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Krewing M, Mönch E, Bolten A, Niesalla H. Resistance or tolerance? Highlighting the need for precise terminology in the field of disinfection. J Hosp Infect 2024; 150:51-60. [PMID: 38782058 DOI: 10.1016/j.jhin.2024.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Revised: 04/24/2024] [Accepted: 05/06/2024] [Indexed: 05/25/2024]
Abstract
The terms 'resistance' and 'tolerance' are well defined in the context of antibiotic research. However, in the field of disinfection, these terms are often used synonymously, which creates ambiguity and can lead to misunderstandings and misconceptions. In addition, this inconsistency in terminology makes it difficult to assess the risk of a disinfectant resistance. This general review aims to discuss existing definitions of the terms 'adaptation', 'susceptibility', 'tolerance', 'persistence' and 'resistance' in the light of disinfectants. The most ambiguity is found between tolerance and resistance. Whereas the former describes the not necessarily heritable survival of transient exposure to usually lethal concentrations, resistance is the strictly heritable ability to survive otherwise lethal concentrations of an antimicrobial agent, regardless of exposure time. A simple transfer of experience from antibiotic research is not recommended when assessing the risk of resistance to disinfectants, as there are important differences between antibiotics and disinfectants, although both are antimicrobials: (i) disinfectants are usually applied at concentrations that exceed the minimum inhibitory concentration by orders of magnitude, (ii) the exposure times of disinfectants are in the range of seconds, minutes, or a few hours, (iii) the mode of action of disinfectants is less specific, and (iv) disinfectants often contain more than one active agent with additive or synergistic effects. It is important to recognize that disinfectants, like other antimicrobial agents such as antibiotics, have a dualistic nature and should be used correctly and with caution.
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Affiliation(s)
- M Krewing
- Hartmann Science Center, BODE Chemie GmbH - a Company of the Hartmann Group, Hamburg, Germany.
| | - E Mönch
- BODE Chemie GmbH - a Company of the Hartmann Group, Hamburg, Germany
| | - A Bolten
- BODE Chemie GmbH - a Company of the Hartmann Group, Hamburg, Germany
| | - H Niesalla
- Hartmann Science Center, BODE Chemie GmbH - a Company of the Hartmann Group, Hamburg, Germany
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2
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Lan J, Xu L, Wu Y, Chen J, Chen H, Huang J, Yong X, Lu D, Ma X, Cao S. Refining and in-situ growth of polyaniline endows the cellulose fibers with electrical stimulation sterilization. Int J Biol Macromol 2024; 272:132772. [PMID: 38821299 DOI: 10.1016/j.ijbiomac.2024.132772] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/22/2024] [Accepted: 05/28/2024] [Indexed: 06/02/2024]
Abstract
Bacteria and virus infections have posed a great threat to public health and personnel safety. For realizing rapid sterilization of the bacteria and virus, electrical stimulation sterilization was adopted to endow cellulose fibers with instantaneous antibacterial and antiviral properties. In the proposed strategy, the fiber is fluffed by mechanical refining, and then by means of the hydrogen bond between hydroxyl and aniline, the polyaniline (PANI) directionally grows vertically along the fine fibers via in-situ oxidative polymerization. Benefiting from the conductive polyaniline nanorod arrays on the fiber stem, the paper made from PANI modified refined fibers (PANI/BCF/P) exhibited excellent antibacterial and antiviral activity, the inhibition rates against S. aureus, E. coli, and bacteriophage MS2 can up to 100 %, 100 %, and 99.89 %, respectively when a weak voltage (2.5 V) was applied within 20 min. This study provides a feasible path for plant fiber to achieve efficient antibacterial and antiviral activity with electrical stimulation, which is of great significance for the preparation of electroactive antibacterial and antiviral green health products.
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Affiliation(s)
- Jinxin Lan
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Lvlv Xu
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Yao Wu
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Jiazhen Chen
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China
| | - Hui Chen
- Fujian Fynex Textile Science and Technology Co. Ltd., Quanzhou, Fujian 362200, China
| | - Jinfeng Huang
- Fujian Fynex Textile Science and Technology Co. Ltd., Quanzhou, Fujian 362200, China
| | - Xiaofeng Yong
- People's Hospital of Zhongning Country, Zhongwei, Ningxia 755100, China
| | - Dongdong Lu
- Key Lab for Sport Shoes Upper Materials, Fujian Huafeng New Material Co. Ltd., Putian 351164, China
| | - Xiaojuan Ma
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
| | - Shilin Cao
- College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China.
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3
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Ahmed WI, Mohammed AN, Sleim ASA. Efficacy evaluation of hydrogen peroxide disinfectant based zinc oxide nanoparticles against diarrhea causing Escherichia coli in ruminant animals and broiler chickens. Sci Rep 2024; 14:9159. [PMID: 38644372 PMCID: PMC11033286 DOI: 10.1038/s41598-024-59280-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2024] [Accepted: 04/09/2024] [Indexed: 04/23/2024] Open
Abstract
Different strains of Escherichia coli that exhibit genetic characteristics linked to diarrhea pose a major threat to both human and animal health. The purpose of this study was to determine the prevalence of pathogenic Escherichia coli (E. coli), the genetic linkages and routes of transmission between E. coli isolates from different animal species. The efficiency of disinfectants such as hydrogen peroxide (H2O2), Virkon®S, TH4+, nano zinc oxide (ZnO NPs), and H2O2-based zinc oxide nanoparticles (H2O2/ZnO NPs) against isolated strains of E. coli was evaluated. Using 100 fecal samples from different diarrheal species (cow n = 30, sheep n = 40, and broiler chicken n = 30) for E. coli isolation and identification using the entero-bacterial repetitive intergenic consensus (ERIC-PCR) fingerprinting technique. The E. coli properties isolated from several diarrheal species were examined for their pathogenicity in vitro. Scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), Fourier-transform infrared spectrum (FT-IR), X-ray diffraction (XRD), zeta potential, and particle size distribution were used for the synthesis and characterization of ZnO NPs and H2O2/ZnO NPs. The broth macro-dilution method was used to assess the effectiveness of disinfectants and disinfectant-based nanoparticles against E. coli strains. Regarding the results, the hemolytic activity and Congo red binding assays of pathogenic E. coli isolates were 55.3 and 44.7%, respectively. Eleven virulent E. coli isolates were typed into five ERIC-types (A1, A2, B1, B2, and B3) using the ERIC-PCR method. These types clustered into two main clusters (A and B) with 75% similarity. In conclusion, there was 90% similarity between the sheep samples' ERIC types A1 and A2. On the other hand, 89% of the ERIC types B1, B2, and B3 of cows and poultry samples were comparable. The H2O2/ZnO NPs composite exhibits potential antibacterial action against E. coli isolates at 0.04 mg/ml after 120 min of exposure.
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Affiliation(s)
- Walaa I Ahmed
- Bacteriology Lab., Alexandria Provincial Lab., Animal Health Research Institute, Agriculture Research Center (ARC), Giza, Egypt
| | - Asmaa N Mohammed
- Department of Hygiene, Zoonoses and Epidemiology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, 62511, Egypt.
| | - Al-Shimaa A Sleim
- Bacteriology Lab., Alexandria Provincial Lab., Animal Health Research Institute, Agriculture Research Center (ARC), Giza, Egypt
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4
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Chen Z, Yang Y, Li G, Huang Y, Luo Y, Le S. Effective elimination of bacteria on hard surfaces by the combined use of bacteriophages and chemical disinfectants. Microbiol Spectr 2024; 12:e0379723. [PMID: 38483478 PMCID: PMC10986474 DOI: 10.1128/spectrum.03797-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 02/27/2024] [Indexed: 04/06/2024] Open
Abstract
Hospital-acquired infections (HAIs) represent one of the significant causes of morbidity and mortality worldwide, and controlling pathogens in the hospital environment is of great importance. Currently, the standard disinfection method in the hospital environment is chemical disinfection. However, disinfectants are usually not used strictly according to the label, making them less effective in disinfection. Therefore, there is an emergent need to find a better approach that can be used in hospitals to control pathogenic bacteria in the clinical environment. Bacteriophages (phages) are effective in killing bacteria and have been applied in the treatment of bacterial infections but have not received enough attention regarding the control of contamination in the clinical environment. In this study, we found that various phages remain active in the presence of chemical disinfectants. Moreover, the combined use of specific phages and chemical disinfectants is more effective in removing bacterial biofilms and eliminating bacteria on hard surfaces. Thus, this proof-of-concept study indicates that adding phages directly to chemical disinfectants might be an effective and economical approach to enhance clinical environment disinfection. IMPORTANCE In this study, we investigated whether the combination of bacteriophages and chemical disinfectants can enhance the efficacy of reducing bacterial contamination on hard surfaces in the clinical setting. We found that specific phages are active in chemical disinfectants and that the combined use of phages and chemical disinfectants was highly effective in reducing bacterial presence on hard surfaces. As a proof-of-concept, we demonstrated that adding specific phages directly to chemical disinfectants is an effective and cost-efficient strategy for clinical environment disinfection.
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Affiliation(s)
- Zongyue Chen
- School of Nursing, Army Medical University, Chongqing, China
| | - Yuhui Yang
- School of Nursing, Army Medical University, Chongqing, China
| | - Gaoming Li
- Disease Surveillance Division, Center for Disease Control and Prevention of Central Theater Command, Shijingshan, Beijing, China
| | - Youying Huang
- Biomedical Analysis Center, College of Basic Medical Sciences, Army Medical University, Chongqing, China
| | - Yu Luo
- School of Nursing, Army Medical University, Chongqing, China
| | - Shuai Le
- Department of Microbiology, College of Basic Medical Sciences, Key Laboratory of Microbial Engineering Under the Educational Committee in Chongqing, Army Medical University, Chongqing, China
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Missawi O, Wouters C, Lambert J, Garigliany MM, Kestemont P, Cornet V. Realistic microplastics harness bacterial presence and promote impairments in early zebrafish embryos: Behavioral, developmental, and transcriptomic approaches. CHEMOSPHERE 2024; 350:141107. [PMID: 38171397 DOI: 10.1016/j.chemosphere.2023.141107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 12/05/2023] [Accepted: 12/31/2023] [Indexed: 01/05/2024]
Abstract
The plastisphere is a newly recognized ecosystem. However, its interaction with early life stages of aquatic vertebrates is a multifaceted issue that requires further research. This study investigated the involvement of bacteria in shaping realistic microplastics hazards in zebrafish Danio rerio embryos. Fish were exposed to bottle micro-fragments (FR) and textile micro-fibers (FI) of polyethylene terephthalate (5-15 μm), concomitant with Aeromonas salmonicida achromogenes challenge from 2h post-fertilization for 3 days. Egg chorion showed affinity for FR and FI, inducing earlier embryo hatching. However, this effect was masked by biofilm invasion. Fragments were more detrimental than fibers on developmental parameters, while bacterial presence compromised body length, eye, and yolk sac surface area. In a further finding, MPs alone increased locomotor activity in zebrafish larvae, without synergistic effect when combined with bacteria. Data showed that realistic MPs had no significant effects except for downregulated sod and cyp1a gene expression, whereas bacterial challenge inhibited larval potency for most of the evaluated mRNA levels (mpx (immune system), apoeb (lipid metabolism), nfkb and tfa (inflammation), cyp and sod (oxidative stress)). This study provides new insights into realistic microplastic effects under relevant conditions when combined with environmental pathogen within the first life stages of aquatic vertebrates.
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Affiliation(s)
- Omayma Missawi
- University of Namur, Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment, Namur, Belgium.
| | - Charlotte Wouters
- University of Namur, Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment, Namur, Belgium
| | - Jérôme Lambert
- University of Namur, Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment, Namur, Belgium
| | - Mutien-Marie Garigliany
- University of Liege, Laboratory of Veterinary Pathology, Fundamental and Applied Research for Animals & Health (FARAH), Liege, Belgium
| | - Patrick Kestemont
- University of Namur, Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment, Namur, Belgium
| | - Valérie Cornet
- University of Namur, Research Unit in Environmental and Evolutionary Biology (URBE), Institute of Life, Earth & Environment, Namur, Belgium
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6
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Watson F, Wilks S, Keevil CW, Chewins J. Modelling hospital disinfectant against multi-drug-resistant dry surface biofilms grown under artificial human sweat. J Hosp Infect 2023; 141:190-197. [PMID: 37343768 DOI: 10.1016/j.jhin.2023.06.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/08/2023] [Accepted: 06/13/2023] [Indexed: 06/23/2023]
Abstract
BACKGROUND Dry surface biofilms (DSBs) have been found abundantly across hospital surfaces within intensive care units and may explain how nosocomial pathogens can remain virulent and persist on surfaces for extended periods. Testing standards governing the performance of disinfectant products employ planktonic models under routine growth conditions, which are known to be less tolerant than their biofilm counterpart. AIM To evaluate biofilm models cultured under artificial human sweat (AHS), a source of nutrient expected on touch surfaces, to assess the antimicrobial performance of common cleaning agents, including a quaternary ammonium, hydrogen peroxide and active chlorine. METHODS Five single-species biofilms, using pathogenic bacteria such as Acinetobacter baumannii, Pseudomonas aeruginosa, Staphylococcus aureus and Enterococcus faecalis, were generated on stainless-steel substrates using a sedimentation protocol under both AHS and nutrient-rich conditions for a direct comparison of phenotypic tolerance. The biofilm models were grown over five days followed by desiccation cycles, before being submerged into the disinfectant solutions for up to 25 min. Epifluorescence (EF) microscopy using LIVE/DEAD™ stain was used to visualize microcolony viability. FINDINGS The results revealed biofilms cultured under AHS exhibited a greater antimicrobial tolerance and reduced speed of kill for all cleaning agents compared with the routine media; an average reduction of 72.4% vs 96.9%, respectively. EF microscopy revealed traces of viable bacteria across all coupons after disinfection indicating a potential opportunity for regrowth and recontamination. CONCLUSION The notable difference in biocidal performance between the two growth conditions highlights potential pitfalls within current antimicrobial test standards, and the importance of accurate representation of the microbial challenge.
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Affiliation(s)
- F Watson
- School of Biological Sciences, University of Southampton, Southampton, UK; Bioquell UK Ltd, Andover, UK
| | - S Wilks
- School of Biological Sciences, University of Southampton, Southampton, UK; School of Health Sciences, University of Southampton, Southampton, UK
| | - C W Keevil
- School of Biological Sciences, University of Southampton, Southampton, UK
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Guo L, Zhao P, Jia Y, Wang Z, Chen M, Zhang H, Liu D, Zhang Y, Wang X, Rong M. Inactivation of airborne pathogenic microorganisms by plasma-activated nebulized mist. JOURNAL OF HAZARDOUS MATERIALS 2023; 459:132072. [PMID: 37480605 DOI: 10.1016/j.jhazmat.2023.132072] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 06/21/2023] [Accepted: 07/14/2023] [Indexed: 07/24/2023]
Abstract
The airborne microorganisms in the aerosols are one main transmission way of pathogenic microorganisms and therefore inactivation of microorganisms in aerosols could effectively prevent the transmission of pathogenic microorganisms to control epidemics. The mist nebulized by plasma-activated air could effectively inactivate bacteria and could be developed for the sterilization of microorganisms in aerosols. In this study, the plasma-activated nebulized mist (PANM) was applied for the inactivation of microorganisms in aerosols and efficiently inactivated the bacteria, yeast, and viruses in aerosols after 2-min treatment. The PANM treatment caused morphologic changes and damage to the bacteria cells in aerosols. The PANM could also inactivate the microorganisms attached to the surface of the treatment chamber and the bacteria attached to the skin of mice within 6-min treatment. The biosafety assays demonstrated that the PANM treatment exhibited no effects on the behavior, hematological and serum biochemical parameters of blood, and organs from the mice. This study would supply an efficient, broad-spectrum, and safe aerosol sterilization strategy based on plasma technology to prevent the transmission of airborne microorganisms.
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Affiliation(s)
- Li Guo
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Pengyu Zhao
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Yikang Jia
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Zifeng Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Min Chen
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Hao Zhang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Dingxin Liu
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China.
| | - Yong Zhang
- State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Xiaohua Wang
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Mingzhe Rong
- State Key Laboratory of Electrical Insulation and Power Equipment, Center for Plasma Biomedicine, Xi'an Jiaotong University, Xi'an 710049, PR China
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Wang JC, Huang WC, Cheng KF, Liu NT, Wu KH. Past-expiration-date liquid disinfectants to deactivate biological and chemical toxins on building material surfaces. RSC Adv 2023; 13:28904-28911. [PMID: 37795046 PMCID: PMC10545978 DOI: 10.1039/d3ra04965e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Accepted: 09/19/2023] [Indexed: 10/06/2023] Open
Abstract
In this study, we evaluated the deactivating efficacy of strong basicity-based (T4-102) and hydrogen peroxide-based (DF-200) disinfectants that were past their expiration date when used to deactivate biological and chemical toxins on building material surfaces. The decontamination efficacies of DF-200 and T4-102 disinfectants against dimethyl methylphosphonate (DMMP) and 2-chloroethyl ethylsulfide (2-CEES) were studied using GC-MS analysis. The bactericidal efficacies of disinfectants against Gram-negative E. coli and P. aeruginosa, and Gram-positive B. subtilis and S. aureus, were assessed in terms of the zone of inhibition, minimum inhibitory concentration (MIC), and minimum bactericidal concentration (MBC). The results indicated that the deactivation efficacy varied significantly according to the disinfectant amount, contact time, and building material. Higher efficacy of up to 99-100% was observed for biological toxins, despite passing their expiration dates. Approximately 70-78% of deactivation efficacies were observed for disinfectants against DMMP on the tile coupon at 100 μL and 24 h contact time. Moreover, the deactivation efficacy of DF-200 was better than that of T4-102. The data presented here demonstrate that the responders may use past-expiration-date disinfectants for efficacious disinfectaion in large-scale contamination incidents.
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Affiliation(s)
- Je-Chuang Wang
- Department of Chemistry and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Tahsi Taoyuan 33551 Taiwan
| | - Wen-Chien Huang
- Department of Chemistry and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Tahsi Taoyuan 33551 Taiwan
| | - Ken-Fa Cheng
- Department of Chemistry and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Tahsi Taoyuan 33551 Taiwan
| | - Nien-Tung Liu
- Department of Chemistry and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Tahsi Taoyuan 33551 Taiwan
| | - Kuo-Hui Wu
- Department of Chemistry and Materials Engineering, Chung Cheng Institute of Technology, National Defense University Tahsi Taoyuan 33551 Taiwan
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Morse R, Childers C, Nowak E, Rao J, Vlaisavljevich E. Catheter-Based Medical Device Biofilm Ablation Using Histotripsy: A Parameter Study. ULTRASOUND IN MEDICINE & BIOLOGY 2023:S0301-5629(23)00203-X. [PMID: 37394375 DOI: 10.1016/j.ultrasmedbio.2023.06.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/07/2023] [Accepted: 06/13/2023] [Indexed: 07/04/2023]
Abstract
OBJECTIVE Biofilm formation in medical catheters is a major source of hospital-acquired infections which can produce increased morbidity and mortality for patients. Histotripsy is a non-invasive, non-thermal focused ultrasound therapy and recently has been found to be effective at removal of biofilm from medical catheters. Previously established histotripsy methods for biofilm removal, however, would require several hours of use to effectively treat a full-length medical catheter. Here, we investigate the potential to increase the speed and efficiency with which biofilms can be ablated from catheters using histotripsy. METHODS Pseudomonas aeruginosa (PA14) biofilms were cultured in in vitro Tygon catheter mimics and treated with histotripsy using a 1 MHz histotripsy transducer and a variety of histotripsy pulsing rates and scanning methods. The improved parameters identified in these studies were then used to explore the bactericidal effect of histotripsy on planktonic PA14 suspended in a catheter mimic. RESULTS Histotripsy can be used to remove biofilm and kill bacteria at substantially increased speeds compared with previously established methods. Near-complete biofilm removal was achieved at treatment speeds up to 1 cm/s, while a 4.241 log reduction in planktonic bacteria was achieved with 2.4 cm/min treatment. CONCLUSION These results represent a 500-fold increase in biofilm removal speeds and a 6.2-fold increase in bacterial killing speeds compared with previously published methods. These findings indicate that histotripsy shows promise for the treatment of catheter-associated biofilms and planktonic bacteria in a clinically relevant time frame.
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Affiliation(s)
- Ryan Morse
- Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA, USA.
| | | | - Elizabeth Nowak
- Internal Medicine, Division of Infectious Disease, Carilion Medical Center, Roanoke, VA, USA
| | - Jayasimha Rao
- Virginia Tech Carilion School of Medicine, Virginia Tech, Roanoke, VA, USA; Internal Medicine, Division of Infectious Disease, Carilion Medical Center, Roanoke, VA, USA
| | - Eli Vlaisavljevich
- Department of Biomedical Engineering and Mechanics, Virginia Tech, Roanoke, VA, USA
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10
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Zhu M, Dang J, Dong F, Zhong R, Zhang J, Pan J, Li Y. Antimicrobial and cleaning effects of ultrasonic-mediated plasma-loaded microbubbles on Enterococcus faecalis biofilm: an in vitro study. BMC Oral Health 2023; 23:133. [PMID: 36890534 PMCID: PMC9996855 DOI: 10.1186/s12903-023-02813-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 02/13/2023] [Indexed: 03/10/2023] Open
Abstract
BACKGROUND Enterococcus faecalis (E. faecalis) is the most frequently isolated bacteria from teeth with root canal treatment failure. This study aims to evaluate the disinfection effect of ultrasonic-mediated cold plasma-loaded microbubbles (PMBs) on 7d E. faecalis biofilm, the mechanical safety and the mechanisms. METHODS The PMBs were fabricated by a modified emulsification process and the key reactive species, nitric oxide (NO) and hydrogen peroxide (H2O2) were evaluated. The 7d E. faecalis biofilm on human tooth disk was constructed and divided into the following groups: PBS, 2.5%NaOCl, 2%CHX, and different concentrations of PMBs (108 mL-1, 107 mL-1). The disinfection effects and elimination effects were verified with confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). Microhardness and roughness change of dentin after PMBs treatment were verified respectively. RESULTS The concentration of NO and H2O2 in PMBs increased by 39.99% and 50.97% after ultrasound treatment (p < 0.05) respectively. The CLSM and SEM results indicate that PMBs with ultrasound treatment could remove the bacteria and biofilm components effectively, especially those living in dentin tubules. The 2.5% NaOCl presented an excellent effect against biofilm on dishes, but the elimination effect on dentin tubules is limited. The 2% CHX group exhibits significant disinfection effect. The biosafety tests indicated that there is no significant changes on microhardness and roughness after PMBs with ultrasound treatment (p > 0.05). CONCLUSION PMBs combined with ultrasound treatment exhibited significant disinfection effect and biofilm removal effect, the mechanical safety is acceptable.
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Affiliation(s)
- Mengqian Zhu
- Department of General Dentistry, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, 100081, China
| | - Jie Dang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Feihong Dong
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China
| | - Ruoqing Zhong
- Department of General Dentistry, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, 100081, China
| | - Jue Zhang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.,College of Engineering, Peking University, Beijing, 100871, China
| | - Jie Pan
- Department of General Dentistry, Peking University School and Hospital of Stomatology, National Center of Stomatology, National Clinical Research Center for Oral Diseases, National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, 100081, China.
| | - Yinglong Li
- Department of Stomatology, Beijing Chao-Yang Hospital, Capital Medical University, Beijing, 100020, China.
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11
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Adjuvant role of probiotics in allergen-specific immunotherapy. Clin Immunol 2022; 245:109164. [DOI: 10.1016/j.clim.2022.109164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 10/04/2022] [Accepted: 10/06/2022] [Indexed: 11/19/2022]
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12
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Liang Z, Yan Y, Zhang W, Luo H, Yao B, Huang H, Tu T. Review of glucose oxidase as a feed additive: production, engineering, applications, growth-promoting mechanisms, and outlook. Crit Rev Biotechnol 2022:1-18. [PMID: 35723581 DOI: 10.1080/07388551.2022.2057275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The regulation and prohibition of antibiotics used as growth promoters (AGP) in the feed field are increasing because they cause antimicrobial resistance and drug residue issues and threaten community health. Recently, glucose oxidase (GOx) has attracted increasing interest in the feed industry as an alternative to antibiotics. GOx specifically catalyzes the production of gluconic acid (GA) and hydrogen peroxide (H2O2) by consuming molecular oxygen, and plays an important role in relieving oxidative stress, preserving health, and promoting animal growth. To expand the application of GOx in the feed field, considerable efforts have been made to mine new genetic resources. Efforts have also been made to heterologously overexpress relevant genes to reduce production costs and to engineer proteins by modifying enzyme properties, both of which are bottleneck problems that limit industrial feed applications. Herein, the: different sources, diverse biochemical properties, distinct structural features, and various strategies of GOx engineering and heterologous overexpression are summarized. The mechanism through which GOx promotes growth in animal production, including the improvement of antioxidant capacity, maintenance of intestinal microbiota homeostasis, and enhancement of gut function, are also systematically addressed. Finally, a new perspective is provided for the future development of GOx applications in the feed field.
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Affiliation(s)
- Ziqi Liang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China.,College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Yaru Yan
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Wei Zhang
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Huiying Luo
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Bin Yao
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Huoqing Huang
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Tao Tu
- State Key Laboratory of Animal Nutrition, Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
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13
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Ghoshal M, Ryu V, McLandsborough L. Evaluation of the efficacy of antimicrobials against pathogens on food contact surfaces using a rapid microbial log reduction detection method. Int J Food Microbiol 2022; 373:109699. [DOI: 10.1016/j.ijfoodmicro.2022.109699] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 03/01/2022] [Accepted: 04/30/2022] [Indexed: 11/24/2022]
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14
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No-Touch Automated Disinfection System Based on Hydrogen Peroxide and Ethyl Alcohol Aerosols for Use in Healthcare Environments. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19084868. [PMID: 35457735 PMCID: PMC9029184 DOI: 10.3390/ijerph19084868] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Revised: 04/10/2022] [Accepted: 04/15/2022] [Indexed: 02/04/2023]
Abstract
Healthcare-related infections are sustained by various bacteria and fungi. In recent years, various technologies have emerged for the sanitation of healthcare-related environments. This study evaluated the effectiveness of a no-touch disinfection system that aerosolizes 5% hydrogen peroxide and 10% ethyl alcohol. After selecting an environment, the Total Bacterial Count and the Total Fungal Count in the air and on a surface of the room were determined to evaluate the effectiveness of the aerosolization system. In addition, sterile stainless-steel plates inoculated with S. aureus, P. aeruginosa, and Aspergillus spp. isolated from hospitalized patients and reference strains were used to evaluate the effectiveness of the system. For each organism, three plates were used: A (cleaned), B (not cleaned), and C (control). The A plates were treated with non-ionic surfactant and the aerosolization system, the B plates were subjected to the aerosolization system, and the plates C were positioned outside the room that was sanitized. Following sanitization, air and surface sampling was conducted, after which, swabs were processed for bacterial and fungal enumeration. The results showed that the air sanitization system had good efficacy for both bacteria and fungi in the air and on stainless-steel plates, particularly for the A plates.
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15
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Mechmechani S, Khelissa S, Gharsallaoui A, Omari KE, Hamze M, Chihib NE. Hurdle technology using encapsulated enzymes and essential oils to fight bacterial biofilms. Appl Microbiol Biotechnol 2022; 106:2311-2335. [PMID: 35312826 DOI: 10.1007/s00253-022-11875-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2021] [Revised: 02/25/2022] [Accepted: 03/06/2022] [Indexed: 11/02/2022]
Abstract
Biofilm formation on abiotic surfaces has become a major public health concern because of the serious problems they can cause in various fields. Biofilm cells are extremely resistant to stressful conditions, because of their complex structure impedes antimicrobial penetration to deep-seated cells. The increased resistance of biofilm to currently applied control strategies underscores the urgent need for new alternative and/or supplemental eradication approaches. The combination of two or more methods, known as Hurdle technology, offers an excellent option for the highly effective control of biofilms. In this perspective, the use of functional enzymes combined with biosourced antimicrobial such as essential oil (EO) is a promising alternative anti-biofilm approach. However, these natural antibiofilm agents can be damaged by severe environmental conditions and lose their activity. The microencapsulation of enzymes and EOs is a promising new technology for enhancing their stability and improving their biological activity. This review article highlights the problems related to biofilm in various fields, and the use of encapsulated enzymes with essential oils as antibiofilm agents. KEY POINTS: • Problems associated with biofilms in the food and medical sectors and their subsequent risks on health and food quality. • Hurdle technology using enzymes and essential oils is a promising strategy for an efficient biofilms control. • The microencapsulation of enzymes and essential oils ensures their stability and improves their biological activities.
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Affiliation(s)
- Samah Mechmechani
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux Et Transformations, Lille, France.,Laboratoire Microbiologie Santé Et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
| | - Simon Khelissa
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux Et Transformations, Lille, France
| | - Adem Gharsallaoui
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS, LAGEPP UMR 5007, Villeurbanne, France
| | - Khaled El Omari
- Laboratoire Microbiologie Santé Et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
| | - Monzer Hamze
- Laboratoire Microbiologie Santé Et Environnement (LMSE), Doctoral School of Sciences and Technology, Faculty of Public Health, Lebanese University, Tripoli, Lebanon
| | - Nour-Eddine Chihib
- Univ. Lille, CNRS, INRAE, Centrale Lille, UMR 8207 - UMET - Unité Matériaux Et Transformations, Lille, France.
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16
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Kruszewska E, Czupryna P, Pancewicz S, Martonik D, Bukłaha A, Moniuszko-Malinowska A. Is Peracetic Acid Fumigation Effective in Public Transportation? INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19052526. [PMID: 35270221 PMCID: PMC8909421 DOI: 10.3390/ijerph19052526] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2022] [Revised: 02/16/2022] [Accepted: 02/19/2022] [Indexed: 02/04/2023]
Abstract
The COVID-19 pandemic made more people aware of the danger of viruses and bacteria, which is why disinfection began to be used more and more often. Epidemiological safety must be ensured not only in gathering places, but also in home and work environments. It is especially challenging in public transportation, which is a perfect environment for the spread of infectious disease. Therefore, the aim of the study was the identification of bacteria in crowded places and the evaluation of the effect of fumigation with peracetic acid (PAA) in public transportation. Inactivation of microorganisms in buses and long-distance coaches was carried out using an automatic commercial fogging device filled with a solution of peracetic acid stabilized with acetic acid (AA) and hydrogen peroxide (H2O2). Before and after disinfection, samples were taken for microbiological tests. The most prevalent bacteria were Micrococcus luteus and Bacillus licheniformis.Staphylococcus epidermidis was only present in buses, whereas Staphylococcus hominis and Exiguobacterium acetylicum were only present in coaches. Statistical analysis showed a significant reduction in the number of microorganisms in samples taken from different surfaces after disinfection in vehicles. The overall effectiveness of disinfection was 81.7% in buses and 66.5% in coaches. Dry fog fumigation with peracetic acid is an effective method of disinfecting public transport vehicles.
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Affiliation(s)
- Ewelina Kruszewska
- Department of Infectious Diseases and Neuroinfections, Medical University of Białystok, Żurawia 14, 15-540 Białystok, Poland; (P.C.); (S.P.); (A.M.-M.)
- Correspondence:
| | - Piotr Czupryna
- Department of Infectious Diseases and Neuroinfections, Medical University of Białystok, Żurawia 14, 15-540 Białystok, Poland; (P.C.); (S.P.); (A.M.-M.)
| | - Sławomir Pancewicz
- Department of Infectious Diseases and Neuroinfections, Medical University of Białystok, Żurawia 14, 15-540 Białystok, Poland; (P.C.); (S.P.); (A.M.-M.)
| | - Diana Martonik
- Department of Infectious Diseases and Hepatology, Medical University of Białystok, Żurawia 14, 15-540 Białystok, Poland;
| | - Anna Bukłaha
- Department of Microbiological Diagnostics and Infectious Immunology, Medical University of Białystok, Waszyngtona 15A, 15-269 Białystok, Poland;
| | - Anna Moniuszko-Malinowska
- Department of Infectious Diseases and Neuroinfections, Medical University of Białystok, Żurawia 14, 15-540 Białystok, Poland; (P.C.); (S.P.); (A.M.-M.)
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17
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Guerrero-Navarro AE, Ríos-Castillo AG, Ripolles-Avila C, Zamora A, Hascoët AS, Felipe X, Castillo M, Rodríguez-Jerez JJ. Effectiveness of enzymatic treatment for reducing dairy fouling at pilot-plant scale under real cleaning conditions. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112634] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Sharma S, Jaiswal S, Duffy B, Jaiswal AK. Advances in emerging technologies for the decontamination of the food contact surfaces. Food Res Int 2022; 151:110865. [PMID: 34980401 DOI: 10.1016/j.foodres.2021.110865] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 11/13/2021] [Accepted: 12/02/2021] [Indexed: 11/18/2022]
Abstract
Foodborne pathogens could be transferred to food from food contact surfaces contaminated by poor hygiene or biofilm formation. The food processing industry has various conditions favouring microbes' adherence, such as moisture, nutrients, and the microbial inoculums obtained from the raw material. The function of the ideal antimicrobial surface is preventing initial attachment of the microbes, killing the microbes or/and removing the dead bacteria. This review article provides detail about the challenges food industries are facing with respect to food contact materials. It also summarises the merits and demerits of several sanitizing methods developed for industrial use. Furthermore, it reviews the new and emerging techniques that enhance the efficiency of reducing microbial contamination. Techniques such as surface functionalisation, high-intensity ultrasound, cold plasma technologies etc. which have high potential to be used for the decontamination of food contact surfaces are discussed. The emerging designs of antibacterial surfaces provide the opportunity to reduce or eradicate the adhesion of microorganisms. The most important purpose of these surfaces is to prevent the attachment of bacteria and to kill the bacteria that come in contact. These emerging technologies have a high potential for developing safe and inert food contact materials for the food industry.
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Affiliation(s)
- Shubham Sharma
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin - City Campus, Central Quad, Grangegorman, Dublin D07 ADY7, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin - City Campus, Grangegorman, Dublin D07 H6K8, Ireland; Centre for Research in Engineering and Surface Technology (CREST-Gateway), FOCAS Institute, Technological University Dublin - City Campus, Kevin Street, Dublin D08 CKP1, Ireland
| | - Swarna Jaiswal
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin - City Campus, Central Quad, Grangegorman, Dublin D07 ADY7, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin - City Campus, Grangegorman, Dublin D07 H6K8, Ireland.
| | - Brendan Duffy
- Centre for Research in Engineering and Surface Technology (CREST-Gateway), FOCAS Institute, Technological University Dublin - City Campus, Kevin Street, Dublin D08 CKP1, Ireland
| | - Amit K Jaiswal
- School of Food Science and Environmental Health, College of Sciences and Health, Technological University Dublin - City Campus, Central Quad, Grangegorman, Dublin D07 ADY7, Ireland; Environmental Sustainability and Health Institute, Technological University Dublin - City Campus, Grangegorman, Dublin D07 H6K8, Ireland
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19
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Leonarta F, Lee CK. Nanofibrous Membrane with Encapsulated Glucose Oxidase for Self-Sustained Antimicrobial Applications. MEMBRANES 2021; 11:997. [PMID: 34940498 PMCID: PMC8704349 DOI: 10.3390/membranes11120997] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/15/2021] [Accepted: 12/16/2021] [Indexed: 11/16/2022]
Abstract
Polyvinyl alcohol (PVA) nanofibrous membrane, consisting of separately encapsulated glucose oxidase (GOx) and glucose (Glu) nanofibers, was prepared via simultaneously electrospinning PVA/GOx and PVA/Glu dopes. The as-prepared pristine membrane could self-sustainably generate hydrogen peroxide (H2O2) only in contact with an aqueous solution. The H2O2 production level was well maintained even after storing the dry membrane at room temperature for 7 days. Cross-linking the membrane via reaction with glutaraldehyde (GA) vapor could not only prevent the nanofibrous membrane from dissolving in water but also prolonged the release of H2O2. The sustained release of H2O2 from the membrane achieved antimicrobial capability equivalent to that of 1% H2O2 against both Escherichia coli and Staphylococcus aureus. Gram(+) S. aureus cells were more susceptible to H2O2 than Gram(-) E. coli and >99% of S. aureus were killed after 1 h incubation with the membrane. Pristine and GA-crosslinked nanofibrous membrane with in situ production of H2O2 were self-sterilized in which no microorganism contamination on the membrane could be detected after 2 weeks incubation on an agar plate. The GOx/Glu membrane may find potential application as versatile antimicrobial materials in the field of biomedicine, in the food and health industries, and especially challenges related to wound healing in diabetic patients.
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Affiliation(s)
| | - Cheng-Kang Lee
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan;
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20
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Occurrence of P. aeruginosa in Water Intended for Human Consumption and in Swimming Pool Water. ENVIRONMENTS 2021. [DOI: 10.3390/environments8120132] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Considering the fact that water is a basic need of every living being, it is important to ensure its safety. In this work, the data on the presence of the opportunistic pathogen P. aeruginosa in drinking water (n = 4171) as well as in pool water (n = 5059) in Primorje-Gorski Kotar County in Croatia in the five-year period (2016–2020) were analysed. In addition, the national criteria were compared with those of neighboring countries and worldwide. The proportion of P. aeruginosa-positive samples was similar for drinking water (3.9%) and pool water (4.6%). The prevalence of this bacterium was most pronounced in the warmer season. P. aeruginosa-positive drinking water samples were mostly collected during building commissioning, while pool samples were from entertainment and spa/hydromassage pools. Outdoor pools showed a higher percentage of positive samples than indoor pools, as well as the pools filled with freshwater rather than seawater. The highest P. aeruginosa load was found in rehabilitation pools. Croatia, Serbia and Montenegro are countries that have included P. aeruginosa in their national regulations as an indicator of the safety of water for human consumption as well as for bottled water, while Slovenia and Bosnia and Herzegovina have limited this requirement to bottled water only. In the case of swimming pool water, this parameter is mandatory in all countries considered in this study.
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21
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Childers C, Edsall C, Gannon J, Whittington AR, Muelenaer AA, Rao J, Vlaisavljevich E. Focused Ultrasound Biofilm Ablation: Investigation of Histotripsy for the Treatment of Catheter-Associated Urinary Tract Infections (CAUTIs). IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2021; 68:2965-2980. [PMID: 33950839 DOI: 10.1109/tuffc.2021.3077704] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Urinary catheters often become contaminated with biofilms, resulting in catheter-associated urinary tract infections (CAUTIs) that adversely affect patient outcomes. Histotripsy is a noninvasive focused ultrasound therapy previously developed for the noninvasive ablation of cancerous tumors and soft tissues. Histotripsy has also previously shown the ability to treat biofilms on glass slides and surgical meshes. Here, we investigate the potential of histotripsy for the treatment of CAUTIs for the first time in vitro. Clinically relevant catheter materials (Tygon, Silicone, and latex catheter mimics) and commonly used clinical catheters were tested to determine the feasibility of producing luminal histotripsy bubble clouds. A Pseudomonas aeruginosa (strain PA14) biofilm model was developed and tested to produce luminal biofilms in an in vitro Tygon catheter mimic. This model was treated with histotripsy to determine the ability to remove a luminal biofilm. Finally, the bactericidal effects of histotripsy were tested by treating PA14 suspended inside the Tygon catheter mimic. Results showed that histotripsy produced precise luminal cavitation within all tested catheter mimics and clinical catheters. Histotripsy treatment of a PA14 biofilm with histotripsy reduced luminal biofilm OD590 signal down to background levels. Further, the treatment of suspended PA14 in Luria-Bertani (LB) showed a 3.45 ± 0.11 log10 reduction in CFU/mL after six histotripsy scans across the catheter mimics. Overall, the results of this study demonstrate the potential of histotripsy to provide a new modality for removing bacterial biofilms from catheter-based medical devices and suggest that additional work is warranted to investigate histotripsy for the treatment of CAUTIs and other biomaterial-associated infections.
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22
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Woodhouse I, Nejati S, Selvamani V, Jiang H, Chittiboyina S, Grant J, Mutlu Z, Waimin J, Abutaleb NS, Seleem MN, Rahimi R. Flexible Microneedle Array Patch for Chronic Wound Oxygenation and Biofilm Eradication. ACS APPLIED BIO MATERIALS 2021; 4:5405-5415. [PMID: 35006756 DOI: 10.1021/acsabm.1c00087] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Chronic nonhealing wounds are a growing socioeconomic problem that affects more than 6 million people annually solely in the United States. These wounds are colonized by bacteria that often develop into biofilms that act as a physical and chemical barrier to therapeutics and tissue oxygenation leading to chronic inflammation and tissue hypoxia. Although wound debridement and vigorous mechanical abrasion techniques are often used by clinical professionals to manage and remove biofilms from wound surfaces, such methods are highly nonselective and painful. In this study, we have developed a flexible polymer composite microneedle array that can overcome the physicochemical barriers (i.e., bacterial biofilm) present in chronic nonhealing wounds and codeliver oxygen and bactericidal agents. The polymeric microneedles are made by using a facile UV polymerization process of polyvinylpyrrolidone and calcium peroxide onto a flexible polyethylene terephthalate substrate for conformable attachment onto different locations of the human body surface. The microneedles effectively elevate the oxygen levels from 8 to 12 ppm once dissolved over the course of 2 h while also providing strong bactericidal effects on both liquid and biofilm bacteria cultures of both Gram-positive (Staphylococcus aureus) and Gram-negative (Pseudomonas aeruginosa) bacterial strains commonly found in dermal wounds. Furthermore, the results from the ex vivo assay on a porcine wound model indicated successful insertion of the microneedles into the tissue while also providing effective bactericidal properties against both Gram-positive and Gram-negative within the complex tissue matrix. Additionally, the microneedles demonstrate high levels of cytocompatibility with less than 10% of apoptosis throughout 6 days of continuous exposure to human dermal fibroblast cells. The demonstrated flexible microneedle array can provide a better approach for increasing the effectiveness of topical tissue oxygenation as well as the treatment of infected wounds with intrinsically antibiotic resistant biofilms.
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Affiliation(s)
- Ian Woodhouse
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Sina Nejati
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Vidhya Selvamani
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Hongjie Jiang
- Shien-Ming Wu School of Intelligent Engineering, South China University of Technology, Guangzhou 511442, China
| | - Shirisha Chittiboyina
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,Department of Basic Medical Sciences, Purdue University, 625 Harrison Street, West Lafayette, Indiana 47907, United States
| | - Jesse Grant
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Zeynep Mutlu
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Jose Waimin
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States
| | - Nader S Abutaleb
- Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, 1410 Prices Fork Road, Blacksburg, Virginia 24061, United States
| | - Mohamed N Seleem
- Department of Biomedical Sciences and Pathobiology, Virginia Polytechnic Institute and State University, 1410 Prices Fork Road, Blacksburg, Virginia 24061, United States
| | - Rahim Rahimi
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907-2057, United States.,School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907-2045, United States.,School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907-2035, United States
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23
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Jones IA, Joshi LT. Biocide Use in the Antimicrobial Era: A Review. Molecules 2021; 26:molecules26082276. [PMID: 33919993 PMCID: PMC8071000 DOI: 10.3390/molecules26082276] [Citation(s) in RCA: 59] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Revised: 04/03/2021] [Accepted: 04/06/2021] [Indexed: 12/12/2022] Open
Abstract
Biocides are widely used in healthcare and industry to control infections and microbial contamination. Ineffectual disinfection of surfaces and inappropriate use of biocides can result in the survival of microorganisms such as bacteria and viruses on inanimate surfaces, often contributing to the transmission of infectious agents. Biocidal disinfectants employ varying modes of action to kill microorganisms, ranging from oxidization to solubilizing lipids. This review considers the main biocides used within healthcare and industry environments and highlights their modes of action, efficacy and relevance to disinfection of pathogenic bacteria. This information is vital for rational use and development of biocides in an era where microorganisms are becoming resistant to chemical antimicrobial agents.
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24
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Cornell KA, White A, Croteau A, Carlson J, Kennedy Z, Miller D, Provost M, Goering S, Plumlee D, Browning J. Fabrication and Performance of a Multi-Discharge Cold Atmospheric Pressure Plasma Array. IEEE TRANSACTIONS ON PLASMA SCIENCE. IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY 2021; 49:1388-1395. [PMID: 34024956 PMCID: PMC8132946 DOI: 10.1109/tps.2021.3064993] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Cold atmospheric pressure plasma (CAP) has been shown to kill bacteria and remove biofilms. Here we report the development of a unique CAP array device consisting of a parallel stack of eight linear-discharge plasma elements that create a ~ 5 cm2 (2.4 cm × 2 cm) treatment area. The CAP device is fabricated from Low Temperature Co-fired Ceramic (LTCC) layers to create 24 mm long linear-discharge channels (500 μm gap) with embedded opposing silver metal electrodes. A 20 kHz AC voltage (0.5-5 kV) applied to the electrodes generates an Ar/O2 plasma between the plates, with the gas flow directing the reactive species toward the biological sample (biofilms, etc.) to affect the antimicrobial treatment. External ballast resistors were used to study discharge uniformity in the stacked array elements and internal thick film ballast resistors (≈150 kΩ) were developed to create a fully integrated device. Typical element discharge currents were 1-2.5 mA with the total array current tested at 20 mA to provide optimal device uniformity. The plasma discharge was further shown to produce reactive hydrogen peroxide and exert antimicrobial effects on Pseudomonas biofilms and Salmonella contaminated eggshell samples, with >99% of the bacterial cells killed with less than 60 seconds of plasma exposure.
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Affiliation(s)
- Kenneth A Cornell
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Amanda White
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Adam Croteau
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Jessica Carlson
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Zeke Kennedy
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Dalton Miller
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Mariah Provost
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Spencer Goering
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Don Plumlee
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
| | - Jim Browning
- Boise State University in the following departments: Chemistry & Biochemistry: Cornell, Miller, Provost, and Goering; Mechanical & Biomedical Engineering: White, Carlson, Kennedy, and Plumlee; Electrical & Computer Engineering: Croteau and Browning
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Abdel-Latef GK, Mohammed AN. Efficiency evaluation of some novel disinfectants and anti-bacterial nanocomposite on zoonotic bacterial pathogens in commercial Mallard duck pens for efficient control. J Adv Vet Anim Res 2021; 8:105-115. [PMID: 33860020 PMCID: PMC8043352 DOI: 10.5455/javar.2021.h492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 11/28/2020] [Accepted: 10/17/2020] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE This work aimed to detect the frequency of pathogenic bacteria of zoonotic importance in ducks' dropping, their surrounding environment, and farmworkers in contact with them. Furthermore, the susceptibility pattern of isolated bacteria to antimicrobial drugs and the efficiency of disinfectants (CID 20, Durak® plus, and hydrogen peroxide (H2O2), nano zinc oxide (ZnO NPs), and hydrogen peroxide loaded nano zinc oxide (H2O2/ZnO NPs) composites against isolated bacteria were evaluated. MATERIALS AND METHODS A total of 271 samples were collected from duck pens, including 35 fecal droppings, 200 environmental samples, and 36 from the hands of pen workers for isolation and identification of bacterial strains using standard microbiological procedures. After that, the antibiotic sensitivity testing of 40 bacterial isolates was carried out using disk diffusion assay. ZnO NPs and H2O2/ZnO NPs were characterized using Fourier-transform infrared spectrum and high-resolution transmission electron microscopy. The efficacy of disinfectants and nanocomposites was evaluated against enteropathogenic bacteria using the broth macro-dilution method. RESULTS The results showed that the overall prevalence of pathogenic bacteria in duck pens was 62.73. The highest isolation rate was detected in duck fecal droppings (100%), while Escherichia coli was found to be the most isolated pathogen (56.47%), followed by Pseudomonas aeruginosa (21.8%), Proteus mirabilis (15.29), and Salmonella species (6.47%). Multidrug resistance (MDR) was detected in the majority of bacterial isolates. The efficiency of CID 20 and Durak® plus disinfectants against all bacterial isolates was highly susceptible (100%) after 120 min of exposure time compared to the effectiveness of H2O2 on enteropathogenic bacteria which did not exceeded 60% at 5% concentration. Meanwhile, the sensitivity of Salmonella spp. to Durak® plus did not exceeded 80%. CONCLUSION The duck fecal droppings are the primary source of bacterial isolates. MDR isolates were susceptible to both CID 20 and Durak® plus disinfectants after 120 min of exposure time at a concentration of 1:100 ml. Besides, H2O2/ZnO NPs composite proved its lethal effect against all testing strains at 0.02 mg/ml after 120 min of exposure. Strict biosecurity guidelines are required to mitigate and prevent the transmission of potentially zoonotic pathogens through the farm environment and/or duck droppings.
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Affiliation(s)
- Gihan K. Abdel-Latef
- Department of Hygiene, Zoonoses and Epidemiology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
| | - Asmaa N. Mohammed
- Department of Hygiene, Zoonoses and Epidemiology, Faculty of Veterinary Medicine, Beni-Suef University, Beni-Suef, Egypt
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26
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Chen M, Qi J, Du Y, Cheng Z, Cai T, Li C. Rapid and accurate evaluation of vaporized hydrogen peroxide on the efficiency of disinfection, using a sensitive dual-channel laser scanning cytometer. BIOSAFETY AND HEALTH 2021. [DOI: 10.1016/j.bsheal.2020.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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27
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Ríos-Castillo AG, Ripolles-Avila C, Rodríguez-Jerez JJ. Evaluation of bacterial population using multiple sampling methods and the identification of bacteria detected on supermarket food contact surfaces. Food Control 2021. [DOI: 10.1016/j.foodcont.2020.107471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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28
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Huang J, Zhang S, Zhang S, Zhao Z, Cao Y, Chen M, Li B. A Comparative Study of Fluoroquinolone-Resistant Escherichia coli Lineages Portrays Indistinguishable Pathogenicity- and Survivability-Associated Phenotypic Characteristics Between ST1193 and ST131. Infect Drug Resist 2020; 13:4167-4175. [PMID: 33244246 PMCID: PMC7685377 DOI: 10.2147/idr.s277681] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Accepted: 10/19/2020] [Indexed: 12/12/2022] Open
Abstract
Background Sequence type 1193 is a new such lineage among fluoroquinolone-resistant Escherichia coli, which has risen dramatically within the last several years. However, reasons for rapid emergence and successful spread of E. coli ST1193 remain unclear. The aim of this study was to compare the pathogenicity and survivability features of E. coli ST1193 with global epidemic lineage, ST131. Methods A total of 30 E. coli were used in this study. Isolates were divided into two groups, ST1193 (n=15) and ST131 (n=15). Adhesion and invasion to T24 cells and resistance to serum were quantified and compared among two groups. Biofilm formation capacity was assessed by crystal violet assay. Macrocolony formation was assessed on macrocolony formation plates. Resistance to hydrogen peroxide was performed by broth microdilution. RAW264.7 cells were used to assess the anti-phagocytic function of different isolates. Results Adhesion and invasion assays revealed that E. coli ST1193 could adhere and invade T24 cells (p <0.05). 93.3% of E. coli ST1193 could form biofilms. The majority of E. coli ST1193 (66.7%) possessed no curli/no cellulose on macrocolony formation plates. E. coli ST1193 showed significant growth in serum and hydrogen peroxide and illustrated higher anti-phagocytic function to RAW264.7 cells (p <0.05). Group analysis showed that E. coli ST1193 was similar to ST131 in pathogenicity- and survivability-associated phenotypic characteristics (p >0.05). Conclusion Our study provided more insights into pathogenicity and survivability features of E. coli ST1193, which was similar to ST131. Our study could be of great importance in understanding the emergence of global spread E. coli ST1193. Strategic and continued surveillance should be carried out to prevent the infections caused by E. coli ST1193.
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Affiliation(s)
- Jiangqing Huang
- Department of Clinical Laboratory, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, People's Republic of China
| | - Shengcen Zhang
- Department of Clinical Laboratory, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, People's Republic of China
| | - Shuyu Zhang
- Department of Laboratory Medicine, Fujian Medical University, Fuzhou, Fujian 350001, People's Republic of China
| | - Zhichang Zhao
- Department of Pharmacy, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, People's Republic of China
| | - Yingping Cao
- Department of Clinical Laboratory, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, People's Republic of China
| | - Min Chen
- Department of Laboratory Medicine, Fujian Medical University, Fuzhou, Fujian 350001, People's Republic of China
| | - Bin Li
- Department of Clinical Laboratory, Fujian Medical University Union Hospital, Fuzhou, Fujian 350001, People's Republic of China
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29
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Javanbakht T, Laurent S, Stanicki D, Frenette M. Correlation between physicochemical properties of superparamagnetic iron oxide nanoparticles and their reactivity with hydrogen peroxide. CAN J CHEM 2020. [DOI: 10.1139/cjc-2020-0087] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study focuses on the effects of the physicochemical properties of superparamagnetic PEG-modified, positively charged, and negatively charged iron oxide nanoparticles (SPIONs) on their reactivity with hydrogen peroxide. Our hypothesis was that the reactivity of SPIONs in this reaction would depend on their surface properties. The comparative study of the nanoparticles with DLS and TEM revealed the average sizes of PEG-modified, positively charged, and negatively charged SPIONs. We observed that the reactivity of negatively charged SPIONs with hydrogen peroxide was less than that of positively charged SPIONs and that of these second nanoparticles was less than that of PEG-modified SPIONs. This difference in the reactivity of these SPIONs with hydrogen peroxide was attributed to the presence of carboxyl or amine groups on their surface. However, the values of the rate constants of the reactions of PEG-modified, positively charged, and negatively charged SPIONs with hydrogen peroxide showed that the reaction of negatively charged SPIONs with hydrogen peroxide was more rapid than that of PEG-modified SPIONs and the reaction of these second SPIONs with hydrogen peroxide was more rapid than that of positively charged SPIONs. The surface study of the SPIONs using XPS showed that the high-resolution spectra of these nanoparticles changed after reaction with hydrogen peroxide, which indicates their surface modifications. These investigations can help develop more appropriate nanoparticles with controlled physicochemical properties.
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Affiliation(s)
- Taraneh Javanbakht
- Department of Chemistry, Université du Québec à Montréal, Montreal, QC H2X 2J6, Canada
| | - Sophie Laurent
- Laboratory of NMR and Molecular Imaging, University of Mons, Mons B-7000, Belgium
- Center for Microscopy and Molecular Imaging (CMMI), Gosselies 6041, Belgium
| | - Dimitri Stanicki
- Laboratory of NMR and Molecular Imaging, University of Mons, Mons B-7000, Belgium
| | - Mathieu Frenette
- Department of Chemistry, Université du Québec à Montréal, Montreal, QC H2X 2J6, Canada
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30
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Yuan L, Sadiq FA, Wang N, Yang Z, He G. Recent advances in understanding the control of disinfectant-resistant biofilms by hurdle technology in the food industry. Crit Rev Food Sci Nutr 2020; 61:3876-3891. [DOI: 10.1080/10408398.2020.1809345] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Lei Yuan
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Faizan A. Sadiq
- School of Food Science and Technology, Jiangnan University, Wuxi, China
| | - Ni Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Zhenquan Yang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Guoqing He
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
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31
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Voorn MG, Goss SE, Nkemngong CA, Li X, Teska PJ, Oliver HF. Cross-contamination by disinfectant towelettes varies by product chemistry and strain. Antimicrob Resist Infect Control 2020; 9:141. [PMID: 32831143 PMCID: PMC7446058 DOI: 10.1186/s13756-020-00797-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2020] [Accepted: 08/05/2020] [Indexed: 12/02/2022] Open
Abstract
Background Disinfectant products are used frequently on environmental surfaces (e.g. medical equipment, countertops, patient beds) and patient care equipment within healthcare facilities. The purpose of this study was to assess the risk of cross-contamination of Staphylococcus aureus and Pseudomonas aeruginosa during and after disinfection of predetermined surface areas with ready-to-use (RTU) pre-wetted disinfectant towelettes. Methods This study tested six disinfectant towelette products against S. aureus ATCC CRM-6538 and P. aeruginosa strain ATCC-15442 on Formica surfaces. Each disinfectant was evaluated on a hard nonporous surface and efficacy was measured every 0.5 m2 using a modified version of EPA MLB SOP-MB-33 to study the risk of cross-contamination. Results We found that all of the wipes used in this study transferred S. aureus and P. aeruginosa from an inoculated surface to previously uncontaminated surfaces. Disinfectant towelettes with certain chemistries also retained a high level of viable bacteria after disinfection of the surface area. The cross-contamination risk also varied by product chemistry and bacterial strain. Conclusion Disinfectant wipes can cross-contaminate hard nonporous surfaces and retain viable bacterial cells post-disinfection, especially over larger surface areas. This highlights a need to further investigate the risk disinfectant wipes pose during and post-disinfection and guidance on maximum surface areas treated with a single towelette.
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Affiliation(s)
- Maxwell G Voorn
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN, 47907, USA
| | - Summer E Goss
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN, 47907, USA
| | - Carine A Nkemngong
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN, 47907, USA
| | - Xiaobao Li
- Diversey Inc., Charlotte, NC, 28273, USA
| | | | - Haley F Oliver
- Department of Food Science, Purdue University, 745 Agriculture Mall Drive, West Lafayette, IN, 47907, USA.
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32
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Fontecha-Umaña F, Ríos-Castillo AG, Ripolles-Avila C, Rodríguez-Jerez JJ. Antimicrobial Activity and Prevention of Bacterial Biofilm Formation of Silver and Zinc Oxide Nanoparticle-Containing Polyester Surfaces at Various Concentrations for Use. Foods 2020; 9:E442. [PMID: 32268566 PMCID: PMC7230149 DOI: 10.3390/foods9040442] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 12/13/2022] Open
Abstract
Food contact surfaces are primary sources of bacterial contamination in food industry processes. With the objective of preventing bacterial adhesion and biofilm formation on surfaces, this study evaluated the antimicrobial activity of silver (Ag-NPs) and zinc oxide (ZnO-NPs) nanoparticle-containing polyester surfaces (concentration range from 400 ppm to 850 ppm) using two kinds of bacteria, Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli), and the prevention of bacterial biofilm formation using the pathogen Listeria monocytogenes. The results of antimicrobial efficacy (reductions ≥ 2 log CFU/cm2) showed that at a concentration of 850 ppm, ZnO-NPs were effective against only E. coli (2.07 log CFU/cm2). However, a concentration of 400 ppm of Ag-NPs was effective against E. coli (4.90 log CFU/cm2) and S. aureus (3.84 log CFU/cm2). Furthermore, a combined concentration of 850 ppm Ag-NPs and 400 ppm ZnO-NPs showed high antimicrobial efficacy against E. coli (5.80 log CFU/cm2) and S. aureus (4.11 log CFU/cm2). The results also showed a high correlation between concentration levels and the bacterial activity of Ag-ZnO-NPs (R2 = 0.97 for S. aureus, and R2 = 0.99 for E. coli). They also showed that unlike individual action, the joint action of Ag-NPs and ZnO-NPs has high antimicrobial efficacy for both types of microorganisms. Moreover, Ag-NPs prevent the biofilm formation of L. monocytogenes in humid conditions of growth at concentrations of 500 ppm. Additional studies under different conditions are needed to test the durability of nanoparticle containing polyester surfaces with antimicrobial properties to optimize their use.
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Affiliation(s)
| | | | | | - José Juan Rodríguez-Jerez
- Departament de Ciència Animal i dels Aliments, Facultat de Veterinària, Universitat Autònoma de Barcelona, Travessera dels Turons s/n. Bellaterra, 08193 Barcelona, Spain; (F.F.-U.); (A.G.R.-C.); (C.R.-A.)
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Ripolles‐Avila C, Ríos‐Castillo AG, Fontecha‐Umaña F, Rodríguez‐Jerez JJ. Removal of
Salmonella enterica
serovar Typhimurium and
Cronobacter sakazakii
biofilms from food contact surfaces through enzymatic catalysis. J Food Saf 2020. [DOI: 10.1111/jfs.12755] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Carolina Ripolles‐Avila
- Area of Human Nutrition and Food Sciences, Departament de Ciència Animal i dels Aliments, Facultat de VeterinariaUniversitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), CP 08193 Barcelona Spain
| | - Abel G. Ríos‐Castillo
- Area of Human Nutrition and Food Sciences, Departament de Ciència Animal i dels Aliments, Facultat de VeterinariaUniversitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), CP 08193 Barcelona Spain
| | - Fabio Fontecha‐Umaña
- Area of Human Nutrition and Food Sciences, Departament de Ciència Animal i dels Aliments, Facultat de VeterinariaUniversitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), CP 08193 Barcelona Spain
| | - José J. Rodríguez‐Jerez
- Area of Human Nutrition and Food Sciences, Departament de Ciència Animal i dels Aliments, Facultat de VeterinariaUniversitat Autònoma de Barcelona, Bellaterra (Cerdanyola del Vallès), CP 08193 Barcelona Spain
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34
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Guerrero-Navarro AE, Ríos-Castillo AG, Ripolles-Avila C, Felipe X, Rodríguez-Jerez JJ. Microscopic analysis and microstructural characterization of the organic and inorganic components of dairy fouling during the cleaning process. J Dairy Sci 2020; 103:2117-2127. [PMID: 31928757 DOI: 10.3168/jds.2019-16957] [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: 05/13/2019] [Accepted: 11/13/2019] [Indexed: 01/09/2023]
Abstract
This study evaluated the organic residues of milk fouling using fluorescence and confocal laser scanning microscopy. The inorganic content was analyzed with energy-dispersive X-ray spectroscopy, complemented with inductively coupled plasma optical emission spectrometry. These techniques were applied to evaluate milk fouling cleanliness using an alkaline product and an enzymatic formulation based on protease and amylase. The results showed that the efficiency of enzymatic cleaning was 87.1% when it was evaluated at 55°C for 30 min, and with a medium of pH 8.5. No difference was found from the efficacy in eliminating dairy fouling observed for the chemical cleaning (86.9%). The fluorescence microscopy proved useful for determining the organic solid components in the outer layer of the dairy fouling. The fouling spatial disposition in 3 dimensions, obtained by confocal laser scanning microscopy, showed that it was formed of 51.3% sugars, 9.3% fats, and 39.4% proteins, with the enzymatic cleaning of these compounds being homogeneous, compared with chemical cleaning. The protein and lipid contents were in the surface layer, whereas sugars were located in the innermost part that contributes to the Maillard reaction during fouling formation. After enzymatic cleaning, the reduction in the concentration of Ca and P was 71.61 and 74.67%, respectively, compared with fouling intact. Thus, enzymatic cleaning, without the accumulation of Na from chemical cleaning, leaves 1.5 times less mineral than chemical cleaning. Knowing the content and structure of fouling in the industry helps to formulate better products to achieve proper levels of cleanliness. Additionally, studying the cleaning residues helps to avoid problems of cross-contamination between batches or subsequent microbial growths (biofilms) on surfaces with residues.
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Affiliation(s)
- Alfons Eduard Guerrero-Navarro
- Food Hygiene Unit, Veterinary Faculty, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, Cerdanyola del Vallès, 08193, Spain
| | - Abel Guillermo Ríos-Castillo
- Food Hygiene Unit, Veterinary Faculty, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, Cerdanyola del Vallès, 08193, Spain
| | - Carolina Ripolles-Avila
- Food Hygiene Unit, Veterinary Faculty, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, Cerdanyola del Vallès, 08193, Spain
| | - Xavier Felipe
- Institute of Agricultural-Alimentary Research and Technology-Monells, Finca Camps i Armet, Monells, 17121, Spain
| | - José Juan Rodríguez-Jerez
- Food Hygiene Unit, Veterinary Faculty, Universitat Autònoma de Barcelona, Travessera dels Turons s/n, Cerdanyola del Vallès, 08193, Spain.
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35
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Ermakov AV, Kudryavtseva VL, Demina PA, Verkhovskii RA, Zhang J, Lengert EV, Sapelkin AV, Goryacheva IY, Sukhorukov GB. Site-specific release of reactive oxygen species from ordered arrays of microchambers based on polylactic acid and carbon nanodots. J Mater Chem B 2020; 8:7977-7986. [DOI: 10.1039/d0tb01148g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Illustration of the laser-assisted release of hydrophilic H2O2 cargo from free-standing ordered arrays of biopolymer-based microchambers in a highly controlled manner.
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Affiliation(s)
- Alexey V. Ermakov
- N.G. Chernyshevsky Saratov State University
- Saratov 410012
- Russia
- I.M. Sechenov First Moscow State Medical University
- Moscow 119991
| | - Valeriya L. Kudryavtseva
- Queen Mary University of London
- London E1 4NS
- UK
- National Research Tomsk Polytechnic University, 30 Lenin Avenue
- Tomsk 634050
| | | | | | | | | | - Andrei V. Sapelkin
- N.G. Chernyshevsky Saratov State University
- Saratov 410012
- Russia
- Queen Mary University of London
- London E1 4NS
| | | | - Gleb B. Sukhorukov
- N.G. Chernyshevsky Saratov State University
- Saratov 410012
- Russia
- I.M. Sechenov First Moscow State Medical University
- Moscow 119991
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36
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Hygienic properties exhibited by single-use wood and plastic packaging on the microbial stability for fish. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108309] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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37
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Baiomi A, Patel H, Abbas H, Vootla V, Makker J. Chemical colitis caused by hydrogen peroxide vaginal douche: A case report. World J Gastrointest Endosc 2019; 11:486-490. [PMID: 31558970 PMCID: PMC6755081 DOI: 10.4253/wjge.v11.i9.486] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/09/2019] [Accepted: 08/27/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hydrogen peroxide is one of the most common household disinfectants worldwide. Hydrogen peroxide has been documented as a rare cause of chemical colitis.
CASE SUMMARY We present a case of 31 years old lady who presented to our hospital with rectal bleeding and abdominal pain after using hydrogen peroxide vaginal douche as an enema. She underwent colonoscopy which showed findings suggestive of chemical colitis and was managed conservatively. Hydrogen peroxide can induce chemical injury in the colon. Clinical presentation and endoscopic findings of chemical colitis are nonspecific. History taking is an important tool in identifying the underlying etiology. Review of literature showed few case reports, mostly were managed with oral antibiotics and conservative approach.
CONCLUSION Chemical colitis is usually managed conservatively. Complications including perforation, stricture and peritonitis may happen and need aggressive treatment accordingly.
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Affiliation(s)
- Ahmed Baiomi
- Department of Medicine, Division of Gastroenterology, Bronx Care Health System, 1650 Selwyn Ave, Bronx, NY 10457, United States
| | - Harish Patel
- Department of Medicine, Division of Gastroenterology, Bronx Care Health System, 1650 Selwyn Ave, Bronx, NY 10457, United States
| | - Hafsa Abbas
- Department of Medicine, Division of Gastroenterology, Bronx Care Health System, 1650 Selwyn Ave, Bronx, NY 10457, United States
| | - Vamshidhar Vootla
- Western Maryland Health System, 12500 Willowbrook Rd, Cumberland, MD 21502, United States
| | - Jasbir Makker
- Department of Medicine, Division of Gastroenterology, Bronx Care Health System, 1650 Selwyn Ave, Bronx, NY 10457, United States
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Ukuku DO, Mukhopadhyay S, Olanya OM, Niemira BA. Effect of cold storage on survivors and recovery of injured Salmonellabacteria on fresh‐cut pieces prepared from whole melons treated with heat and hydrogen peroxide. J FOOD PROCESS PRES 2019. [DOI: 10.1111/jfpp.13943] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Dike O. Ukuku
- Food Safety and Intervention Technologies Research Unit U.S. Department of Agriculture, Agriculture Research Service, Eastern Regional Research Center Wyndmoor Pennsylvania
| | - Sudarsan Mukhopadhyay
- Residue Chemistry and Predictive Microbiology Research Unit, U.S Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center Wyndmoor Pennsylvania
| | - Ocen M. Olanya
- Food Safety and Intervention Technologies Research Unit U.S. Department of Agriculture, Agriculture Research Service, Eastern Regional Research Center Wyndmoor Pennsylvania
| | - Brendan A. Niemira
- Food Safety and Intervention Technologies Research Unit U.S. Department of Agriculture, Agriculture Research Service, Eastern Regional Research Center Wyndmoor Pennsylvania
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39
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Long-term antibacterial efficacy of disinfectants based on benzalkonium chloride and sodium hypochlorite tested on surfaces against resistant gram-positive bacteria. Food Control 2018. [DOI: 10.1016/j.foodcont.2018.06.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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40
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Silva AF, Borges A, Giaouris E, Graton Mikcha JM, Simões M. Photodynamic inactivation as an emergent strategy against foodborne pathogenic bacteria in planktonic and sessile states. Crit Rev Microbiol 2018; 44:667-684. [PMID: 30318945 DOI: 10.1080/1040841x.2018.1491528] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Foodborne microbial diseases are still considered a growing public health problem worldwide despite the global continuous efforts to ensure food safety. The traditional chemical and thermal-based procedures applied for microbial growth control in the food industry can change the food matrix and lead to antimicrobial resistance. Moreover, currently applied disinfectants have limited efficiency against biofilms. Therefore, antimicrobial photodynamic therapy (aPDT) has become a novel alternative for controlling foodborne pathogenic bacteria in both planktonic and sessile states. The use of aPDT in the food sector is attractive as it is less likely to cause antimicrobial resistance and it does not promote undesirable nutritional and sensory changes in the food matrix. In this review, aspects on the antimicrobial photodynamic technology applied against foodborne pathogenic bacteria and studied in recent years are presented. The application of photodynamic inactivation as an antibiofilm strategy is also reviewed.
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Affiliation(s)
- Alex Fiori Silva
- a Postgraduate Program of Health Sciences , State University of Maringá , Maringá , Paraná , Brazil.,b LEPABE, Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal
| | - Anabela Borges
- b LEPABE, Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal
| | - Efstathios Giaouris
- c Department of Food Science and Nutrition, Faculty of the Environment , University of the Aegean , Lemnos , Greece
| | | | - Manuel Simões
- b LEPABE, Department of Chemical Engineering, Faculty of Engineering , University of Porto , Porto , Portugal
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41
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Le Toquin E, Faure S, Orange N, Gas F. New Biocide Foam Containing Hydrogen Peroxide for the Decontamination of Vertical Surface Contaminated With Bacillus thuringiensis Spores. Front Microbiol 2018; 9:2295. [PMID: 30319592 PMCID: PMC6171482 DOI: 10.3389/fmicb.2018.02295] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 09/07/2018] [Indexed: 01/23/2023] Open
Abstract
Despite scientific advances, bacterial spores remain a major preoccupation in many different fields, such as the hospital, food, and CBRN-E Defense sector. Although many disinfectant technologies exist, there is a lack for the decontamination of difficult to access areas, outdoor sites, or large interior volumes. This study evaluates the decontamination efficiency of an aqueous foam containing hydrogen peroxide, with the efficiency of disinfectant in the liquid form on vertical surfaces contaminated by Bacillus thurengiensis spores. The decontamination efficiency impact of the surfactant and stabilizer agents in the foam and liquid forms was evaluated. No interferences were observed with these two chemical additives. Our results indicate that the decontamination kinetics of both foam and liquid forms are similar. In addition, while the foam form was as efficient as the liquid solution at 4°C, it was even more so at 30°C. The foam decontamination reaction follows the Arrhenius law, which enables the decontamination kinetic to be predicted with the temperature. Moreover, the foam process used via spraying or filling is more attractive due to the generation of lower quantity of liquid effluents. Our findings highlight the greater suitability of foam to decontaminate difficult to access and high volume facilities compared to liquid solutions.
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Affiliation(s)
- Esther Le Toquin
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic, Service de Pharmacologie et Immunoanalyse, DRF, CEA, INRA, Bagnols-sur-Cèze, France.,Laboratoire de Microbiologie Signaux et Microenvironnement, Université de Rouen, Evreux, France
| | - Sylvain Faure
- Laboratoire des Procédés Supercritiques et Décontamination, Service d'études des technologies pour l'assainissement démantèlement et l'étanchéité, Univ. Montpellier, DEN, CEA, Bagnols-sur-Cèze, France
| | - Nicole Orange
- Laboratoire de Microbiologie Signaux et Microenvironnement, Université de Rouen, Evreux, France
| | - Fabienne Gas
- Laboratoire Innovations technologiques pour la Détection et le Diagnostic, Service de Pharmacologie et Immunoanalyse, DRF, CEA, INRA, Bagnols-sur-Cèze, France
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González-Rivas F, Ripolles-Avila C, Fontecha-Umaña F, Ríos-Castillo AG, Rodríguez-Jerez JJ. Biofilms in the Spotlight: Detection, Quantification, and Removal Methods. Compr Rev Food Sci Food Saf 2018; 17:1261-1276. [DOI: 10.1111/1541-4337.12378] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 06/07/2018] [Accepted: 06/14/2018] [Indexed: 12/14/2022]
Affiliation(s)
- Fabián González-Rivas
- Faculty of Health Sciences at Manresa; Univ. of Vic Central Univ. of Catalonia; Manresa Spain
| | - Carolina Ripolles-Avila
- Hygiene and Food Inspection Unit, Faculty of Veterinary Sciences; Dept. of Food and Animal Science, Univ. Autònoma de Barcelona; CP 08193 Barcelona Spain
| | - Fabio Fontecha-Umaña
- Hygiene and Food Inspection Unit, Faculty of Veterinary Sciences; Dept. of Food and Animal Science, Univ. Autònoma de Barcelona; CP 08193 Barcelona Spain
| | - Abel Guillermo Ríos-Castillo
- Hygiene and Food Inspection Unit, Faculty of Veterinary Sciences; Dept. of Food and Animal Science, Univ. Autònoma de Barcelona; CP 08193 Barcelona Spain
| | - José Juan Rodríguez-Jerez
- Hygiene and Food Inspection Unit, Faculty of Veterinary Sciences; Dept. of Food and Animal Science, Univ. Autònoma de Barcelona; CP 08193 Barcelona Spain
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Ripolles-Avila C, Ríos-Castillo AG, Rodríguez-Jerez JJ. Development of a peroxide biodetector for a direct detection of biofilms produced by catalase-positive bacteria on food-contact surfaces. CYTA - JOURNAL OF FOOD 2018. [DOI: 10.1080/19476337.2017.1418434] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Carolina Ripolles-Avila
- Hygiene and Food Inspection Unit, Department of Food and Animal Science, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Abel G. Ríos-Castillo
- Hygiene and Food Inspection Unit, Department of Food and Animal Science, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - José J. Rodríguez-Jerez
- Hygiene and Food Inspection Unit, Department of Food and Animal Science, Universitat Autònoma de Barcelona, Barcelona, Spain
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