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Zhang S, Hussain S, Tang Y, Wang K, Wang X, Zhang L, Liao Y, Wang C, Hao Y, Gao R. Enzyme-triggered on-demand release of a H 2O 2-self-supplying CuO 2@Fe 3O 4 nanoagent for enhanced chemodyamic antimicrobial therapy and wound healing. J Mater Chem B 2024; 12:3404-3416. [PMID: 38487992 DOI: 10.1039/d3tb02762g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Nanoagents for chemodynamic therapy (CDT) hold a promising future in the field of antimicrobials, especially copper peroxide (CuO2) (CP) nanomaterials which have garnered significant attention due to their ability to self-supply H2O2. Nevertheless, the poor stability of CuO2 remains a critical challenge which restricts its practical application in the antibacterial field. In this study, an advanced nano-antimicrobial system HA-CP@Fe3O4 with enzyme-responsive properties is developed by coating hyaluronic acid (HA) on CuO2-loaded iron tetraoxide nanoparticles. The coating of HA not only stabilizes the CuO2 nanomaterials but also provides responsiveness towards the enzyme hyaluronidase, which is typically secreted by some bacteria. The outer layer of HA in HA-CP@Fe3O4 undergoes decomposition in the presence of hyaluronidase-secreting bacteria, resulting in the release of CuO2@Fe3O4. The released CuO2@Fe3O4 then self-supplies H2O2 and generates reactive oxygen species (ROS) within the infected microenvironment through Fenton and Russell effects, to ultimately achieve effective and precise antimicrobial activity. Simultaneously, the magnetic property provided by Fe3O4 allows the substance to be directed towards the infection site. Both in vitro and in vivo tests demonstrated that HA-CP@Fe3O4 exhibited excellent antimicrobial capabilities at low concentration (30 μg mL-1), exceptional biocompatibility and the ability to accelerate wound healing. The findings of this work offer a new and promising approach for targeted and precise CDT.
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Affiliation(s)
- Sijie Zhang
- School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Sameer Hussain
- School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Yuhai Tang
- School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Kaili Wang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Xingyan Wang
- School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
| | - Long Zhang
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Yuheng Liao
- Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Chen Wang
- Health Science Center, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Yi Hao
- School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
- School of Pharmacy, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, China
| | - Ruixia Gao
- School of Chemistry, Xi'an Jiaotong University, Xi'an, Shaanxi 710049, China.
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2
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Mokni-Tlili S, Hechmi S, Ouzari HI, Mechergui N, Ghorbel M, Jedidi N, Hassen A, Hamdi H. Co-occurrence of antibiotic and metal resistance in long-term sewage sludge-amended soils: influence of application rates and pedo-climatic conditions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:26596-26612. [PMID: 36369449 PMCID: PMC9652132 DOI: 10.1007/s11356-022-23802-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Urban sewage sludge (USS) is increasingly being used as an alternative organic amendment in agriculture. Because USS originates mostly from human excreta, partially metabolized pharmaceuticals have also been considered in risk assessment studies after reuse. In this regard, we investigated the cumulative effect of five annual USS applications on the spread of antibiotic-resistant bacteria (ARB) and their subsequent resistance to toxic metals in two unvegetated soils. Eventually, USS contained bacterial strains resistant to all addressed antibiotics with indices of resistance varying between 0.25 for gentamicin to 38% for ampicillin and azithromycin. Sludge-amended soils showed also the emergence of resistome for all tested antibiotics compared to non-treated controls. In this regard, the increase of sludge dose generally correlated with ARB counts, while soil texture had no influence. On the other hand, the multi-antibiotic resistance (MAR) of 52 isolates selected from USS and different soil treatments was investigated for 10 most prescribed antibiotics. Nine isolates showed significant MAR index (≥ 0.3) and co-resistance to Cd, As and Be as well. However, events including an extreme flash flood and the termination of USS applications significantly disrupted ARB communities in all soil treatments. In any case, this study highlighted the risks of ARB spread in sludge-amended soils and a greater concern with the recent exacerbation of antibiotic overuse following COVID-19 outbreak.
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Affiliation(s)
- Sonia Mokni-Tlili
- Water Research and Technology Center, University of Carthage, P.O. Box 273, 8020, Soliman, Tunisia
| | - Sarra Hechmi
- Water Research and Technology Center, University of Carthage, P.O. Box 273, 8020, Soliman, Tunisia
| | - Hadda-Imene Ouzari
- Laboratory of Microorganisms and Active Biomolecules, Faculty of Sciences of Tunis, University of Tunis El Manar, LR03ES03, Tunis, Tunisia
| | - Najet Mechergui
- Water Research and Technology Center, University of Carthage, P.O. Box 273, 8020, Soliman, Tunisia
| | - Manel Ghorbel
- Water Research and Technology Center, University of Carthage, P.O. Box 273, 8020, Soliman, Tunisia
| | - Naceur Jedidi
- Water Research and Technology Center, University of Carthage, P.O. Box 273, 8020, Soliman, Tunisia
| | - Abdennaceur Hassen
- Water Research and Technology Center, University of Carthage, P.O. Box 273, 8020, Soliman, Tunisia
| | - Helmi Hamdi
- Food and Water Security Program, Center for Sustainable Development, College of Arts and Sciences, Qatar University, P.O. Box 2713, Doha, Qatar.
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3
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Recent Studies on Advance Spectroscopic Techniques for the Identification of Microorganisms: A Review. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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4
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El-Khoury C, Mansour E, Yuliandra Y, Lai F, Hawkins BA, Du JJ, Sundberg EJ, Sluis-Cremer N, Hibbs DE, Groundwater PW. The role of adjuvants in overcoming antibacterial resistance due to enzymatic drug modification. RSC Med Chem 2022; 13:1276-1299. [PMID: 36439977 PMCID: PMC9667779 DOI: 10.1039/d2md00263a] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 09/16/2022] [Indexed: 02/03/2023] Open
Abstract
Antibacterial resistance is a prominent issue with monotherapy often leading to treatment failure in serious infections. Many mechanisms can lead to antibacterial resistance including deactivation of antibacterial agents by bacterial enzymes. Enzymatic drug modification confers resistance to β-lactams, aminoglycosides, chloramphenicol, macrolides, isoniazid, rifamycins, fosfomycin and lincosamides. Novel enzyme inhibitor adjuvants have been developed in an attempt to overcome resistance to these agents, only a few of which have so far reached the market. This review discusses the different enzymatic processes that lead to deactivation of antibacterial agents and provides an update on the current and potential enzyme inhibitors that may restore bacterial susceptibility.
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Affiliation(s)
- Christy El-Khoury
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
| | - Elissar Mansour
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
| | - Yori Yuliandra
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
| | - Felcia Lai
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
| | - Bryson A Hawkins
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
| | - Jonathan J Du
- Department of Biochemistry, Emory University School of Medicine Atlanta GA 30322 USA
| | - Eric J Sundberg
- Department of Biochemistry, Emory University School of Medicine Atlanta GA 30322 USA
| | - Nicolas Sluis-Cremer
- Division of Infectious Diseases, Department of Medicine, University of Pittsburgh School of Medicine Pittsburgh PA 15213 USA
| | - David E Hibbs
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
| | - Paul W Groundwater
- Sydney Pharmacy School, Faculty of Medicine and Health, The University of Sydney Sydney NSW 2006 Australia
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5
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Li Y, Miao Y, Yang L, Zhao Y, Wu K, Lu Z, Hu Z, Guo J. Recent Advances in the Development and Antimicrobial Applications of Metal-Phenolic Networks. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202684. [PMID: 35876402 PMCID: PMC9507365 DOI: 10.1002/advs.202202684] [Citation(s) in RCA: 52] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 06/23/2022] [Indexed: 05/04/2023]
Abstract
Due to the abuse of antibiotics and the emergence of multidrug resistant microorganisms, medical devices, and related biomaterials are at high risk of microbial infection during use, placing a heavy burden on patients and healthcare systems. Metal-phenolic networks (MPNs), an emerging organic-inorganic hybrid network system developed gradually in recent years, have exhibited excellent multifunctional properties such as anti-inflammatory, antioxidant, and antibacterial properties by making use of the coordination between phenolic ligands and metal ions. Further, MPNs have received widespread attention in antimicrobial infections due to their facile synthesis process, excellent biocompatibility, and excellent antimicrobial properties brought about by polyphenols and metal ions. In this review, different categories of biomaterials based on MPNs (nanoparticles, coatings, capsules, hydrogels) and their fabrication strategies are summarized, and recent research advances in their antimicrobial applications in biomedical fields (e.g., skin repair, bone regeneration, medical devices, etc.) are highlighted.
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Affiliation(s)
- Yue Li
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
| | - Yong Miao
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
| | - Lunan Yang
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
| | - Yitao Zhao
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
| | - Keke Wu
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
| | - Zhihui Lu
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
- Regenerative Medicine and Tissue Repair Research CenterHuangpu Institute of MaterialsGuangzhou510530P. R. China
| | - Zhiqi Hu
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
| | - Jinshan Guo
- Department of Histology and EmbryologySchool of Basic Medical SciencesDepartment of Plastic and Aesthetic SurgeryNanfang Hospital of Southern Medical UniversitySouthern Medical UniversityGuangzhou510515P. R. China
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6
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Al-Shahrani M, Bryant G. Differential dynamic microscopy for the characterisation of motility in biological systems. Phys Chem Chem Phys 2022; 24:20616-20623. [PMID: 36048134 DOI: 10.1039/d2cp02034c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Differential Dynamic Microscopy (DDM) is a relatively new technique which measures the dynamics of suspended particles using a dynamic light scattering formalism. Videos are recorded using standard light microscopy at moderate frame rates, and fluctuations in pixel intensity are measured as a function of time. As only pixel intensity is analysed, it is not necessary to resolve individual particles. This allows for low magnifications and wide fields of view, and therefore dynamics can be measured on tens of thousands of scattering objects, providing robust statistics. A decade ago the technique was successfully applied to measure bacterial motility. Since then, it has been applied to a range of motile systems, but has not yet reached the wider biological community. This perspective reviews the work done so far, and provides the basic background to enable the broader application of this promising technique.
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Affiliation(s)
- Monerh Al-Shahrani
- Physics, School of Science, RMIT University, Melbourne, Australia. .,Department of Physics, College of Science, University of Bisha, Bisha, Saudi Arabia
| | - Gary Bryant
- Physics, School of Science, RMIT University, Melbourne, Australia.
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7
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Giedraitiene A, Pereckaite L, Bredelyte-Gruodiene E, Virgailis M, Ciapiene I, Tatarunas V. CTX-M-producing Escherichia coli strains: resistance to temocillin, fosfomycin, nitrofurantoin and biofilm formation. Future Microbiol 2022; 17:789-802. [PMID: 35549350 DOI: 10.2217/fmb-2021-0202] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Aim: ESBL-producing and bacterial biofilms-forming Escherichia coli are associated with antimicrobial treatment failure. This study aimed to investigate the phenotypic resistance mechanisms of CTX-M E. coli against old antibiotics - cell wall synthesis inhibitors temocillin, nitrofurantoin and fosfomycin. Materials & Methods: Susceptibility to old antibiotics testing was performed using disk diffusion method, biofilm formation was evaluated spectrophotometrically, and PCR was used for the determination of CTX-M type. Results & conclusion: Temocillin was active against nearly 93%, nitrofurantoin and fosfomycin, respectively, 91.7% and 98.6% of tested E. coli. Thus, it demonstrated to be a good alternative therapeutic option against ESBL infections. Bacteria resistant to old antibiotics had CTX-M-15 or CTX-M-15, TEM-1 and OXA-1 combinations. No significant association was found between CTX-M E. coli resistance to temocillin, nitrofurantoin and fosfomycin; however, the level of biofilm formation was found as not affected by the type of CTX-M β-lactamases.
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Affiliation(s)
- Agne Giedraitiene
- Institute of Microbiology & Virology, Lithuanian University of Health Sciences, Kaunas, LT-50162, Lithuania
| | - Laura Pereckaite
- Department of Laboratory Medicine, Lithuanian University of Health Sciences, Kaunas, LT-50161, Lithuania
| | | | - Marius Virgailis
- Institute of Microbiology & Virology, Lithuanian University of Health Sciences, Kaunas, LT-50162, Lithuania
| | - Ieva Ciapiene
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, LT-50161, Lithuania
| | - Vacis Tatarunas
- Institute of Cardiology, Lithuanian University of Health Sciences, Kaunas, LT-50161, Lithuania
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8
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Zhan J, Chen H, Zhou H, Hao L, Xu H, Zhou X. Essential oil-loaded chitosan/zinc (II) montmorillonite synergistic sustained-release system as antibacterial material. J DISPER SCI TECHNOL 2021. [DOI: 10.1080/01932691.2021.1947848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Jinghui Zhan
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
| | - Huayao Chen
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
| | - Hongjun Zhou
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
| | - Li Hao
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
| | - Hua Xu
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
- Innovative Institute for Plant Health, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
| | - Xinhua Zhou
- Key Laboratory of Agricultural Green Fine Chemicals of Guangdong Higher Education Institution, School of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, Guangdong, PR China
- Maoming Branch, Guangdong Laboratory for Lingnan Modern Agriculture
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9
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Kernéis S, Lucet JC, Santoro A, Meschiari M. Individual and collective impact of Klebsiella pneumoniae carbapenemase (KPC)-producing K. pneumoniae in patients admitted to the ICU. J Antimicrob Chemother 2021; 76:i19-i26. [PMID: 33534878 DOI: 10.1093/jac/dkaa494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
KPC-producing Klebsiella pneumoniae (KPC-Kp) raises major concerns in the context of intensive care, owing to limited treatment options and the ability to cause outbreaks in this specific setting. The objectives of this review are to give an overview of the burden of KPC-Kp in ICU patients and to discuss methodological issues and limitations regarding the quality of data available. Robust and reliable assessment of the KPC-Kp impact in the ICU should take into consideration not only characteristics of the individuals, but also of the health systems including length of stay, costs and hospital organization issues. Estimates of mortality reported in the current literature are weakened by the poor quality of adjustment for age-specific risks, co-morbidities, and appropriateness of therapy. All these confounding factors should be taken into account in models, with consideration of control groups and competing risks that is currently lacking in the published literature. Since development of antibiotic resistance is an unstoppable phenomenon and economic and human resources are facing progressive limitations due to budget constraints, cost-saving strategies targeted to avoid ICU closure, temporary limitation of admissions or delayed hospital discharge are necessary. The early identification of KPC-Kp-colonized patients through active screening strategies is likely to be the cornerstone of such a cost-saving strategy. However, there are still many open issues concerning which of these strategies are the most effective. Owing to extreme heterogeneity and several methodological flaws in current publications, future studies investigating the long-term sequelae and economic impact of KPC-Kp in the ICU are urgently needed.
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Affiliation(s)
- Solen Kernéis
- Université de Paris, INSERM, IAME, F-75018, Paris, France.,Equipe de Prévention du Risque Infectieux, APHP, Hôpital Bichat, F-75018, Paris, France
| | - Jean Christophe Lucet
- Université de Paris, INSERM, IAME, F-75018, Paris, France.,Equipe de Prévention du Risque Infectieux, APHP, Hôpital Bichat, F-75018, Paris, France
| | - Antonella Santoro
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria Policlinico of Modena, Modena, Italy
| | - Marianna Meschiari
- Department of Infectious Diseases, Azienda Ospedaliero-Universitaria Policlinico of Modena, Modena, Italy
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Kaprou GD, Bergšpica I, Alexa EA, Alvarez-Ordóñez A, Prieto M. Rapid Methods for Antimicrobial Resistance Diagnostics. Antibiotics (Basel) 2021; 10:209. [PMID: 33672677 PMCID: PMC7924329 DOI: 10.3390/antibiotics10020209] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 02/09/2021] [Accepted: 02/13/2021] [Indexed: 02/06/2023] Open
Abstract
Antimicrobial resistance (AMR) is one of the most challenging threats in public health; thus, there is a growing demand for methods and technologies that enable rapid antimicrobial susceptibility testing (AST). The conventional methods and technologies addressing AMR diagnostics and AST employed in clinical microbiology are tedious, with high turnaround times (TAT), and are usually expensive. As a result, empirical antimicrobial therapies are prescribed leading to AMR spread, which in turn causes higher mortality rates and increased healthcare costs. This review describes the developments in current cutting-edge methods and technologies, organized by key enabling research domains, towards fighting the looming AMR menace by employing recent advances in AMR diagnostic tools. First, we summarize the conventional methods addressing AMR detection, surveillance, and AST. Thereafter, we examine more recent non-conventional methods and the advancements in each field, including whole genome sequencing (WGS), matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) spectrometry, Fourier transform infrared (FTIR) spectroscopy, and microfluidics technology. Following, we provide examples of commercially available diagnostic platforms for AST. Finally, perspectives on the implementation of emerging concepts towards developing paradigm-changing technologies and methodologies for AMR diagnostics are discussed.
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Affiliation(s)
- Georgia D. Kaprou
- Department of Food Hygiene and Technology, University of León, 24071 León, Spain; (I.B.); (E.A.A.); (A.A.-O.); (M.P.)
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, L-4367 Belvaux, Luxembourg
| | - Ieva Bergšpica
- Department of Food Hygiene and Technology, University of León, 24071 León, Spain; (I.B.); (E.A.A.); (A.A.-O.); (M.P.)
- Institute of Food Safety, Animal Health and Environment BIOR, LV-1076 Riga, Latvia
| | - Elena A. Alexa
- Department of Food Hygiene and Technology, University of León, 24071 León, Spain; (I.B.); (E.A.A.); (A.A.-O.); (M.P.)
| | - Avelino Alvarez-Ordóñez
- Department of Food Hygiene and Technology, University of León, 24071 León, Spain; (I.B.); (E.A.A.); (A.A.-O.); (M.P.)
- Institute of Food Science and Technology, University of León, 24071 León, Spain
| | - Miguel Prieto
- Department of Food Hygiene and Technology, University of León, 24071 León, Spain; (I.B.); (E.A.A.); (A.A.-O.); (M.P.)
- Institute of Food Science and Technology, University of León, 24071 León, Spain
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11
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Leone M, Lakbar I, Baldovini A, Geeraerts T. Ventilator-associated pneumonia due to Staphylococcus aureus in brain-injured patients: Beyond risk factors. Anaesth Crit Care Pain Med 2021; 40:100825. [PMID: 33771329 DOI: 10.1016/j.accpm.2021.100825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Marc Leone
- Service d'anesthésie et de réanimation, hôpital Nord, Aix Marseille université, Assistance publique-Hôpitaux de Marseille, Marseille, France; MEPHI, IHU Méditerranée Infection, Aix Marseille université, Marseille, France.
| | - Ines Lakbar
- MEPHI, IHU Méditerranée Infection, Aix Marseille université, Marseille, France; Anaesthesiology and critical care department, university hospital of Toulouse, university Toulouse 3-Paul Sabatier, Toulouse, France
| | - Alice Baldovini
- Service d'anesthésie et de réanimation, hôpital Nord, Aix Marseille université, Assistance publique-Hôpitaux de Marseille, Marseille, France
| | - Thomas Geeraerts
- Anaesthesiology and critical care department, university hospital of Toulouse, university Toulouse 3-Paul Sabatier, Toulouse, France
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12
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Major discrepancy between factual antibiotic resistance and consumption in South of France: analysis of 539,037 bacterial strains. Sci Rep 2020; 10:18262. [PMID: 33106494 PMCID: PMC7588456 DOI: 10.1038/s41598-020-75158-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 04/21/2020] [Indexed: 12/12/2022] Open
Abstract
The burden of antibiotic resistance is currently estimated by mathematical modeling, without real count of resistance to key antibiotics. Here we report the real rate of resistance to key antibiotics in bacteria isolated from humans during a 5 years period in a large area in southeast in France. We conducted a retrospective study on antibiotic susceptibility of 539,107 clinical strains isolated from hospital and private laboratories in south of France area from January 2014 to January 2019. The resistance rate to key antibiotics as well as the proportion of bacteria classified as Difficult-to-Treat (DTR) were determined and compared with the Mann–Whitney U test, the χ2 test or the Fisher’s exact test. Among 539,037 isolates, we did not observe any significant increase or decrease in resistance to key antibiotics for 5 years, (oxacillin resistance in Staphylococcus aureus, carbapenem resistance in enterobacteria and Pseudomonas aeruginosa and 3rd generation cephalosporin resistance in Escherichia coli and Klebsiella pneumoniae). However, we observed a significant decrease in imipenem resistance for Acinetobacter baumannii from 2014 to 2018 (24.19–12.27%; p = 0.005) and a significant increase of ceftriaxone resistance in Klebsiella pneumoniae (9.9–24.03%; p = 0.001) and Enterobacter cloacae (24.05–42.05%; p = 0.004). Of these 539,037 isolates, 1604 (0.3%) had a DTR phenotype. Over a 5-year period, we did not observe a burden of AR in our region despite a high rate of antibiotic consumption in our country. These results highlight the need for implementation of real-time AR surveillance systems which use factual data.
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13
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Oyedele OA, Kuzamani KY, Adetunji MC, Osopale BA, Makinde OM, Onyebuenyi OE, Ogunmola OM, Mozea OC, Ayeni KI, Ezeokoli OT, Oyinloye AM, Ngoma L, Mwanza M, Ezekiel CN. Bacteriological assessment of tropical retail fresh-cut, ready-to-eat fruits in south-western Nigeria. SCIENTIFIC AFRICAN 2020. [DOI: 10.1016/j.sciaf.2020.e00505] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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14
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Inactivation of mgrB gene regulator and resistance to colistin is becoming endemic in carbapenem-resistant Klebsiella pneumoniae in Greece: A nationwide study from 2014 to 2017. Int J Antimicrob Agents 2020; 55:105930. [PMID: 32130981 DOI: 10.1016/j.ijantimicag.2020.105930] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 02/24/2020] [Indexed: 01/13/2023]
Abstract
INTRODUCTION In Greece, the spread of carbapenem-resistant Enterobacteriaceae in humans has led to the reintroduction of colistin as a therapeutic agent. Unfortunately, colistin resistance with different mechanisms has emerged. The present work aims to determine the prevalence of carbapenem and colistin resistance and the corresponding mechanisms in Klebsiella pneumoniae clinical isolates from Greece. METHODS From 2014 to 2017, 288 carbapenem-resistant K. pneumoniae clinical strains were gathered from a collection of 973 isolates from eight different hospitals in Greece. Antibiotic susceptibility testing was performed using three different methods. Screening of carbapenem and colistin resistance genes was conducted using polymerase chain reaction (PCR) amplification and sequencing. RESULTS Among the 288 (29.6 %) carbapenem-resistant isolates, 213 (73.9%) were colistin-resistant (minimum inhibitory concentration [MIC] >2 mg/L). The KPC type was the most common carbapenemase gene (116; 40.3%), followed by VIM (41; 14.2%), NDM (33; 11.5%) and OXA-48 (22; 7.6%). Moreover, 44 (15.3%) strains co-produced two types of carbapenemases. No mcr genes were detected for colistin resistance but mutations in chromosomal genes were found. These included inactivation of the mgrB gene for 148 (69.5%) strains, including insertion sequences for 94 (44.1%), nonsense mutations for 4 (1.9%) and missense mutations for 24 (11.3%). Moreover, PCR amplification of mgrB gene was negative for 26 (12.2%) strains. Finally, 65 (30.5%) colistin-resistant strains exhibited a wild-type mgrB, the mechanisms of which remain to be elucidated. CONCLUSION This study shows that K. pneumoniae clinical strains in Greece are resistant to both carbapenems and colistin and this is endemic and is likely chromosomally encoded.
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Mailhe M, Aubry C, Brouqui P, Michelet P, Raoult D, Parola P, Lagier JC. Complications of peripheral venous catheters: The need to propose an alternative route of administration. Int J Antimicrob Agents 2020; 55:105875. [PMID: 31926285 DOI: 10.1016/j.ijantimicag.2020.105875] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 12/16/2019] [Accepted: 12/28/2019] [Indexed: 12/19/2022]
Abstract
Use of peripheral venous catheters (PVCs) is very common in hospitals. According to the literature, after a visit to the emergency department >75% of hospitalised patients carry a PVC, among which almost 50% are useless. In this study, the presence and complications of PVCs in an infectious diseases (ID) unit of a French tertiary-care university hospital were monitored. A total of 614 patients were prospectively included over a 6-month period. Among the 614 patients, 509 (82.9%) arrived in the ID unit with a PVC, of which 260 (51.1%) were judged unnecessary and were removed as soon as the patients were examined by the ID team. More than one-half of PVCs were removed within 24 h in the unit (308/509; 60.5%). PVCs were complicated for 65 (12.8%) of the 509 patients, with complications including extravasation, cutaneous necrosis, lymphangitis, phlebitis, tearing off the patient, superficial venous thrombosis and arthritis. We must therefore continue to search for unjustified PVC insertion. Alternatives to the intravenous administration route must be proposed, such as subcutaneous infusion or oral antibiotic therapy.
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Affiliation(s)
| | | | - Philippe Brouqui
- IHU-Méditerranée Infection, Marseille, France; Aix-Marseille Université, IRD, AP-HM, MEPHI, Marseille, France
| | - Pierre Michelet
- Service des Urgences Adultes, Hôpital de la Timone, UMR MD2, Aix-Marseille Université, Marseille, France
| | - Didier Raoult
- IHU-Méditerranée Infection, Marseille, France; Aix-Marseille Université, IRD, AP-HM, MEPHI, Marseille, France
| | - Philippe Parola
- IHU-Méditerranée Infection, Marseille, France; Aix-Marseille Université, IRD, AP-HM, SSA, VITROME, Marseille, France
| | - Jean-Christophe Lagier
- IHU-Méditerranée Infection, Marseille, France; Aix-Marseille Université, IRD, AP-HM, MEPHI, Marseille, France.
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Ingen-Housz-Oro S. Quoi de neuf en dermatologie clinique? Ann Dermatol Venereol 2019; 146:12S1-12S10. [DOI: 10.1016/s0151-9638(20)30100-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bassetti M, Giacobbe DR, Peghin M, Irani P. A look at clinical trial design for new antimicrobials for the adult population. Expert Rev Clin Pharmacol 2019; 12:1037-1046. [PMID: 31607179 DOI: 10.1080/17512433.2019.1680283] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
Introduction: Antimicrobial resistance poses a substantial threat to global public health since it decreases the probability of effectively treating an infection and increases the risk of morbidity and mortality.Areas covered: In this review, the authors discuss the advantages and disadvantages of classical and novel trial designs for evaluating novel antibiotics for infections due to multidrug-resistant organisms (MDRO). An inductive literature search was performed using different keywords pertinent to the reviewed topics.Expert opinion: The need for active, effective compounds has strengthened regulatory, academic, and industry cooperation, leading to the recent approval of some novel anti-MDRO agents, with other promising compounds being also in the late phase of clinical development. Nonetheless, some important issues regarding the design of clinical trials have gained importance that are peculiar for novel anti-MDRO agents and should be addressed for continuing to guarantee the availability of effective treatments in the future. Very importantly, concerted cooperation with regulatory agencies will always be needed for continuously discussing and refining the acceptable level of evidence to be pursued through non-conventional and/or innovative trial designs or development strategies. Failure to do so would seriously pose the risk of perpetuating the unmet need for effective anti-MDRO agents.
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Affiliation(s)
- Matteo Bassetti
- Clinica Malattie Infettive, Ospedale Policlinico San Martino - IRCCS, Genoa, Italy.,Department of Health Sciences, University of Genoa, Genoa, Italy
| | - Daniele Roberto Giacobbe
- Clinica Malattie Infettive, Ospedale Policlinico San Martino - IRCCS, Genoa, Italy.,Department of Health Sciences, University of Genoa, Genoa, Italy
| | - Maddalena Peghin
- Infectious Diseases Division, Department of Medicine University of Udine, Azienda Sanitaria Universitaria Integrata di Udine, Udine, Italy
| | - Paurus Irani
- Global Medical Affairs, Pfizer INC, New York, NY, USA
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