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Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran

BACKGROUND: Metallo-beta-lactamase (MβL) enzymes production is one of the most important resistance mechanisms against carbapenems in some bacteria including Acinetobacter baumannii. AIMS: This study was aimed to determine the antimicrobial susceptibility and the prevalence of MβL among carbapenem-r...

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Autores principales: Moghadam, MN, Motamedifar, M, Sarvari, J, Sedigh, Ebrahim-Saraie H, Mousavi, Same M, Moghadam, FN
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Medknow Publications & Media Pvt Ltd 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4924489/
https://www.ncbi.nlm.nih.gov/pubmed/27398247
http://dx.doi.org/10.4103/2141-9248.183946
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author Moghadam, MN
Motamedifar, M
Sarvari, J
Sedigh, Ebrahim-Saraie H
Mousavi, Same M
Moghadam, FN
author_facet Moghadam, MN
Motamedifar, M
Sarvari, J
Sedigh, Ebrahim-Saraie H
Mousavi, Same M
Moghadam, FN
author_sort Moghadam, MN
collection PubMed
description BACKGROUND: Metallo-beta-lactamase (MβL) enzymes production is one of the most important resistance mechanisms against carbapenems in some bacteria including Acinetobacter baumannii. AIMS: This study was aimed to determine the antimicrobial susceptibility and the prevalence of MβL among carbapenem-resistant isolates of A. baumannii. MATERIALS AND METHODS: In this cross-sectional study from October 2012 to April 2013, 98 isolates were identified as A. baumannii using Microgen™ kits and confirmed by molecular method. These isolates were tested for antimicrobial susceptibilities by disk diffusion method according to the Clinical and Laboratory Standards Institute guidelines. Carbapenem-resistant isolates were further detected phenotypically by MβL minimal inhibitory concentration (MIC)-test strips, and subsequently positive MβL isolates were confirmed by polymerase chain reaction (PCR). RESULTS: Overall, 98% (96/98) of A. baumannii isolates were detected as carbapenem-resistant by MIC test. Highest sensitivity to the tested antibiotic with 42.9% (42/98) was observed to colistin. Of 96 carbapenem-resistant isolates, 43 were phenotypically positive for MβL; out of 43 isolates, 37 were confirmed for the presence of MβL genes by PCR. CONCLUSION: The frequency of drug resistance among the clinical samples of A. baumannii isolated in our study against most of the antibiotics was very high. Moreover, all MβL producing isolates were multidrug resistance. Therefore, systematic surveillance to detect MβL producing bacteria and rational prescription and use of carbapenems could be helpful to prevent the spread of carbapenem resistance.
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spelling pubmed-49244892016-07-08 Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran Moghadam, MN Motamedifar, M Sarvari, J Sedigh, Ebrahim-Saraie H Mousavi, Same M Moghadam, FN Ann Med Health Sci Res Original Article BACKGROUND: Metallo-beta-lactamase (MβL) enzymes production is one of the most important resistance mechanisms against carbapenems in some bacteria including Acinetobacter baumannii. AIMS: This study was aimed to determine the antimicrobial susceptibility and the prevalence of MβL among carbapenem-resistant isolates of A. baumannii. MATERIALS AND METHODS: In this cross-sectional study from October 2012 to April 2013, 98 isolates were identified as A. baumannii using Microgen™ kits and confirmed by molecular method. These isolates were tested for antimicrobial susceptibilities by disk diffusion method according to the Clinical and Laboratory Standards Institute guidelines. Carbapenem-resistant isolates were further detected phenotypically by MβL minimal inhibitory concentration (MIC)-test strips, and subsequently positive MβL isolates were confirmed by polymerase chain reaction (PCR). RESULTS: Overall, 98% (96/98) of A. baumannii isolates were detected as carbapenem-resistant by MIC test. Highest sensitivity to the tested antibiotic with 42.9% (42/98) was observed to colistin. Of 96 carbapenem-resistant isolates, 43 were phenotypically positive for MβL; out of 43 isolates, 37 were confirmed for the presence of MβL genes by PCR. CONCLUSION: The frequency of drug resistance among the clinical samples of A. baumannii isolated in our study against most of the antibiotics was very high. Moreover, all MβL producing isolates were multidrug resistance. Therefore, systematic surveillance to detect MβL producing bacteria and rational prescription and use of carbapenems could be helpful to prevent the spread of carbapenem resistance. Medknow Publications & Media Pvt Ltd 2016 /pmc/articles/PMC4924489/ /pubmed/27398247 http://dx.doi.org/10.4103/2141-9248.183946 Text en Copyright: © Annals of Medical and Health Sciences Research http://creativecommons.org/licenses/by-nc-sa/3.0 This is an open access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as the author is credited and the new creations are licensed under the identical terms.
spellingShingle Original Article
Moghadam, MN
Motamedifar, M
Sarvari, J
Sedigh, Ebrahim-Saraie H
Mousavi, Same M
Moghadam, FN
Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran
title Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran
title_full Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran
title_fullStr Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran
title_full_unstemmed Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran
title_short Emergence of Multidrug Resistance and Metallo-beta-lactamase Producing Acinetobacter baumannii Isolated from Patients in Shiraz, Iran
title_sort emergence of multidrug resistance and metallo-beta-lactamase producing acinetobacter baumannii isolated from patients in shiraz, iran
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4924489/
https://www.ncbi.nlm.nih.gov/pubmed/27398247
http://dx.doi.org/10.4103/2141-9248.183946
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