Methods of susceptibilitya

The production of KPC (Klebsiella pneumoniae carbapenemase) is the major mechanism of resistance to carbapenem agents in enterobacterias. In this context, forty KPC-producing Enterobacter spp. clinical isolates were studied. It was evaluated the activity of antimicrobial agents: polymyxin B, tigecycline, ertapenem, imipenem and meropenem, and was performed a comparison of the methodologies used to determine the susceptibility: broth microdilution, Etest (R) (bioMerieux), Vitek 2 (R) automated system (bioMerieux) and disc diffusion. It was calculated the minimum inhibitory concentration (MIC) for each antimicrobial and polymyxin B showed the lowest concentrations for broth microdilution. Errors also were calculated among the techniques, tigecycline and ertapenem were the antibiotics with the largest and the lower number of discrepancies, respectively. Moreover, Vitek 2 (R) automated system was the method most similar compared to the broth microdilution. Therefore, is important to evaluate the performance of new methods in comparison to the reference method, broth microdilution.

• 出版日期2017-9