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Year : 2021  |  Volume : 23  |  Issue : 2  |  Page : 63-68

Detection of Metallo-β-lactamase production amongst Acinetobacter species from a tertiary care hospital

Department of Microbiology, Bharati Vidyapeeth Deemed to be University Medical College, Pune, Maharashtra, India

Correspondence Address:
Dr. Vrushali Harsh Thakar
Department of Microbiology, Bharati Vidyapeeth Deemed to be University Medical College, Dhankawadi, Pune - 411 043, Maharashtra
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/jacm.jacm_64_21

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INTRODUCTION: In the past few years, resistance to antimicrobial drugs has been increasing in Acinetobacter spp., which will likely become a substantial treatment challenge in the future. Carbapenems have potent activity against Acinetobacter spp. and are usually the drugs of choice against multidrug-resistant Acinetobacter baumannii. Acinetobacter spp. may develop resistance to carbapenems by producing Metallo-β-lactamases (MBLs). The emergence of MBL-encoding genes is worrisome, since they are usually carried by mobile genetic structures with great ability to spread. AIMS AND OBJECTIVES: The aim of this study was undertaken to find out the prevalence of MBL producing Acinetobacter species from a tertiary care hospital. MATERIALS AND METHODS: Acinetobacter species were identified by conventional methods and antimicrobial susceptibility tests were done by the Kirby Bauer's technique. The presence of MBL was detected by the combination disc method and by VITEK 2. Verona integrin-encoded MBL (VIM) gene was detected in 15 MBL positive strains by polymerase chain reaction (PCR). Five PCR positive strains were sent for sequence analysis. RESULTS: A total of 72 Acinetobacter strains were processed. Thirty-two strains were MBL positive phenotypically. All MBL positive strains were susceptible to colistin. Of 32 MBL positive strains, PCR was done on 15 strains. VIM gene was detected in all 15 strains. CONCLUSION: This study highlights the emergence of MBL strains. Hence, proper hospital infection control practices and rapid MBL detection by laboratory is important to avoid treatment failures.

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