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Nageeb WM, AlHarbi N, Alrehaili AA, Zakai SA, Elfadadny A, Hetta HF. Global genomic epidemiology of chromosomally mediated non-enzymatic carbapenem resistance in Acinetobacter baumannii: on the way to predict and modify resistance. Front Microbiol 2023; 14:1271733. [PMID: 37869654 PMCID: PMC10587612 DOI: 10.3389/fmicb.2023.1271733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 09/05/2023] [Indexed: 10/24/2023] Open
Abstract
Introduction Although carbapenemases are frequently reported in resistant A. baumannii clinical isolates, other chromosomally mediated elements of resistance that are considered essential are frequently underestimated. Having a wide substrate range, multidrug efflux pumps frequently underlie antibiotic treatment failure. Recognizing and exploiting variations in multidrug efflux pumps and penicillin-binding proteins (PBPs) is an essential approach in new antibiotic drug discovery and engineering to meet the growing challenge of multidrug-resistant Gram-negative bacteria. Methods A total of 980 whole genome sequences of A. baumannii were analyzed. Nucleotide sequences for the genes studied were queried against a custom database of FASTA sequences using the Bacterial and Viral Bioinformatics Resource Center (BV-BRC) system. The correlation between different variants and carbapenem Minimum Inhibitory Concentrations (MICs) was studied. PROVEAN and I-Mutant predictor suites were used to predict the effect of the studied amino acid substitutions on protein function and protein stability. Both PsiPred and FUpred were used for domain and secondary structure prediction. Phylogenetic reconstruction was performed using SANS serif and then visualized using iTOL and Phandango. Results Exhibiting the highest detection rate, AdeB codes for an important efflux-pump structural protein. T48V, T584I, and P660Q were important variants identified in the AdeB-predicted multidrug efflux transporter pore domains. These can act as probable targets for designing new efflux-pump inhibitors. Each of AdeC Q239L and AdeS D167N can also act as probable targets for restoring carbapenem susceptibility. Membrane proteins appear to have lower predictive potential than efflux pump-related changes. OprB and OprD changes show a greater effect than OmpA, OmpW, Omp33, and CarO changes on carbapenem susceptibility. Functional and statistical evidence make the variants T636A and S382N at PBP1a good markers for imipenem susceptibility and potential important drug targets that can modify imipenem resistance. In addition, PBP3_370, PBP1a_T636A, and PBP1a_S382N may act as potential drug targets that can be exploited to counteract imipenem resistance. Conclusion The study presents a comprehensive epidemiologic and statistical analysis of potential membrane proteins and efflux-pump variants related to carbapenem susceptibility in A. baumannii, shedding light on their clinical utility as diagnostic markers and treatment modification targets for more focused studies of candidate elements.
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Affiliation(s)
- Wedad M. Nageeb
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Suez Canal University, Ismailia, Egypt
| | - Nada AlHarbi
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Amani A. Alrehaili
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Taif University, Taif, Saudi Arabia
| | - Shadi A. Zakai
- Department of Clinical Microbiology and Immunology, Faculty of Medicine, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ahmed Elfadadny
- Department of Animal Internal Medicine, Faculty of Veterinary Medicine, Damanhour University, Damanhour, El-Beheira, Egypt
| | - Helal F. Hetta
- Department of Medical Microbiology and Immunology, Faculty of Medicine, Assiut University, Assiut, Egypt
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Al-Rashed N, Bindayna KM, Shahid M, Saeed NK, Darwish A, Joji RM, Al-Mahmeed A. Prevalence of Carbapenemases in Carbapenem-Resistant Acinetobacter baumannii Isolates from the Kingdom of Bahrain. Antibiotics (Basel) 2023; 12:1198. [PMID: 37508294 PMCID: PMC10376280 DOI: 10.3390/antibiotics12071198] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Revised: 07/12/2023] [Accepted: 07/14/2023] [Indexed: 07/30/2023] Open
Abstract
BACKGROUND Acinetobacter baumannii is regarded as a significant cause of death in hospitals. The WHO recently added carbapenem-resistant Acinetobacter baumannii (CRAB) to its global pathogen priority list. There is a dearth of information on CRAB from our region. METHODS Fifty CRAB isolates were collected from four main hospitals in Bahrain for this study. Bacterial identification and antibiotic susceptibility tests were carried out using the BD PhoenixTM and VITEK-2 compact, respectively. Using conventional PCR, these isolates were further screened for carbapenem resistance markers (blaOXA-51, blaOXA-23, blaOXA-24, blaOXA-40, blaIMP, blaNDM, blaVIM, and blaKPC). RESULTS All of the isolates were resistant to imipenem (100%), meropenem (98%), and cephalosporins (96-98%), followed by other commonly used antibiotics. All these isolates were least resistant to gentamicin (64%). The detection of resistance determinants showed that the majority harbored blaOXA-51 (100%) and blaIMP (94%), followed by blaOXA-23 (82%), blaOXA-24 (46%), blaOXA-40 (14%), blaNDM (6%), blaVIM (2%), and blaKPC (2%). CONCLUSION The study isolates showed a high level of antibiotic resistance. Class D carbapenemases were more prevalent in our CRAB isolate collection. The resistance genes were found in various combinations. This study emphasizes the importance of strengthening surveillance and stringent infection control measures in clinical settings to prevent the emergence and further spread of such isolates.
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Affiliation(s)
- Nouf Al-Rashed
- Department of Microbiology, Immunology, and Infectious Diseases, College of Medicine & Medical Sciences, Arabian Gulf University, Manama P.O. Box 26671, Bahrain
| | - Khalid M Bindayna
- Department of Microbiology, Immunology, and Infectious Diseases, College of Medicine & Medical Sciences, Arabian Gulf University, Manama P.O. Box 26671, Bahrain
| | - Mohammad Shahid
- Department of Microbiology, Immunology, and Infectious Diseases, College of Medicine & Medical Sciences, Arabian Gulf University, Manama P.O. Box 26671, Bahrain
| | - Nermin Kamal Saeed
- Department of Pathology, Microbiology Section, Al- Salmaniya Medical Complex, Manama P.O. Box 12, Bahrain
| | - Abdullah Darwish
- Department of Pathology, Microbiology Section, Bahrain Defense Force Hospital, West Riffa P.O. Box 28743, Bahrain
| | - Ronni Mol Joji
- Department of Microbiology, Immunology, and Infectious Diseases, College of Medicine & Medical Sciences, Arabian Gulf University, Manama P.O. Box 26671, Bahrain
| | - Ali Al-Mahmeed
- Department of Microbiology, Immunology, and Infectious Diseases, College of Medicine & Medical Sciences, Arabian Gulf University, Manama P.O. Box 26671, Bahrain
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Kumari K, Sharma PK, Ma Y, Singh RP. First Report on the Versatile Secretome of an Environmental Isolate Acinetobacter pittii S-30. Curr Microbiol 2023; 80:202. [PMID: 37145205 DOI: 10.1007/s00284-023-03313-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 04/22/2023] [Indexed: 05/06/2023]
Abstract
Acinetobacter species is currently ranked as high-priority pathogen for their extraordinary ability to become resistant to almost all existing antibiotics. The diverse range of effectors secreted by Acinetobacter spp. constitutes a significant proportion of the virulence arsenal. Therefore, our study aims to characterize the secretome of Acinetobacter pittii S-30. Analysis of extracellular secreted proteins of A. pittii S-30 revealed the presence of transporter proteins, outer membrane proteins, molecular chaperones, porins, and several proteins of unknown function. Additionally, proteins related to metabolism, as well as those involved in gene expression and protein translation, type VI secretion system (T6SS) proteins, and stress response-related proteins were also identified in the secretome. The comprehensive analysis of secretome revealed putative protein antigens which could elicit substantial immune response. The limited availability of effective antibiotics and the worldwide growth of secretome data make this approach appealing in the development of effective vaccines against Acinetobacter and other bacterial pathogens.
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Affiliation(s)
- Kiran Kumari
- Department of Bioengineering and Biotechnology BIT Mesra, Ranchi, Jharkhand, 835215, India
| | - Parva Kumar Sharma
- Department of Plant Sciences and Landscape Architecture, University of Maryland, College Park, MD, 20742, USA
| | - Ying Ma
- College of Resources and Environment, Southwest University, Chongqing, China
| | - Rajnish Prakash Singh
- Department of Bioengineering and Biotechnology BIT Mesra, Ranchi, Jharkhand, 835215, India.
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4
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Kong X, Chen T, Guo L, Zhou Y, Lu P, Xiao Y. Phenotypic and genomic comparison of dominant and nondominant sequence-type of Acinetobacter baumannii isolated in China. Front Cell Infect Microbiol 2023; 13:1118285. [PMID: 36891157 PMCID: PMC9986592 DOI: 10.3389/fcimb.2023.1118285] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Accepted: 01/31/2023] [Indexed: 02/22/2023] Open
Abstract
A. baumannii is a common clinical pathogen that often causes pneumonia and bloodstream infections in ICU patients. Sequence types (ST) are used to investigate the distribution and spread of A. baumannii. Biological characteristics such as virulence and resistance may play a role in A. baumannii becoming a specific dominant ST(DST,ST191, ST195 and ST208) strain. To characterize the biological, genetic, and transcriptomic differences between the DST and non-dominant ST(NST,ST462 and ST547,etc.) strains in A. baumannii, we performed several biological experiments and genetic, and transcriptomic analyses. The DST group displayed more resistance ability to desiccation, oxidation, multiple antibiotics, and complement killing than the NST group. However, the latter had higher biofilm formation ability than the former. The genomic analysis showed the DST group exhibited more capsule-related and aminoglycoside-resistant genes. Besides, GO analysis indicated that functions involved in lipid biosynthetic, transport, and the metabolic process were up-regulated in the DST group, while KEGG analysis manifested that the two-component system related to potassium ion transport and pili were down-regulated. In short, resistance to desiccation, oxidation, multiple antibiotics, and serum complement killing are important reasons for the formation of DST. Genes related to capsule synthesis and lipid biosynthesis and metabolism play an important role at the molecular level in the formation of DST.
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Affiliation(s)
- Xiaoyang Kong
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tao Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lihua Guo
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yanzi Zhou
- Department of Rheumatology, Affiliated Hangzhou First People’s Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ping Lu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
- Jinan Microecological Biomedicine Shandong Laboratory, Jinan, China
- *Correspondence: Yonghong Xiao,
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Borges Duarte DF, Gonçalves Rodrigues A. Acinetobacter baumannii: insights towards a comprehensive approach for the prevention of outbreaks in health-care facilities. APMIS 2022; 130:330-337. [PMID: 35403751 DOI: 10.1111/apm.13227] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 04/07/2022] [Indexed: 12/14/2022]
Abstract
Acinetobacter baumannii is known to be an opportunistic pathogen frequently responsible for outbreaks in health-care facilities, particularly in Intensive Care Units (ICU). It can easily survive in the hospital setting for long periods and can be transmitted throughout the hospital in a variety of ways, explored in this review. It can also easily acquire antibiotic resistance determinants rendering several antibiotic drugs useless. In 2019, the US Centre for Disease Control (CDC) considered the organism as an urgent threat. The aim of this review was to raise the awareness of the medical community about the relevance of this pathogen and discuss how it may impact seriously the healthcare institutions particularly in the aftermath of the recent COVID-19 pandemic. PubMed was searched, and articles that met inclusion criteria were reviewed. We conclude by the need to raise awareness to this pathogen's relevance and to encourage the implementation of preventive measures in order to mitigate its consequences namely the triage of specific high-risk patients.
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Affiliation(s)
- Diogo Filipe Borges Duarte
- Division of Microbiology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.,CINTESIS - Center for Health Technology and Services Research, Porto, Portugal
| | - Acácio Gonçalves Rodrigues
- Division of Microbiology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal.,CINTESIS - Center for Health Technology and Services Research, Porto, Portugal.,RISE - Health Research Network, Porto, Portugal.,Burn Unit, Department of Plastic and Reconstructive Surgery, S. Joao University Center Hospital, Porto, Portugal
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Khaled JM, Alharbi NS, Siddiqi MZ, Alobaidi AS, Nauman K, Alahmedi S, Almazyed AO, Almosallam MA, Al Jurayyan AN. A synergic action of colistin, imipenem, and silver nanoparticles against pandrug-resistant Acinetobacter baumannii isolated from patients. J Infect Public Health 2021; 14:1679-1685. [PMID: 34627065 DOI: 10.1016/j.jiph.2021.09.015] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 09/07/2021] [Accepted: 09/16/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The upgrowth and rapid prevalence of pandrug-resistant Acinetobacter baumannii strains that have a pathogenic activity to cause several infections are of considerable influence on the health of communities worldwide. No infections by these bacterial strains were recorded before 1998, and currently, the numbers are on the rise. METHODS The A. baumannii strains were isolated from male and female patients in Medical Microbiology Department, King Fahd Medical City (KFMC) in Riyadh, Saudi Arabia between 1/1/2020 to 29/12/2020. The statistical analysis was performed base on sex, age, source of samples, and response to commercially available antibiotics. The A. baumannii strains that resisted all the antibiotics including colistin and imipenem were selected for the synergic test. RESULTS The data showed that 62.28%, 77.07% of 342 A. baumannii strains were isolated from males and patients over 35 years of age. A. baumannii strains (pandrug-A. baumannii) that can resist all tested antibiotics were 8.19%. The major source of the A. baumannii isolates was the respiratory system (>50%). Among all isolates (N = 342), azidothymidine-resistant A. baumannii strains were more than 85%. There is a statistically significant difference (P < 0.05) in the number of colistin-resistant A. baumannii strains isolated from males comparing with the female. The combinations of colistin and silver nanoparticles or imipenem and silver nanoparticles resulted in synergistic action led to reduction of MICs of colistin, imipenem, and silver nanoparticles (more than four-fold reduction). Also, the combinations of colistin and imipenem had high synergistic action. CONCLUSION The pandrug-resistant A. baumannii strains may represent a current and future threat that must be fought, and the synergy action of antibiotics and nanoparticles may be one of the available, rapid, and easy strategies to confront this global problem.
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Affiliation(s)
- Jamal M Khaled
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia.
| | - Naiyf S Alharbi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Muhammad Z Siddiqi
- Department of Biotechnology, Hankyong National University, 327 Jungang-ro Anseong-Si, Gyeonggi-do 17579, South Korea
| | - Ahmed S Alobaidi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Khaled Nauman
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Salah Alahmedi
- Department of Botany and Microbiology, College of Science, King Saud University, PO Box 4255, Riyadh 11451, Saudi Arabia
| | - Abeer O Almazyed
- Microbiology Department, King Fahd Medical City, Riyadh, Saudi Arabia
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Yu XR, Huang ST, Xu N, Dai WS, Wang ZC, Cao H, Chen Q. Comparison of the Effect of Breast Milk and Sodium Bicarbonate Solution for Oral Care in Infants with Tracheal Intubation After Cardiothoracic Surgery. Breastfeed Med 2021; 16:568-572. [PMID: 33156688 DOI: 10.1089/bfm.2020.0239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Background: This study aimed to explore the effect of breast milk and sodium bicarbonate solution used in oral care of infants with tracheal intubation after cardiothoracic surgery. Methods: A randomized clinical controlled trial was conducted in a provincial hospital in China. Fifty infantile patients were randomly divided into two groups: the patients in the study group (n = 25) used breast milk for oral care and the patients in the control group (n = 25) used sodium bicarbonate solution for oral care. The relevant clinical data were recorded, including the mechanical ventilation duration, length of intensive care unit (ICU) stay, length of hospital stay, and complications. Results: The length of ICU stay, length of hospital stay, and duration of mechanical ventilation were shorter in the study group, but the difference was not statistically significant (p > 0.05). However, the incidence of thrush and ventilator-associated pulmonary infection in the study group was significantly lower than that in the control group (p < 0.05). Conclusion: The use of breast milk for oral care has a positive effect on the prevention of thrush and ventilator-associated pulmonary infection in infants with tracheal intubation after cardiothoracic surgery.
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Affiliation(s)
- Xian-Rong Yu
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Shu-Ting Huang
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Ning Xu
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Wang-Sheng Dai
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Zeng-Chun Wang
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Fuzhou, China
| | - Hua Cao
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China
| | - Qiang Chen
- Department of Cardiac Surgery, Fujian Maternity and Child Health Hospital, Affiliated Hospital of Fujian Medical University, Fuzhou, China.,Fujian Key Laboratory of Women and Children's Critical Diseases Research, Fujian Maternity and Child Health Hospital, Fuzhou, China.,Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Fuzhou, China
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Molecular Detection of Drug-Resistance Genes of blaOXA-23-blaOXA-51 and mcr-1 in Clinical Isolates of Pseudomonas aeruginosa. Microorganisms 2021; 9:microorganisms9040786. [PMID: 33918745 PMCID: PMC8069495 DOI: 10.3390/microorganisms9040786] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 04/01/2021] [Accepted: 04/05/2021] [Indexed: 02/06/2023] Open
Abstract
Pseudomonas aeruginosa has caused high rates of mortality due to the appearance of strains with multidrug resistance (MDR) profiles. This study aimed to characterize the molecular profile of virulence and resistance genes in 99 isolates of P. aeruginosa recovered from different clinical specimens. The isolates were identified by the automated method Vitek2, and the antibiotic susceptibility profile was determined using different classes of antimicrobials. The genomic DNA was extracted and amplified by multiplex polymerase chain reaction (mPCR) to detect different virulence and antimicrobial resistance genes. Molecular typing was performed using the enterobacterial repetitive intergenic consensus (ERIC-PCR) technique to determine the clonal relationship among P. aeruginosa isolates. The drug susceptibility profiles of P. aeruginosa for all strains showed high levels of drug resistance, particularly, 27 (27.3%) isolates that exhibited extensively drug-resistant (XDR) profiles, and the other isolates showed MDR profiles. We detected the polymyxin E (mcr-1) gene in one strain that showed resistance against colistin. The genes that confer resistance to oxacillin (blaOXA-23 and blaOXA-51) were present in three isolates. One of these isolates carried both genes. As far as we know from the literature, this is the first report of the presence of blaOXA-23 and blaOXA-51 genes in P. aeruginosa.
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Liu B, Liu L. Molecular Epidemiology and Mechanisms of Carbapenem-Resistant Acinetobacter baumannii Isolates from ICU and Respiratory Department Patients of a Chinese University Hospital. Infect Drug Resist 2021; 14:743-755. [PMID: 33658811 PMCID: PMC7920613 DOI: 10.2147/idr.s299540] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 02/06/2021] [Indexed: 11/23/2022] Open
Abstract
Background The objective of our study is to estimate the differences in molecular epidemiology and resistance mechanisms in carbapenem-resistant Acinetobacter baumannii (CRAB) isolates from the ICU and respiratory department(RD) in Fourth Affiliated Hospital of Harbin Medical University. Methods Carbapenemase genes associated with carbapenem resistance were studied by polymerase chain reaction(PCR). Genotyping was analyzed using multi-locus sequence typing (MLST) and pulsed field gel electrophoresis (PFGE). Results Sixty non-duplicate CRAB isolates from the ICU and RD (n=30, respectively) were collected. All of CRAB strains were not resistant to colistin (0%). The CRAB strains from the ICU were significantly more resistant to tigecycline and cefoperazone/sulbactam compared with the RD (23.3% vs 0%, P=0.03; 53.3% % vs 23.3%, P=0.01, respectively). PCR detection of genes associated with CRAB revealed that the ratio in both the ICU and the RD of blaVIM-2, blaIMP-4, blaNDM-1, blaOXA-23, ampC, and mutation of CarO were present in 23.3% vs 0% (P=0.01), 40% vs 10% (P=0.02), 20% vs 0% (P=0.02), 80% vs 56.7%, 16.7% vs 13.3% and 86.7% vs 60% (P=0.04), respectively. Seven genotypes were detected by the PFGE in the RD and the ICU, respectively. Genotype I was significantly more frequent in the ICU compared with the RD (63.3% vs 36.6%, P=0.03). MLST showed that there were 10 ST genotypes in the RD and four in the ICU, but ST92 in both groups was 33.3% vs 63.3% (P=0.03), respectively. Conclusion There are differences in molecular epidemiology and resistance mechanisms in the CRAB isolates between the ICU and RD.
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Affiliation(s)
- Bin Liu
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
| | - Lei Liu
- Department of Respiratory Medicine, The Fourth Affiliated Hospital of Harbin Medical University, Harbin, People's Republic of China
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10
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Wang P, Li RQ, Wang L, Yang WT, Zou QH, Xiao D. Proteomic Analyses of Acinetobacter baumannii Clinical Isolates to Identify Drug Resistant Mechanism. Front Cell Infect Microbiol 2021; 11:625430. [PMID: 33718272 PMCID: PMC7943614 DOI: 10.3389/fcimb.2021.625430] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/11/2021] [Indexed: 12/25/2022] Open
Abstract
Acinetobacter baumannii is one of the main causes of nosocomial infections. Increasing numbers of multidrug-resistant Acinetobacter baumannii cases have been reported in recent years, but its antibiotic resistance mechanism remains unclear. We studied 9 multidrug-resistant (MDR) and 10 drug-susceptible Acinetobacter baumannii clinical isolates using Label free, TMT labeling approach and glycoproteomics analysis to identify proteins related to drug resistance. Our results showed that 164 proteins exhibited different expressions between MDR and drug-susceptible isolates. These differential proteins can be classified into six groups: a. proteins related to antibiotic resistance, b. membrane proteins, membrane transporters and proteins related to membrane formation, c. Stress response-related proteins, d. proteins related to gene expression and protein translation, e. metabolism-related proteins, f. proteins with unknown function or other functions containing biofilm formation and virulence. In addition, we verified seven proteins at the transcription level in eight clinical isolates by using quantitative RT-PCR. Results showed that four of the selected proteins have positive correlations with the protein level. This study provided an insight into the mechanism of antibiotic resistance of multidrug-resistant Acinetobacter baumannii.
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Affiliation(s)
- Ping Wang
- Department of Microbiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Ren-Qing Li
- Institute for Control of Infectious Diseases and Endemic Diseases, Beijing Center for Disease Prevention and Control, Beijing, China
| | - Lei Wang
- State Key Laboratory of Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Wen-Tao Yang
- State Key Laboratory of Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Qing-Hua Zou
- Department of Microbiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, China
| | - Di Xiao
- State Key Laboratory of Infectious Disease Prevention and Control, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, National Institute for Communicable Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing, China
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11
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Origanum vulgare essential oil: antibacterial activities and synergistic effect with polymyxin B against multidrug-resistant Acinetobacter baumannii. Mol Biol Rep 2020; 47:9615-9625. [PMID: 33190200 DOI: 10.1007/s11033-020-05989-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Accepted: 11/06/2020] [Indexed: 01/01/2023]
Abstract
Antimicrobial resistance is increasing around the world and the search for effective treatment options, such as new antibiotics and combination therapy is urgently needed. The present study evaluates oregano essential oil (OEO) antibacterial activities against reference and multidrug-resistant clinical isolates of Acinetobacter baumannii (Ab-MDR). Additionally, the combination of the OEO and polymyxin B was evaluated against Ab-MDR. Ten clinical isolates were characterized at the species level through multiplex polymerase chain reaction (PCR) for the gyrB and blaOXA-51-like genes. The isolates were resistant to at least four different classes of antimicrobial agents, namely, aminoglycosides, cephems, carbapenems, and fluoroquinolones. All isolates were metallo-β-lactamase (MβL) and carbapenemase producers. The major component of OEO was found to be carvacrol (71.0%) followed by β-caryophyllene (4.0%), γ-terpinene (4.5%), p-cymene (3,5%), and thymol (3.0%). OEO showed antibacterial effect against all Ab-MDR tested, with minimum inhibitory concentrations (MIC) ranging from 1.75 to 3.50 mg mL-1. Flow cytometry demonstrated that the OEO causes destabilization and rupture of the bacterial cell membrane resulting in apoptosis of A. baumannii cells (p < 0.05). Synergic interaction between OEO and polymyxin B (FICI: 0.18 to 0.37) was observed, using a checkerboard assay. When combined, OEO presented until 16-fold reduction of the polymyxin B MIC. The results presented here indicate that the OEO used alone or in combination with polymyxin B in the treatment of Ab-MDR infections is promising. To the best of our knowledge, this is the first report of OEO and polymyxin B association against Ab-MDR clinical isolates.
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Wang X, Du Z, Huang W, Zhang X, Zhou Y. Outbreak of Multidrug-Resistant Acinetobacter baumannii ST208 Producing OXA-23-Like Carbapenemase in a Children's Hospital in Shanghai, China. Microb Drug Resist 2020; 27:816-822. [PMID: 33185494 DOI: 10.1089/mdr.2019.0232] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Aims: Acinetobacter baumannii is notorious for acquiring antibiotic resistance and causing nosocomial infections worldwide. This study aimed to investigate the prevalence and molecular characteristics of A. baumannii isolates obtained from inpatients and the intensive care unit (ICU) environment of a pediatric hospital in Shanghai, China. Methods: Between July 2017 and January 2018, a total of 88 A. baumannii isolates, including three obtained from ICU environmental specimens, were characterized by antibiotic susceptibility, multilocus sequence typing, and resistance genes. Results: Carbapenem-resistant A. baumannii (CRAB) isolates, which were resistant to all the antibiotics tested except colistin, accounted for 69.3% (61/88) of all isolates. Three sequence types (STs) were identified among the CRAB isolates, and the predominant clone was ST208 (93.4%, 57/61), which included three environmental isolates and 54 clinical isolates collected from ICU patients. Carbapenem-susceptible isolates, none of which was multidrug resistant (MDR), showed a more diverse genetic background with three known STs and 21 novel STs identified. Intrinsic blaOXA-51-like and blaAmpC were detected in all isolates, while blaOXA-23-like was only detected in all CRAB isolates. ISAba1-blaOXA-23-like, ISAba1-blaOXA-51-like, and ISAba1-blaAmpC were identified in 69.3% (all CRAB isolates), 0%, and 65.9% (58 CRAB isolates) of all isolates, respectively. Conclusions: A nosocomial outbreak of MDR A. baumannii ST208 producing OXA-23-like carbapenemase occurred, highlighting the necessity for strict infection control interventions in the ICU.
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Affiliation(s)
- Xing Wang
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - Zhuoying Du
- Department of Neurosurgery, Huashan Hospital, Shanghai Medical College, Fudan University, Shanghai, P.R. China.,Neurosurgical Institute of Fudan University.,Shanghai Clinical Medical Center of Neurosurgery.,Shanghai Key Laboratory of Brain Function and Restoration and Neural Regeneration
| | - Weichun Huang
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - Xingyu Zhang
- Department of Laboratory Medicine, Shanghai Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, P.R. China
| | - Yun Zhou
- Department of Critical Care Medicine, Huashan Hospital, Fudan University, Shanghai, P.R. China
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Montaña S, Vilacoba E, Fernandez JS, Traglia GM, Sucari A, Pennini M, Iriarte A, Centron D, Melano RG, Ramírez MS. Genomic analysis of two Acinetobacter baumannii strains belonging to two different sequence types (ST172 and ST25). J Glob Antimicrob Resist 2020; 23:154-161. [PMID: 32966912 DOI: 10.1016/j.jgar.2020.09.006] [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: 04/30/2020] [Revised: 08/27/2020] [Accepted: 09/04/2020] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVES Acinetobacter baumannii is an opportunistic nosocomial pathogen that is the main focus of attention in clinical settings owing to its intrinsic ability to persist in the hospital environment and its capacity to acquire determinants of resistance and virulence. Here we present the genomic sequencing, molecular characterisation and genomic comparison of two A. baumannii strains belonging to two different sequence types (STs), one sporadic and one widely distributed in our region. METHODS Whole-genome sequencing (WGS) of Ab42 and Ab376 was performed using Illumina MiSeq-I and the genomes were assembled with SPAdes. ARG-ANNOT, CARD-RGI, ISfinder, PHAST, PlasmidFinder, plasmidSPAdes and IslandViewer were used to analyse both genomes. RESULTS Genome analysis revealed that Ab42 belongs to ST172, an uncommon ST, whilst Ab376 belongs to ST25, a widely distributed ST. Molecular characterisation showed the presence of two antibiotic resistance genes in Ab42 and nine in Ab376. No insertion sequences were detected in Ab42, however 22 were detected in Ab376. Moreover, two prophages were found in Ab42 and three in Ab376. In addition, a CRISPR-cas type I-Fb and two plasmids, one of which harboured an AbGRI1-like island, were found in Ab376. CONCLUSIONS We present WGS analysis of twoA. baumannii strains belonging to two different STs. These findings allowed us to characterise a previously undescribed ST (ST172) and provide new insights to the widely studied ST25.
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Affiliation(s)
- Sabrina Montaña
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM, UBA-CONICET), Buenos Aires, Argentina; Laboratorio de Bacteriología Clínica, Departamento de Bioquímica Clínica, Hospital de Clínicas José de San Martín, Facultad de Farmacia y Bioquímica, Buenos Aires, Argentina
| | - Elisabet Vilacoba
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM, UBA-CONICET), Buenos Aires, Argentina
| | - Jennifer S Fernandez
- Department of Biological Science, California State University Fullerton, 800 N. State College Blvd, Fullerton, CA 92834-6850, USA
| | - German M Traglia
- Departamento de Desarrollo Biotecnológico, Instituto de Higiene, Facultad de Medicina, Universidad de la República. Montevideo, Uruguay
| | - Adriana Sucari
- Unidad Microbiología, Laboratorio Stamboulian, Buenos Aires, Argentina
| | - Magdalena Pennini
- Unidad Microbiología, Laboratorio Stamboulian, Buenos Aires, Argentina
| | - Andres Iriarte
- Departamento de Desarrollo Biotecnológico, Instituto de Higiene, Facultad de Medicina, Universidad de la República. Montevideo, Uruguay
| | - Daniela Centron
- Instituto de Investigaciones en Microbiología y Parasitología Médica (IMPaM, UBA-CONICET), Buenos Aires, Argentina
| | | | - María Soledad Ramírez
- Department of Biological Science, California State University Fullerton, 800 N. State College Blvd, Fullerton, CA 92834-6850, USA.
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Abbasi E, Goudarzi H, Hashemi A, Chirani AS, Ardebili A, Goudarzi M, Sharahi JY, Davoudabadi S, Talebi G, Bostanghadiri N. Decreased carO gene expression and OXA-type carbapenemases among extensively drug-resistant Acinetobacter baumannii strains isolated from burn patients in Tehran, Iran. Acta Microbiol Immunol Hung 2020; 68:48-54. [PMID: 32365048 DOI: 10.1556/030.2020.01138] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/04/2019] [Indexed: 01/18/2023]
Abstract
A major challenge in the treatment of infections has been the rise of extensively drug resistance (XDR) and multidrug resistance (MDR) in Acinetobacter baumannii. The goals of this study were to determine the pattern of antimicrobial susceptibility, blaOXA and carO genes among burn-isolated A. baumannii strains. In this study, 100 A. baumannii strains were isolated from burn patients and their susceptibilities to different antibiotics were determined using disc diffusion testing and broth microdilution. Presence of carO gene and OXA-type carbapenemase genes was tested by PCR and sequencing. SDS-PAGE was done to survey CarO porin and the expression level of carO gene was evaluated by Real-Time PCR. A high rate of resistance to meropenem (98%), imipenem (98%) and doripenem (98%) was detected. All tested A. baumannii strains were susceptible to colistin. The results indicated that 84.9% were XDR and 97.9% of strains were MDR. In addition, all strains bore blaOXA-51 like and blaOXA-23 like and carO genes. Nonetheless, blaOXA-58 like and blaOXA-24 like genes were harbored by 0 percent and 76 percent of strains, respectively. The relative expression levels of the carO gene ranged from 0.06 to 35.01 fold lower than that of carbapenem-susceptible A. baumannii ATCC19606 and SDS - PAGE analysis of the outer membrane protein showed that all 100 isolates produced CarO. The results of current study revealed prevalence of blaOXA genes and changes in carO gene expression in carbapenem resistant A.baumannii.
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Affiliation(s)
- Elham Abbasi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Hossein Goudarzi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Ali Hashemi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Alireza Salimi Chirani
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Abdollah Ardebili
- 2Infectious Diseases Research Center, Golestan University of Medical Sciences, Gorgan, Islamic Republic of Iran
- 3Department of Microbiology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Islamic Republic of Iran
| | - Mehdi Goudarzi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Javad Yasbolaghi Sharahi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Sara Davoudabadi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Ghazaleh Talebi
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
| | - Narjes Bostanghadiri
- 1Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Islamic Republic of Iran
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Tehrani S, Saffarfar V, Hashemi A, Abolghasemi S. A Survey of Genotype and Resistance Patterns of Ventilator-Associated Pneumonia Organisms in ICU Patients. TANAFFOS 2019; 18:215-222. [PMID: 32411261 PMCID: PMC7210578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Ventilator-Associated Pneumonia (VAP) occurs in hospitalized patients who have undergone intubation and mechanical ventilation for more than 48 hours. Patients referred to the Intensive Care Unit (ICU) are also affected by VAP due to specific conditions, especially by Gram-negative pathogens with advanced drug resistance. In this study, the pattern of antibiotic resistance of gram negative bacteria isolated from tracheal culture of VAP patients was investigated in ICU. MATERIALS AND METHODS In this cross-sectional study, tracheal samples were collected from VAP patients admitted in the hospital's ICU from March 2017-February 2018. After isolation, bacterial isolates were identified using biochemical tests. Then, antimicrobial resistance pattern of these isolates was investigated using standard disc diffusion and E-test methods. Multiplex PCR were used to detect the blaOXA-23-like, blaOXA-51-like, blaOXA-24-like, and blaOXA-58-like genes among Acinetobacter baumannii (A. baumannii) isolates. RESULTS A total of 29 bacterial isolates were isolated from ICU patients, which were A. baumannii, Pseudomonas aeruginosa (P. aeruginosa), Klebsiella pneumoniae (K. pneumoniae) and candida spp, with prevalence of 38, 27.5, 13.8, and 20.7%, respectively. Antibiotic susceptibility test of isolates indicated that almost all isolates showed Multi-Drug Resistance (MDR) pattern. The A. baumannii isolates were resistant to ciprofloxacin and piperacillin-tazobactam, but ampicillin-sulbactam and colistin had better results. Ciprofloxacin, meropenem and colistin were effective against P. aeruginosa isolates, but other antibiotics were less effective and Colistin, Levofloxacin (LVX) and Piperacilin/Tazobactam were the best antibiotics that were effective on the isolates of K. pneumonia. CONCLUSION According to the present study, high resistance to most antibiotics in gram negative bacilli showed that antibiotic therapy should be based on the type of bacteria isolated by tracheal culture and, as far as possible, combination therapies should be used to maximize the coverage of other possible pathogens, and antibiotic resistance in ICU.
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Affiliation(s)
- Shabnam Tehrani
- Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Vida Saffarfar
- Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Hashemi
- Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Abolghasemi
- Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran,,Correspondence to: Abolghasemi S, Address: Infectious Diseases and Tropical Medicine Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran Email address:
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16
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What's new in the treatment of multidrug-resistant gram-negative infections? Diagn Microbiol Infect Dis 2018; 93:171-181. [PMID: 30224228 DOI: 10.1016/j.diagmicrobio.2018.08.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 07/31/2018] [Accepted: 08/19/2018] [Indexed: 12/19/2022]
Abstract
Eradicating multi-drug resistant (MDR) organisms has been a major challenge in healthcare settings worldwide. Newly approved drugs and those currently in the pipeline may have a promising solution to this issue. The purposes of this review are to describe the various resistance mechanisms of Gram-negative bacteria and to provide a summary of the current literature available on the newer agents, such as ceftazidime/avibactam, ceftolozane/tazobactam, meropenem/vaborbactam, and other emerging agents used for the treatment of MDR Gram-negative infections. Given that MDR organisms confer resistance to treatment by various methods, including enzymatic degradation, efflux pumps, and porin mutation, an understanding of mechanisms of bacterial resistance combined with information on newer antimicrobial agents against MDR Gram-negative bacteria will further assist clinicians in determining the best suitable therapy for the treatment of various complicated infections.
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Lee SY, Oh MH, Yun SH, Choi CW, Park EC, Song HS, Lee H, Yi YS, Shin J, Chung C, Moon JY, Lee JC, Kim GH, Kim SI. Genomic characterization of extensively drug-resistant Acinetobacter baumannii strain, KAB03 belonging to ST451 from Korea. INFECTION GENETICS AND EVOLUTION 2018; 65:150-158. [PMID: 30053642 DOI: 10.1016/j.meegid.2018.07.030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 07/06/2018] [Accepted: 07/23/2018] [Indexed: 12/23/2022]
Abstract
Extensively drug-resistant (XDR) Acinetobacter baumannii strains have emerged rapidly worldwide. The antibiotic resistance characteristics of XDR A. baumannii strains show regional differences; therefore, it is necessary to analyze both genomic and proteomic characteristics of emerging XDR A. baumannii clinical strains isolated in Korea to elucidate their multidrug resistance. Here, we isolated new sequence type of XDR A. baumannii clinical strain (KAB03) from Korean hospitals and performed comprehensive genome analyses. The strain belongs to new sequence type, ST451. Single nucleotide polymorphism (SNP) analysis with other types of A. baumannii strains revealed that KAB03 has unique SNP pattern in the regions of gyrB and gpi of MLST profiles. A. baumannii KAB03 harbours three antibiotic resistance islands (AbGRI1, 2, and 3). AbGRI1 harbours two copies of Tn2006 containing blaOXA-23, which play an important role in antibiotic resistance. AbGRI2 possesses aminoglycoside resistant gene aph(3')-Ic and class A β-lactamase blaTEM. AbGIR3 has macrolide resistant genes and aminoglycoside resistant gene armA. A. baumannii KAB03 harbours mutations in pmrB and pmrC, which are believed to confer colistin resistance. In addition, proteomic and transcriptional analysis of KAB03 confirmed that β-lactamases (ADC-73 and OXA-23), Ade efflux pumps (AdeIJK), outer membrane proteins (OmpA and OmpW), and colistin resistance genes (PmrCAB) were major proteins responsible for antibiotic resistance. Our proteogenomic results provide valuable information for multi-drug resistance in emerging XDR A. baumannii strains belonging to ST451.
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Affiliation(s)
- Sang-Yeop Lee
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Man Hwan Oh
- Department of Nanobiomedical Science, Dankook University, Cheonan 330-714, Republic of Korea
| | - Sung Ho Yun
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea
| | - Chi-Won Choi
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; KBNP Technology Institute, KBNP, INC., Anyang 14059, Republic of Korea
| | - Edmond Changkyun Park
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Hyun Seok Song
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea
| | - Hayoung Lee
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea
| | - Yoon-Sun Yi
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea
| | - Juhyun Shin
- Department of Urology, School of Medicine, Chungnam National University Hospital, Daejeon 35015, Republic of Korea
| | - Chaeuk Chung
- Department of Pulmonary and Critical Care Medicine, Chungnam National University Hospital, Daejeon 35015, Republic of Korea
| | - Jae Young Moon
- Department of Pulmonary and Critical Care Medicine, Chungnam National University Hospital, Daejeon 35015, Republic of Korea
| | - Je Chul Lee
- Department of Microbiology, School of Medicine, Kyungpook National University, Daegu 700-422, Republic of Korea
| | - Gun-Hwa Kim
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
| | - Seung Il Kim
- Drug & Disease Target Team, Korea Basic Science Institute, Ochang 28119, Republic of Korea; Center for Convergent Research of Emerging Virus Infection, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea; Department of Bio-Analytical Science, University of Science and Technology (UST), Daejeon 34113, Republic of Korea.
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Rosales-Reyes R, Gayosso-Vázquez C, Fernández-Vázquez JL, Jarillo-Quijada MD, Rivera-Benítez C, Santos-Preciado JI, Alcántar-Curiel MD. Virulence profiles and innate immune responses against highly lethal, multidrug-resistant nosocomial isolates of Acinetobacter baumannii from a tertiary care hospital in Mexico. PLoS One 2017; 12:e0182899. [PMID: 28797068 PMCID: PMC5552319 DOI: 10.1371/journal.pone.0182899] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Accepted: 07/26/2017] [Indexed: 11/18/2022] Open
Abstract
Virulence profiles and innate immune responses were studied in Acinetobacter baumannii from nosocomial infections collected over one year in a tertiary care hospital in Mexico. A. baumannii were identified by VITEK 2 System followed by susceptibility tests. Carbapenemase genes, active efflux mechanism to imipenem and meropenem and outer membrane proteins profile were analyzed to evaluate their role on the activity of carbapenem resistance. All isolates were genotyped by pulsed field gel electrophoresis. The ability to form biofilm was determined on a polystyrene surface. The resistance to complement was determined with a pooled human normal serum and TNFα release by infected macrophages was determined by ELISA. The 112 isolates from this study were associated with a 52% of mortality. All were resistance to β-lactams, fluoroquinolones, and trimethroprim-sulfamethoxal, 96 and 90% were resistant to meropenem and imipenem, respectively, but with high susceptibility to polymyxin B, colistin and tigecyclin. Isolates were classified in 11 different clones. Most isolates, 88% (99/112), were metallo-β-lactamases and carbapenemases producers, associated in 95% with the presence of blaOXA-72 gene. Only 4/99 and 1/99 of the carbapenem-resistant isolates were related to efflux mechanism to meropenem or imipenem resistance, respectively. The loss of expression of 22, 29, and/or 33-36-kDa proteins was detected in 8/11 of the clinical isolates with resistance to carbapenem. More than 96% (108/112) of the isolates were high producers of biofilms on biotic surfaces. Finally, all isolates showed variable resistance to normal human serum activity and were high inductors of TNFα release by macrophages. In summary, these results suggest that multidrug-resistant A. baumannii can persist in the hospital environment through its ability to form biofilms. The high mortality observed was due to their ability to survive normal human serum activity and capability to induce potent inflammatory immune response making this nosocomial pathogen a serious threat to hospitalized patients.
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Affiliation(s)
- Roberto Rosales-Reyes
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
- * E-mail: (MDAC); (RRR)
| | - Catalina Gayosso-Vázquez
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
| | - José Luis Fernández-Vázquez
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
| | - Ma Dolores Jarillo-Quijada
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
| | | | - José Ignacio Santos-Preciado
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
| | - María Dolores Alcántar-Curiel
- Unidad de Investigación en Medicina Experimental, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
- * E-mail: (MDAC); (RRR)
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