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Adeniji OO, Elsheikh EAE, Okoh AI. Prevalence of classes 1 and 2 integrons in multidrug-resistant Acinetobacter baumanni isolates recovered from some aquatic environment in South Africa. Sci Rep 2022; 12:20319. [PMID: 36434075 PMCID: PMC9700688 DOI: 10.1038/s41598-022-24724-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Accepted: 11/18/2022] [Indexed: 11/27/2022] Open
Abstract
The emergence of antibiotic-resistance genes (ARGs) by means of integrons in multidrug-resistant Acinetobacter baumannii (MDR A. baumannii) has become a significant challenge in the management of infections from this pathogen. In this paper, we report on the variable region of class 1 and 2 integrons observed in MDR A. baumanni isolates recovered from rivers in the Eastern Cape Province, South Africa. Class 1 and 2 integrons with their variable regions were evaluated with polymerase chain reaction techniques followed by sequencing. Antibiotic sensitivity testing, checkerboard assay, time-kill independent assay, and Enterobacterial Repetitive Intergenic Consensus Polymerase Chain Reaction (ERIC-PCR) were carried out using standard microbiological techniques. A total of fifty-six (56) isolates were examined, among which 45 (79%) tested positive for class 1 integron, and 7 (12.3%) had class 2 integron. None was found to be class 3 integron positive among the isolates. The variable region contained aadA1, aadA5, and aadA2 genes, which confer resistance against streptomycin and spectinomycin, aac(6')-Ib against amikacin/ tobramycin and dfrA17 genes against trimethoprim. The minimum inhibitory concentrations of the antimicrobials for one of the tested organisms were resistant against meropenem, colistin sodium methanesulfonate, tetracycline, ceftazidime, and ciprofloxacin (16, > 16, > 8, > 256, and 128 ug/mL respectively). The impact of colistin combined with quinolones (ciprofloxacin), with the FICIs (0.31) indicated synergistic effects against MDR A baumanni. However, when colistin was combined with meropenem and ceftazidime, additive effects with fractional inhibitory concentration (FIC) index ranging from 0.52 to 1 were observed. No antagonistic effect was evaluated among the examined isolates. ERIC-PCR analyses of A. baumanni isolates revealed significant genetic diversity, suggesting various sources of environmental contamination. We conclude that A. baumanni harbouring class 1 integrons in aquatic milieus are a significant source of ARGs and can transmit these elements to other organisms and consequently to man with significant public health implications.
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Affiliation(s)
- Oluwaseun Ola Adeniji
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa.
| | - Elsiddig A E Elsheikh
- Department of Applied Biology, College of Sciences, University of Sharjah, P.O. Box 27272, Sharjah, United Arab Emirates
| | - Anthony Ifeanyin Okoh
- SAMRC Microbial Water Quality Monitoring Centre, University of Fort Hare, Alice, 5700, South Africa
- Department of Environmental Health Sciences, College of Health Sciences, University of Sharjah, Sharjah, United Arab Emirates
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Alabdali YAJ. Antibiotic resistance and carriage class I integron in clinical isolates of Acinetobacter baumannii from Al Muthanna, Iraq. J Antibiot (Tokyo) 2022; 75:691-697. [PMID: 36195749 DOI: 10.1038/s41429-022-00569-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 09/08/2022] [Accepted: 09/12/2022] [Indexed: 11/09/2022]
Abstract
The goal of this work was to systematically characterize and detect class 1, 2, and 3 integrons with many antibiotic resistance A. baumannii strains collected from a clinical environment in Iraq's Al-Muthanna hospitals. In this investigation, 24 non-replicated clinical strains of A. baumannii were evaluated using Chrome agar as a selective medium and PCR of the rplB gene. The clonal relatedness of the isolates to class 1 integron was evaluated using a PCR technique. The prevalence of class 1 integron was detected by PCR in only 12 clones of A. baumannii followed by HinfI digestion analysis showing three identical bands at 160 bp, 1350 bp, and 870 bp. In addition, PCR sequencing confirmed the presence of gene cassette arrays consisting of aacA4-catB8-aadA1 (100%) in class 1 integron. The sequence analysis of the integron shows 97.87 identity with A. baumannii isolates from Australia (GenBank accession number CP054302) among A. baumannii isolates. The blast analysis of this class I integron showed that the presence of the intI1, aacA4-catB8-aadA1 genes can considerably boost the acquisition of MDR phenotypes in A. baumannii isolates. We concluded that antibiotics of many types are widely used. The presence of integrons in A. baumannii is concerning for public health. In the clinical setting, it appears that the class 1 integron can be used as a predictive biomarker for the presence of MDR phenotypes. In these bacteria, however, the integron does not possess carbapenemases genes.
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Profiling Antibiotic Resistance in Acinetobacter calcoaceticus. Antibiotics (Basel) 2022; 11:antibiotics11070978. [PMID: 35884232 PMCID: PMC9312123 DOI: 10.3390/antibiotics11070978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 07/14/2022] [Accepted: 07/15/2022] [Indexed: 12/10/2022] Open
Abstract
Background: Acinetobacter spp. have emerged as troublesome pathogens due to their multi-drug resistance. The majority of the work to date has focused on the antibiotic resistance profile of Acinetobacter baumannii. Although A. calcoaceticus strains are isolated in the hospital setting, limited information is available on these closely related species. Methods & Results: The computational analysis of antibiotic resistance genes in 1441 Acinetobacter genomes revealed that A. calcoaceticus harbored a similar repertoire of multi-drug efflux pump and beta-lactam resistance genes as A. baumannii, leading us to speculate that A. calcoaceticus would have a similar antibiotic resistance profile to A. baumannii. To profile the resistance patterns of A. calcoaceticus, strains were examined by Kirby−Bauer disk diffusion and phenotypic microarrays. We found that Acinetobacter strains were moderately to highly resistant to certain antibiotics within fluoroquinolones, aminoglycosides, tetracyclines, and other antibiotic classes. These data indicate that A. calcoaceticus has a similar antibiotic resistance profile as A. baumannii ATCC 19606. We also identified that all Acinetobacter species were sensitive to 5-fluoroorotic acid, novobiocin, and benzethonium chloride. Conclusion: Collectively, these data provide new insights into the antibiotic resistance in A. calcoaceticus and identify several antibiotics that could be beneficial in treating Acinetobacter infections.
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High Frequency of Class I and II Integrons and the Presence of aadA2 and dfrA12 Gene Cassettes in the Clinical Isolates of Acinetobacter baumannii from Shiraz, Southwest of Iran. Jundishapur J Microbiol 2022. [DOI: 10.5812/jjm.119436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Acinetobacter baumannii is a global concern that causes healthcare-associated infections due to multidrug resistance against commercially available antimicrobial agents. Objectives: The present study was conducted to determine the antimicrobial susceptibility of A. baumannii isolates from clinical specimens in Shiraz, Iran. In addition, the possible relationship of susceptibility patterns with the presence of integrons and related gene cassettes is investigated. Methods: A. baumannii isolates were collected, and their susceptibility to various antibiotics was tested using the Kirby-Bauer disk diffusion method. Moreover, molecular analyses were performed to detect the presence of the OXA-51-like gene, as well as class I, II, and III integrons, and associated gene cassettes. Results: The majority of isolates were resistant to imipenem (99.4%), piperacillin (98.2%), gentamycin (98.2%), meropenem (97.7%), ceftazidime (95.4%), amikacin (95.4%), and trimethoprim-sulfamethoxazole (90.8%). All strains showed multidrug resistance to the tested antibiotics. The distribution analysis of integrons genes revealed that 90.2, 72.4, and 12.1% of the isolates carried intI1, intI2, and intI3 genes, respectively. Moreover, two types of prevalent gene cassettes, including aad and dfr, were detected in class 1 integron-carrying strains. Conclusions: The current study showed the high prevalence of A. baumannii isolates harboring integrons in our investigated medical center, which may indicate the distribution of multidrug resistance events. The different gene cassette arrays in the present study highlight the remarkable role of geographical issues in disseminating multidrug-resistant isolates. This could be attributed to distinct therapeutic interventions in different areas. The results demonstrate the necessity of continuous surveillance to prevent the distribution of multidrug resistance among A. baumannii strains in Iran.
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Kirtikliene T, Mierauskaitė A, Razmienė I, Kuisiene N. Multidrug-Resistant Acinetobacter baumannii Genetic Characterization and Spread in Lithuania in 2014, 2016, and 2018. Life (Basel) 2021; 11:life11020151. [PMID: 33669401 PMCID: PMC7920459 DOI: 10.3390/life11020151] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 02/11/2021] [Accepted: 02/14/2021] [Indexed: 12/12/2022] Open
Abstract
Bacterial resistance to antimicrobial agents plays an important role in the treatment of bacterial infections in healthcare institutions. The spread of multidrug-resistant bacteria can occur during inter- and intra-hospital transmissions among patients and hospital personnel. For this reason, more studies must be conducted to understand how resistance occurs in bacteria and how it moves between hospitals by comparing data from different years and looking out for any patterns that might emerge. Multidrug-resistant (MDR) Acinetobacter spp. was studied at 14 healthcare institutions in Lithuania during 2014, 2016, and 2018 using samples from human bloodstream infections. In total, 194 isolates were collected and identified using MALDI-TOF and VITEK2 analyzers as Acinetobacter baumannii group bacteria. After that, the isolates were analyzed for the presence of different resistance genes (20 genes were analyzed) and characterized by using the Rep-PCR and MLVA (multiple-locus variable-number tandem repeat analysis) genotyping methods. The results of the study showed the relatedness of the different Acinetobacter spp. isolates and a possible circulation of resistance genes or profiles during the different years of the study. This study provides essential information, such as variability and diversity of resistance genes, genetic profiling, and clustering of isolates, to better understand the antimicrobial resistance patterns of Acinetobacter spp. These results can be used to strengthen the control of multidrug-resistant infections in healthcare institutions and to prevent potential outbreaks of this pathogen in the future.
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Affiliation(s)
- Tatjana Kirtikliene
- Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania;
- Correspondence: ; Tel.: +370-62156858
| | - Aistė Mierauskaitė
- National Public Health Surveillance Laboratory, Clinical Testing Department, LT-10257 Vilnius, Lithuania; (A.M.); (I.R.)
| | - Ilona Razmienė
- National Public Health Surveillance Laboratory, Clinical Testing Department, LT-10257 Vilnius, Lithuania; (A.M.); (I.R.)
| | - Nomeda Kuisiene
- Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University, LT-10257 Vilnius, Lithuania;
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Serwecińska L, Kiedrzyńska E, Kiedrzyński M. A catchment-scale assessment of the sanitary condition of treated wastewater and river water based on fecal indicators and carbapenem-resistant Acinetobacter spp. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 750:142266. [PMID: 33182211 DOI: 10.1016/j.scitotenv.2020.142266] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/22/2020] [Accepted: 09/06/2020] [Indexed: 05/14/2023]
Abstract
Urbanization and population growth have created considerable sanitation challenges in cities and communities in many parts of Europe and the world. As such, it is imperative to identify the most environmentally-harmful microbiological and chemical sources of pollution, these being wastewater treatment plants (WWTPs) which release wastewater of low quality. In the present manuscript, an extensive study was performed of the sanitary conditions of river water and treated wastewater from seventeen WWTPs of various sizes along the Pilica River catchment in central Poland, with the aim of identifying "hot spots" in terms of most serious sources of sanitary hazards. The bacteriological risk for the river, including fecal indicator bacteria (FIB) such as coliforms, E.coli, enterococci, C. perfringens, and carbapenem-resistant Acinetobacter spp. (CRA) were assessed using classical microbiological methods, and the physicochemical parameters were also tested. The WWTPs, particularly the small ones (<2000 people equivalent, PE) demonstrated significant variation regarding the physicochemical parameters. Carbapenem-resistant Acinetobacter spp. bacteria growing at 42 °C were found in the effluent wastewaters of all tested municipal WWTPs, and in most of the Pilica River water samples, presenting a potential hazard to public health. A positive correlation was identified between E. coli and CRA abundance in treated wastewater; however, no such relationship was found in river water. It was found that seven small treatment plants discharged wastewater with very different microbiological parameters. Moreover, three small treatment plants serving only 0.56% of the population in the studied area continuously released extremely high microbiological contamination, constituting as much as 54-82% of fecal indicator bacteria loads in the area studied. Our findings show that this type of comprehensive analysis may enable assessment of the use of the entire catchment area, thus identifying the most serious threats to surface water quality and guiding the actions needed to improve the worst operating WWTPs.
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Affiliation(s)
- Liliana Serwecińska
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90-364 Lodz, Poland
| | - Edyta Kiedrzyńska
- European Regional Centre for Ecohydrology of the Polish Academy of Sciences, Tylna 3, 90-364 Lodz, Poland; UNESCO Chair on Ecohydrology and Applied Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland.
| | - Marcin Kiedrzyński
- Department of Geobotany and Plant Ecology, Faculty of Biology and Environmental Protection, University of Lodz, Banacha12/16, 90-237 Lodz, Poland
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Molecular Characterization of Multiple Antibiotic-Resistant Acinetobacter baumannii Isolated from Egyptian Patients. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2020. [DOI: 10.22207/jpam.14.4.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Acinetobacter baumannii is an opportunistic microorganism commonly found in intensive care units (ICUs), and it is responsible for a broad span of hospital-acquired infections. Persistence of nosocomial infection caused by multidrug-resistant (MDR) A. baumannii is an alarming health care issue in Egypt, and at present, colistin remains the treatment of choice for the management of MDR A. baumannii infections. A. baumannii possesses great capacity to develop and acquire resistance to a broad range of antibiotics. The acquisition and dissemination of antibiotic-resistant determinants in A. baumannii strains are mediated by integrons, especially class I integrons. This study focuses on the characterization of some genetic mechanisms underlying the multidrug-resistant phenotypes of A. baumannii isolates in Egypt. Forty-eight A. baumannii specimens were isolated from different hospitalized patients; least resistance was observed against amikacin and tigecycline, with 60% and 58.5% of the isolates resistant, respectively, whereas 62.5% of the isolates were resistant to imipenem and meropenem. The highest sensitivity was found for colistin. Genetic analysis revealed that blaoxa-51 was detected in all isolates, the blaoxa-23-like gene was detected in 80% of the isolates, and blaoxa-24 and blaoxs-58 were not detected in any isolate. Finally, PCR analysis revealed that 6.6% of isolates carried the class I integron gene.
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Frequency of Metalo beta Lactamase genes, bla IMP1, INT 1 in Acinetobacter baumanii isolated from burn patients North of Iran. GENE REPORTS 2020. [DOI: 10.1016/j.genrep.2020.100800] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Paul D, Mallick S, Das S, Saha S, Ghosh AK, Mandal SM. Colistin Induced Assortment of Antimicrobial Resistance in a Clinical Isolate of Acinetobacter baumannii SD01. Infect Disord Drug Targets 2020; 20:501-505. [PMID: 32234005 DOI: 10.2174/1871526519666190426153258] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2018] [Revised: 02/15/2019] [Accepted: 04/11/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND Colistin was considered as the most effective antibiotic against Acinetobacter baumannii, a widely-known opportunistic pathogen. In recent years, a number of colistin resistant strains have also been reported. OBJECTIVE This work is commenced to investigate the contribution of efflux pumps toward resistance to colistin-like cyclic polypeptide antibiotics, since the efflux pumps serve as the escape routes leading to drug-resistance. METHODS RNA was extracted from A. baumannii isolates cultured from samples procured by tracheal aspiration of infected patients. The expressions of gene(s) that played major roles in the regulation of efflux pump families and involvement of integron systems were studied using real time PCR. Antimicrobial susceptibility tests were conducted to investigate antibiotic resistance of the isolates. RESULTS It was observed that genes coding for sugE, ydhE, ydgE, mdfA, ynfA and tolC significantly contributed to resistance against colistin antibiotics, however, no significant transcriptional change was observed in the efflux pump, MexAB-OprM. Results suggest that A. baumanii readily pumps out colistin via efflux pumps belonging to MATE and SMR family. CONCLUSION Integral role of efflux pumps and integron 1 genetic system was elucidated towards evolution of multi-drug resistant strain(s). Therefore, for accurate therapeutics, an early detection of efflux genes is crucial before prescribing against colistin resistant A. baumanii.
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Affiliation(s)
- Debarati Paul
- Amity Institute of Biotechnology, Amity University, Noida, sector 125, 201313, UP, India
| | - Swarupa Mallick
- Central Research Facility, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Swati Das
- Central Research Facility, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Suman Saha
- Priyamvada Birla Aravind Eye Hospital, Kolkata, 700017, WB, India
| | - Ananta K Ghosh
- Central Research Facility, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
| | - Santi M Mandal
- Central Research Facility, Department of Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur 721302, WB, India
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Veress A, Nagy T, Wilk T, Kömüves J, Olasz F, Kiss J. Abundance of mobile genetic elements in an Acinetobacter lwoffii strain isolated from Transylvanian honey sample. Sci Rep 2020; 10:2969. [PMID: 32076091 PMCID: PMC7031236 DOI: 10.1038/s41598-020-59938-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 02/03/2020] [Indexed: 11/15/2022] Open
Abstract
Based on phylogenetic analyses, strain M2a isolated from honey, an unexpected source of acinetobacters, was classified as Acinetobacter lwoffii. The genome of this strain is strikingly crowded with mobile genetic elements. It harbours more than 250 IS elements of 15 IS-families, several unit and compound transposons and 15 different plasmids. These IS elements, including 30 newly identified ones, could be classified into at least 53 IS species. Regarding the plasmids, 13 of the 15 belong to the Rep-3 superfamily and only one plasmid, belonging to the “Low-GC” family, possesses a seemingly complete conjugative system. The other plasmids, with one exception, have a mobilization region of common pattern, consisting of the divergent mobA/mobL-family and mobS-, mobC- or traD-like genes separated by an oriT-like sequence. Although two plasmids of M2a are almost identical to those of A. lwoffi strains isolated from gold mine or Pleistocene sediments, most of them have no close relatives. The presence of numerous plasmid-borne and chromosomal metal resistance determinants suggests that M2a previously has also evolved in a metal-polluted environment. The numerous, possibly transferable, plasmids and the outstanding number of transposable elements may reflect the high potential of M2a for rapid evolution.
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Affiliation(s)
- Alexandra Veress
- Department of Genetics, Agricultural Biotechnology Institute, National Agricultural Research and Innovation Centre, Gödöllő, H-2100, Hungary
| | - Tibor Nagy
- Department of Genetics, Agricultural Biotechnology Institute, National Agricultural Research and Innovation Centre, Gödöllő, H-2100, Hungary
| | - Tímea Wilk
- Department of Genetics, Agricultural Biotechnology Institute, National Agricultural Research and Innovation Centre, Gödöllő, H-2100, Hungary
| | - János Kömüves
- Department of Genetics, Agricultural Biotechnology Institute, National Agricultural Research and Innovation Centre, Gödöllő, H-2100, Hungary
| | - Ferenc Olasz
- Department of Genetics, Agricultural Biotechnology Institute, National Agricultural Research and Innovation Centre, Gödöllő, H-2100, Hungary
| | - János Kiss
- Department of Genetics, Agricultural Biotechnology Institute, National Agricultural Research and Innovation Centre, Gödöllő, H-2100, Hungary.
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Kirtikliene T, Naugzemys D, Steponkiene A, Bogdevic R, Vizuje G, Zvingila D, Kuisiene N. Evaluation of the Inter- and Intrahospital Spread of Multidrug Resistant Gram-Negative Bacteria in Lithuanian Hospitals. Microb Drug Resist 2018; 25:326-335. [PMID: 30339100 DOI: 10.1089/mdr.2018.0160] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Spread of multidrug-resistant pathogenic bacteria became one of the greatest threats in healthcare worldwide. It is generally accepted that both inter- and intrahospital transmissions of these bacteria contribute significantly to this problem. The purpose of the current study was the evaluation of the inter- and intrahospital spread of multidrug resistant Gram-negative pathogenic bacteria in Lithuania. Clinical isolates of Acinetobacter sp., Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa were subjected for the screening for extended spectrum β-lactamase, carbapenemase, as well as plasmid-mediated AmpC β-lactamase genes. BOX-PCR genotyping was used for the genotyping of these isolates. Our results show that all four pathogens are involved in the intra- and/or interhospital dissemination between the Lithuanian healthcare institutions. The level of transmissions differed between pathogens, and the worst situation was detected for Acinetobacter sp. followed by E. coli. In almost all cases, transmissible strains had at least one gene conferring β-lactam resistance, thereby contributing to the dissemination of the resistance determinants in and between Lithuanian hospitals. Our study clearly demonstrated that immediate actions, more effective strategy, and surveillance are needed to confine and prevent further spread of multidrug resistant Gram-negative pathogenic bacteria in Lithuanian healthcare institutions.
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Affiliation(s)
- Tatjana Kirtikliene
- 1 Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University , Vilnius, Lithuania .,2 Department of Clinical Testing , National Public Health Surveillance Laboratory, Vilnius, Lithuania
| | - Donatas Naugzemys
- 3 Botanical Garden of Vilnius University, Vilnius University , Vilnius, Lithuania
| | - Ana Steponkiene
- 2 Department of Clinical Testing , National Public Health Surveillance Laboratory, Vilnius, Lithuania
| | - Robert Bogdevic
- 2 Department of Clinical Testing , National Public Health Surveillance Laboratory, Vilnius, Lithuania
| | - Greta Vizuje
- 2 Department of Clinical Testing , National Public Health Surveillance Laboratory, Vilnius, Lithuania
| | - Donatas Zvingila
- 4 Department of Botany and Genetics, Institute of Biosciences, Life Sciences Center, Vilnius University , Vilnius, Lithuania
| | - Nomeda Kuisiene
- 1 Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University , Vilnius, Lithuania
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Plasmid-Mediated Class 1 and 2 Integron Carriage in Drug-Resistant Nosocomial Isolates of Acinetobacter baumannii. ARCHIVES OF CLINICAL INFECTIOUS DISEASES 2018. [DOI: 10.5812/archcid.57813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Halaji M, Rezaei A, Zalipoor M, Faghri J. Investigation of Class I, II, and III Integrons Among Acinetobacter Baumannii Isolates from Hospitalized Patients in Isfahan, Iran. Oman Med J 2018; 33:37-42. [PMID: 29467997 DOI: 10.5001/omj.2018.07] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Objectives This study aimed to determine the prevalence of class I, II, and III integrons among clinical Acinetobacter baumannii isolates collected from hospitalized patients. Methods This cross-sectional study was conducted at two teaching hospitals in Isfahan, Iran, from October 2015 to October 2016. A total of 147 non-duplicate A. baumannii isolates were collected from clinical specimens and identified as A. baumannii using standard microbiological methods and confirmed by genotyping. Antimicrobial susceptibility was determined using disc diffusion method, and the presence of integron genes was performed using the polymerase chain reaction. Results Out of 147 confirmed A. baumannii isolates, 97.3% of isolates were extensive drug-resistant (XDR) and 2.7% were multidrug-resistant (MDR). Class I and II integrons were detected in 63.9% and 78.2% of the A. baumannii, respectively. Class III integron was not detected in any of the isolates. Conclusion Our results show a high prevalence of classes I and II integrons which may play a key role in the acquisition of MDR and XDR phenotype among A. baumannii isolates in our region. Therefore, use of appropriate infection control in clinical settings and implementation of treatment strategies is necessary for our hospitals.
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Affiliation(s)
- Mehrdad Halaji
- Department of Microbiology, School of medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Aliakbar Rezaei
- Department of Microbiology, School of medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mehrdad Zalipoor
- Department of Microbiology, School of medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Jamshid Faghri
- Department of Microbiology, School of medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Distribution of Aminoglycoside Resistance Genes Among Acinetobacter Baumannii Strains Isolated From Burn Patients in Tehran, Iran. ARCHIVES OF PEDIATRIC INFECTIOUS DISEASES 2017. [DOI: 10.5812/pedinfect.57263] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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15
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Dissemination of Classes 1, 2, and 3 Integrons in Acinetobacter baumannii Strains Recovered from Intensive Care Units Using Polymerase Chain Reaction-Restriction Fragment Length Polymorphism. Jundishapur J Microbiol 2017. [DOI: 10.5812/jjm.13100] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Mohajeri P, Farahani A, Mehrabzadeh RS. Molecular Characterization of Multidrug Resistant Strains of Acinetobacter baumannii Isolated from Intensive Care Units in West of Iran. J Clin Diagn Res 2017; 11:DC20-DC22. [PMID: 28384861 DOI: 10.7860/jcdr/2017/21156.9397] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Accepted: 07/08/2016] [Indexed: 11/24/2022]
Abstract
INTRODUCTION According to the results of various studies using phenotypic methods, the prevalence of Multidrug Resistant (MDR) Acinetobacter baumannii (A. baumannii) isolates has been increasing worldwide. Pulsed-Field Gel Electrophoresis (PFGE) technique is known as the gold standard method to determine clonal characterization of bacterial species, especially A. baumannii. AIM To determine the clonal relatedness and investigate the prevalence of integron classes 1 and 2 and genes encoding OXA-23 and 24 in A.baumanii isolates. MATERIALS AND METHODS A cross-sectional study was conducted from November 2011 to January 2013. A total of 140 A.baumannii isolates collected from three hospitals of Kermanshah were considered out of which 75 ICU isolates were included in this study. Antibiotics susceptibility test was done by disk diffusion method. Polymerase Chain Reaction (PCR) was performed in order to detect class 1 and 2 integrons and blaOXA-23-like, blaOXA-24-like genes. Isolates identified as MDR from a total of 75 Intensive Care Units (ICU) strains were subjected to genotyping for clonal relatedness. RESULTS A total of 37 isolates among 75 ICU isolates were identified as MDR. The maximum drug resistance was observed against ceftriaxone, mezlocycline, cefotaxime, piperacilin, ciprofloxacin and imipenem. Frequency of Class 1 and Class 2 Integrons, blaOXA-23-like and blaOXA-24-like genes were 33(44%), 27(36%), 60(80%) and 14(18.6%) respectively. Four clusters with high level of similarity were obtained showing homogeneity among MDR isolates. CONCLUSION Significant correlation between presence of integrons and resistance to different classes of antibiotic was observed in this study. Monitoring of drug resistance using gene integrase PCR and blaOXA gene by cluster analysis is very important to plan specific infection control measures due to MDR A. baumannii.
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Affiliation(s)
- Parviz Mohajeri
- Associate Professor, Department of Microbiology, Kermanshah University of Medical Sciences , Kermanshah, Iran
| | - Abbas Farahani
- Student Research Committee, Ahvaz Jundishapur University of Medical Sciences , Ahvaz, Iran; PhD Candidate, Research Assistant, Department of Microbiology, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Rasa Sheini Mehrabzadeh
- PhD Student, Research Assistant, Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz , Ahvaz, Iran
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Goudarzi H, Azad M, Seyedjavadi SS, Azimi H, Salimi Chirani A, Fallah Omrani V, Goudarzi M. Characterization of integrons and associated gene cassettes in Acinetobacter baumannii strains isolated from intensive care unit in Tehran, Iran. JOURNAL OF ACUTE DISEASE 2016. [DOI: 10.1016/j.joad.2016.08.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Sun F, Ou Q, Wang Q, Feng W, Qiu X, Chen J, Liu Y, Xia P. The resistance and transmission mechanism of Acinetobacter baumannii isolates in a tertiary care hospital, China. J Chemother 2016; 28:476-481. [PMID: 27077932 DOI: 10.1080/1120009x.2016.1139335] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The aim of this study was to analyse the resistance and epidemiological data of 117 Acinetobacter baumannii isolates from Southwest Hospital, Chongqing, China. Except for polymyxin B, tigecycline, minocycline, cefoperazone/sulbactam, amikacin and levofloxacin, the resistance rates of other antimicrobial agents were above 90%. All the clinical isolates had the blaOXA-51 gene and 114 isolates had the blaOXA-23 gene. Forty-nine isolates were found to contain the blaIMP-4 gene. PFGE data showed that 117 isolates were divided into 25 groups. Sixty-three (53.85%) were found to carry the class 1 integron, and the sequence analysis of the class 1 integron internal variable regions - five types, one of which had the blaIMP-4 gene. For the blaIMP-4 positive strain without class 1 integron, we found the flanking sequence had the TnpA gene. The result suggested that the resistance gene was widely distributed in our hospital; moreover, the modes of presence and transmission are different and complicated. The results of our study can improve the infection empirical treatment method and infection control programme.
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Affiliation(s)
- Fengjun Sun
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
| | - Qianyi Ou
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
| | - Qian Wang
- b Department of Pharmacy, Xinqiao Hospital , Third Military Medical University , Chongqing , China
| | - Wei Feng
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
| | - Xuewen Qiu
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
| | - Jianhong Chen
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
| | - Yao Liu
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
| | - Peiyuan Xia
- a Department of Pharmacy, Southwest Hospital , Third Military Medical University , Chongqing , China
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