ArticleJundishapur journal of microbiology2016
Characterization of Oxacillinase and Metallo-β-Lactamas Genes and Molecular Typing of Clinical Isolates of Acinetobacter baumannii in Ahvaz, South-West of Iran.
Article in Jundishapur journal of microbiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 22 citations in OpenAlex.
- Identification of blaBMC research notes · 2024Article
- Application of bacteriophage cocktails for reducing the bacterial load of nosocomial pathogens in hospital wastewater.Iranian journal of microbiology · 2022Article
- Molecular Characterization of Carbapenem-ResistantAntibiotics (Basel, Switzerland) · 2021Article
- Molecular survey of aminoglycoside-resistantNew microbes and new infections · 2021Article
- Carbapenem resistance inIranian journal of microbiology · 2021Article
- Evaluating the frequency of carbapenem and aminoglycoside resistance genes among clinical isolates ofNew microbes and new infections · 2020Article
- Phenotypic and genotypic detection of metallo-beta-lactamases in Carbapenem resistant Acinetobacter baumannii.Caspian journal of internal medicine · 2020Article
- Virulence characteristics of multidrug resistant biofilm forming Acinetobacter baumannii isolated from intensive care unit patients.BMC infectious diseases · 2019Article
- Understanding the Epidemiology of Multi-Drug Resistant Gram-Negative Bacilli in the Middle East Using a One Health Approach.Frontiers in microbiology · 2019Review
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6 authors at 4 institutions in 1 country.
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Abstract
backgroundCarbapenem resistant Acinetobacter baumannii is an important nosocomial pathogen associated with a variety of infections.
objectivesThe current study aimed to characterize the antimicrobial susceptibility, analyze the prevalence of oxacillinase and metallo-β-lactamase (MBL) genes and molecular typing of clinical isolates of A. baumannii. MATERIALS AND
methodsA total of 124 non-repetitive isolates of A. baumannii were collected from various clinical specimens in two teaching hospitals in Ahvaz, south-west of Iran. Antimicrobial susceptibility test was carried out by disk diffusion method. The minimum inhibitory concentrations (MICs) of imipenem, meropenem, colistin and tigecycline were determined using E-test. To screen for MBL production, double disk synergy (DDs) test and MBL E-test were performed. The presence of bla OXA-23-like, bla OXA-24-like, bla OXA-51-like, bla OXA-58-like, bla VIM, bla IMP and bla SPM genes was assessed by polymerase chain reaction (PCR). To identify clonal relatedness, all isolates were subjected to repetitive sequence-based PCR (rep-PCR).
resultsBased on disk diffusion results, the highest rate of resistance was observed in rifampin (96.8%). Colistin and polymyxin-B were the most effective agents in vitro. According to the MIC results, the rate of resistance to imipenem, meropenem, colistin and tigecycline were 78.2%, 73.4%, 0.8% and 0, respectively. Metallo-β-lactamase production was positive in 42.3% and 79.4% of the isolates by DDs test and E-test, respectively. All isolates (100%) carried bla OXA-51-like gene. According to the results of multiplex PCR, bla OXA-23-like and bla OXA-24-like genes were detected in 85.6% and 6.2% of carbapenem resistant isolates, respectively. No bla OXA-58- like, bla VIM, bla IMP and bla SPM were detected. By rep-PCR, carbapenem resistant isolates were separated into six genotypes (A to F). Genotype A (30.9%) was the most prevalent (P value < 0.001). Genotypes B and C were found in 28.9% and 26.8% of the isolates, respectively.
conclusionsThe rate of carbapenem resistant A. baumannii isolates were high in this study. Since, bla OXA-58-like or MBL genes were not detected, it seems that resistance to carbapenems is related to bla OXA-23-like and bla OXA-24-like. Moreover, bla OXA-23-like was the most prevalent oxacillinase (OXA) gene. Most of the isolates belonged to one of the four dominant genotypes indicating clonal dissemination in the hospitals under study. In order to control the spread of carbapenem-resistant A. baumannii, infection- control strategies are needed.
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