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Nagaraj S, Sagaya JPJ, Anand J, Malairaj S, Lakshmaiah B, Sathya R, MubarakAli D. RETRACTED ARTICLE: A Cyanobacterium Treated Textile Wastewater for the Plant Growth Enhancement: Experimental Study. Appl Biochem Biotechnol 2024; 196:2397. [PMID: 35633432 DOI: 10.1007/s12010-022-03981-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/16/2022] [Indexed: 11/02/2022]
Affiliation(s)
- S Nagaraj
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, 600025, India.
| | - John Paul J Sagaya
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, 600025, India
| | - J Anand
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, 600025, India
| | - Sathuvan Malairaj
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, 600025, India
| | - Bhavani Lakshmaiah
- Centre for Advanced Studies in Botany, University of Madras, Guindy Campus, Chennai, 600025, India
| | - R Sathya
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai, 600048, India
| | - D MubarakAli
- School of Life Sciences, B.S. Abdur Rahman Crescent Institute of Science and Technology, Chennai, 600048, India.
- Al Siraat Labs Private Limited, CIIC, Seethakathi Estate, Chennai, 600048, India.
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2
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Xu Q, Wang X, Wang Y, Zhang Y. Smart Janus cotton fabrics prepared via mist polymerization for moisture and thermal management. Int J Biol Macromol 2024; 265:130929. [PMID: 38508548 DOI: 10.1016/j.ijbiomac.2024.130929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/11/2024] [Accepted: 03/14/2024] [Indexed: 03/22/2024]
Abstract
The construction of Janus structures on cotton fabrics can endow the fabrics with dynamic multifunctional properties. However, because of the large pores between fabric fibers, the formation of Janus structures by grafting different functional coatings on the double surfaces of cotton fabrics via dipping technology is difficult. To construct Janus structures on cotton fabrics, mist polymerization and "grafting-through" polymerization technologies were used to graft polylauryl methacrylate and a heat-shrinkable thermosensitive antibacterial polymer on the inside and outside surfaces of the cotton fabric, respectively. The as-formed Janus cotton fabric demonstrated excellent antibacterial durability. Even after subjecting the Janus fabric to 70 laundering cycles, its bacterial rates against Escherichia coli and Staphylococcus aureus were > 93.0 %. Compared with the pristine cotton fabric, when the ambient temperature is high or low, the Janus fabric can adjust the skin temperature within 5 min by approximately ±3.0 °C. Additionally, the fabric exhibited excellent waterproof and moisture permeability properties. The Janus cotton fabrics prepared by the proposed strategy possess significant potential for applications in the field of wearable textiles.
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Affiliation(s)
- Qingbo Xu
- Key Laboratory of Textile Fabric, College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, Anhui 241000, China; School of Materials Science and Engineering, Zhejiang Sci-Tech University, Xiasha Higher Education Zone, Hangzhou 310018, China.
| | - Xinyu Wang
- Key Laboratory of Textile Fabric, College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Yong Wang
- Key Laboratory of Textile Fabric, College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, Anhui 241000, China
| | - Yanyan Zhang
- Key Laboratory of Textile Fabric, College of Textiles and Clothing, Anhui Polytechnic University, Wuhu, Anhui 241000, China.
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3
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Wu L, Fan B, Yan B, Liu Y, Yu Y, Cui L, Zhou M, Wang Q, Wang P. Construction of durable antibacterial cellulose textiles through grafting dynamic disulfide-containing amino-compound and nanosilver deposition. Int J Biol Macromol 2024; 259:129085. [PMID: 38163508 DOI: 10.1016/j.ijbiomac.2023.129085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 12/06/2023] [Accepted: 12/16/2023] [Indexed: 01/03/2024]
Abstract
Cotton textile is very comfortable to wear, and also provides an ideal environment for bacterial propagation, easily causing harm to human health. In order to address this issue, various antibacterial techniques are employed for cotton finishing. However, some processes are complex and involve the use of environmentally unfriendly chemicals. In this work, a durable and efficient antibacterial cotton fabric was prepared via grafting of an amino-compound containing dynamic disulfide bonds, and then in-situ deposition of silver nanoparticles (AgNPs). Briefly, the reactive α-lipoic acid-modified polyethyleneimine (mPEI) was introduced to the cotton fibers via thiol-ene click reaction. Subsequently, the amino groups and dynamically-generated sulfhydryl groups in the mPEI molecules were used to initiate the ultrafast reduction of silver ions without the participation of additional reductant, constructing a stable antibacterial layer on fiber surface. The results reveal that the amino and thiol groups of mPEI could form coordination bonds with the deposited silver nanoparticles, and the antibacterial ability of AgNP@cotton-g-mPEI fabric remains at a high level even after 20 washing cycles. After 30 min of contact with Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus), the antibacterial rates against both bacteria reached 99.99 %. Meanwhile, the network matrix constructed by the recombination of the dynamic disulfide bonds in mPEI endows the cotton fabric with detectable wrinkle resistance and encouraging anti-ultraviolet effect. The present work provides a novel alternative for preparation of durable and efficient antibacterial textiles.
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Affiliation(s)
- Leilei Wu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Bingjie Fan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Biaobiao Yan
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Ying Liu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Li Cui
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Man Zhou
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Ping Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, Wuxi 214122, China.
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4
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Zhang N, Xu Y, Shi R, Zhou M, Yu Y, Wang P, Wang Q. Protein-based coating strategy for preparing durable sunlight-driven rechargeable antibacterial, super hydrophilic, and UV-resistant textiles. Int J Biol Macromol 2024; 258:128761. [PMID: 38101656 DOI: 10.1016/j.ijbiomac.2023.128761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Revised: 12/04/2023] [Accepted: 12/10/2023] [Indexed: 12/17/2023]
Abstract
With the improvement of the hygiene awareness and pathogen prevention awareness of patients and medical staff, textiles with efficient and long-lasting pathogen inactivation effects are urgently needed. Photodynamic therapy (PDT) has rapidly developed into a new type of antibacterial technology due to its high antibacterial activity and has received widespread attention. However, the commonly used photosensitizers are mostly inorganic nanomaterials, which have poor adhesion to textiles and are not environmentally or human friendly. Here, we report a strategy of preparation of a sunlight-driven rechargeable antibacterial textiles based on natural antibacterial agents, which can work in light and dark conditions. The prepared BD-PTL@wool has long-lasting antibacterial properties, can rapidly produce ROS, and can store sterilization activity under light irradiation, ensuring all-day bacterial killing (>99.95 % under light irradiation and >99.80 % under dark conditions after light irradiation). BD-PTL@wool has excellent reusability, and the antibacterial rate can still above 95 % after repeated use for 5 times. In addition, BD-PTL@wool has excellent hydrophilic, UV resistance, biocompatibility and can withstand 50 washing cycles. The successful application of this strategy in textile preparation broadens the research idea for exploring the application of green photosensitive antibacterial materials in textile field.
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Affiliation(s)
- Ning Zhang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China
| | - Yujie Xu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China
| | - Rongjin Shi
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China
| | - Man Zhou
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China
| | - Yuanyuan Yu
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China
| | - Ping Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China
| | - Qiang Wang
- Key Laboratory of Science and Technology of Eco-Textile, Ministry of Education, Jiangnan University, 1800 Lihu Ave, Wuxi 214122, Jiangsu, China.
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5
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Meier P, Clement P, Altenried S, Reina G, Ren Q, Züst R, Enger O, Choi F, Nestle N, Deisenroth T, Neubauer P, Wick P. Quaternary ammonium-based coating of textiles is effective against bacteria and viruses with a low risk to human health. Sci Rep 2023; 13:20556. [PMID: 37996620 PMCID: PMC10667359 DOI: 10.1038/s41598-023-47707-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023] Open
Abstract
While the global healthcare system is slowly recovering from the COVID-19 pandemic, new multi-drug-resistant pathogens are emerging as the next threat. To tackle these challenges there is a need for safe and sustainable antiviral and antibacterial functionalized materials. Here we develop an 'easy-to-apply' procedure for the surface functionalization of textiles, rendering them antiviral and antibacterial and assessing the performance of these textiles. A metal-free quaternary ammonium-based coating was applied homogeneously and non-covalently to hospital curtains. Abrasion, durability testing, and aging resulted in little change in the performance of the treated textile. Additionally, qualitative and quantitative antibacterial assays on Staphylococcus aureus, Pseudomonas aeruginosa, and Acinetobacter baumanii revealed excellent antibacterial activity with a CFU reduction of 98-100% within only 4 h of exposure. The treated curtain was aged 6 months before testing. Similarly, the antiviral activity tested according to ISO-18184 with murine hepatitis virus (MHV) showed > 99% viral reduction with the functionalized curtain. Also, the released active compounds of the coating 24 ± 5 µg mL-1 revealed no acute in vitro skin toxicity (IC50: 95 µg mL-1) and skin sensitization. This study emphasizes the potential of safe and sustainable metal-free textile coatings for the rapid antiviral and antibacterial functionalization of textiles.
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Affiliation(s)
- Philipp Meier
- Particles-Biology Interactions Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland
| | - Pietro Clement
- Particles-Biology Interactions Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland
| | - Stefanie Altenried
- Biointerfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland
| | - Giacomo Reina
- Particles-Biology Interactions Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland
| | - Qun Ren
- Biointerfaces Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland
| | - Roland Züst
- Federal Office for Civil Protection FOCP, Spiez Laboratory, 3700, Spiez, Switzerland
| | - Olivier Enger
- Technology Scouting & Incubation, BASF Schweiz AG, 4005, Basel, Switzerland
| | - Francis Choi
- BASF Corporation, 1609 Biddle Avenue, Wyandotte, MI, 48192, USA
| | - Nikolaus Nestle
- BASF SE, Carl-Bosch-Strasse 38, 67056, Ludwigshafen am Rhein, Germany
| | - Ted Deisenroth
- Formulation Research, BASF Corporation, 500 White Plains Road, Tarrytown, NY, 10591, USA
| | - Peter Neubauer
- Chair of Bioprocess Engineering, Institute of Biotechnology, TU Berlin, 13355, Berlin, Germany
| | - Peter Wick
- Particles-Biology Interactions Laboratory, Empa-Swiss Federal Laboratories for Materials Science and Technology, 9014, St. Gallen, Switzerland.
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6
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Das P, Sherazee M, Marvi PK, Ahmed SR, Gedanken A, Srinivasan S, Rajabzadeh AR. Waste-Derived Sustainable Fluorescent Nanocarbon-Coated Breathable Functional Fabric for Antioxidant and Antimicrobial Applications. ACS Appl Mater Interfaces 2023; 15:29425-29439. [PMID: 37279206 DOI: 10.1021/acsami.3c03778] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hospital-acquired (nosocomial) infections account for the majority of adverse health effects during care delivery, placing an immense financial strain on healthcare systems around the world. For the first time, the present article provides evidence of a straightforward pollution-free technique to fabricate a heteroatom-doped carbon dot immobilized fluorescent biopolymer composite for the development of functional textiles with antioxidant and antimicrobial properties. A simple, facile, and eco-friendly approach was devised to prepare heteroatom-doped carbon dots from waste green tea and a biopolymer. The carbon dots showed an excitation-dependent emission behavior, and the XPS data unveiled that they are co-doped with nitrogen and sulfur. A facile physical compounding strategy was adopted to fabricate a carbon dot reinforced biopolymeric composite followed by immobilization onto the textile. The composite textiles revealed excellent antioxidant activity, determined by 1,1-diphenyl-2-picrylhydrazyl (>80%) and 2,2'-azinobis-3-ethylbenzothiazoline-6-sulfonic acid assays (>90%). The results of the disc diffusion assay indicated that the composite textiles substantially inhibited the growth of both tested bacteria Escherichia coli and Bacillus subtilis with increasing coating cycles. The time-dependent antibacterial experiments revealed that the nanocomposite can inhibit significant bacterial growth within a few hours. The present study could open up the possibility for the commercialization of inexpensive smart textile substrates for the prevention of microbial contamination used for the medical and healthcare field.
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Affiliation(s)
- Poushali Das
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Masoomeh Sherazee
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Parham Khoshbakht Marvi
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
| | - Syed Rahin Ahmed
- W Booth School of Engineering Practice and Technology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Aharon Gedanken
- Bar-Ilan Institute for Nanotechnology and Advanced Materials (BINA), Department of Chemistry, Bar-Ilan University, Ramat-Gan 5290002, Israel
| | - Seshasai Srinivasan
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
- W Booth School of Engineering Practice and Technology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
| | - Amin Reza Rajabzadeh
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON L8S 4L8, Canada
- W Booth School of Engineering Practice and Technology, McMaster University, 1280 Main Street West, Hamilton, Ontario L8S 4L7, Canada
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7
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Subair S, Singh N, Maru M, Prakash S, Hasanar M. An Antimicrobial Fabric Using Nano-Herbal Encapsulation of Essential Oils. J Vis Exp 2023. [PMID: 37092818 DOI: 10.3791/65187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/25/2023] Open
Abstract
Lab coats are widely used in biohazard laboratories and healthcare facilities as protective garments to prevent direct exposure to pathogens, spills, and burns. These cotton-based protective coats provide ideal conditions for microbial growth and attachment sites due to their porous nature, moisture-holding capacity, and retention of warmth from the user's body. Several studies have demonstrated the survival of pathogenic bacteria on hospital garments and lab coats, acting as vectors of microbial transmission. A common approach to fix these problems is the application of antimicrobial agents in textile finishing, but concerns have been raised due to the toxicity and environmental effects of many synthetic chemicals. The ongoing pandemic has also opened a window for the investigation of effective antimicrobials and eco-friendly and toxic-free formulations. This study uses two natural bioactive compounds, carvacrol and thymol, encapsulated in chitosan nanoparticles, which guarantee effective protection against four human pathogens with up to a 4-log reduction (99.99%). These pathogens are frequently detected in lab coats used in biohazard laboratories. The treated fabrics also resisted up to 10 wash cycles with 90% microbial reduction, which is sufficient for the intended use. We made modifications to the existing standard fabric tests to better represent the typical scenarios of lab coat usage. These refinements allow for a more accurate evaluation of the effectiveness of antimicrobial lab coats and for the simulation of the fate of any accidental microbial spills that must be neutralized within a short time. Further studies are recommended to investigate the accumulation of pathogens over time on antimicrobial lab coats compared to regular protective coats.
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Affiliation(s)
- Siyam Subair
- School of Engineering Technology and Applied Sciences (SETAS), Centennial College;
| | - Natasha Singh
- School of Engineering Technology and Applied Sciences (SETAS), Centennial College
| | - Megha Maru
- School of Engineering Technology and Applied Sciences (SETAS), Centennial College
| | - Sangeetha Prakash
- School of Engineering Technology and Applied Sciences (SETAS), Centennial College
| | - Mohamed Hasanar
- School of Engineering Technology and Applied Sciences (SETAS), Centennial College
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8
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Qian J, Dong Q, Chun K, Zhu D, Zhang X, Mao Y, Culver JN, Tai S, German JR, Dean DP, Miller JT, Wang L, Wu T, Li T, Brozena AH, Briber RM, Milton DK, Bentley WE, Hu L. Highly stable, antiviral, antibacterial cotton textiles via molecular engineering. Nat Nanotechnol 2023; 18:168-176. [PMID: 36585515 DOI: 10.1038/s41565-022-01278-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Accepted: 10/27/2022] [Indexed: 05/25/2023]
Abstract
Cotton textiles are ubiquitous in daily life and are also one of the primary mediums for transmitting viruses and bacteria. Conventional approaches to fabricating antiviral and antibacterial textiles generally load functional additives onto the surface of the fabric and/or their microfibres. However, such modifications are susceptible to deterioration after long-term use due to leaching of the additives. Here we show a different method to impregnate copper ions into the cellulose matrix to form a copper ion-textile (Cu-IT), in which the copper ions strongly coordinate with the oxygen-containing polar functional groups (for example, hydroxyl) of the cellulose chains. The Cu-IT displays high antiviral and antibacterial performance against tobacco mosaic virus and influenza A virus, and Escherichia coli, Salmonella typhimurium, Pseudomonas aeruginosa and Bacillus subtilis bacteria due to the antimicrobial properties of copper. Furthermore, the strong coordination bonding of copper ions with the hydroxyl functionalities endows the Cu-IT with excellent air/water retainability and superior mechanical stability, which can meet daily use and resist repeated washing. This method to fabricate Cu-IT is cost-effective, ecofriendly and highly scalable, and this textile appears very promising for use in household products, public facilities and medical settings.
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Affiliation(s)
- Ji Qian
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Qi Dong
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Kayla Chun
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD, USA
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA
| | - Dongyang Zhu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Xin Zhang
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Yimin Mao
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
- NIST Center for Neutron Research, National Institute of Standards and Technology (NIST), Gaithersburg, MD, USA
| | - James N Culver
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD, USA
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA
| | - Sheldon Tai
- Maryland Institute for Applied Environmental Health, University of Maryland, College Park, MD, USA
| | - Jennifer R German
- Maryland Institute for Applied Environmental Health, University of Maryland, College Park, MD, USA
| | - David P Dean
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA
| | - Jeffrey T Miller
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN, USA
| | - Liguang Wang
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Tianpin Wu
- X-ray Science Division, Argonne National Laboratory, Lemont, IL, USA
| | - Tian Li
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Alexandra H Brozena
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Robert M Briber
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA
| | - Donald K Milton
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, MD, USA
| | - William E Bentley
- Fischell Department of Bioengineering, University of Maryland, College Park, MD, USA.
- Institute for Bioscience and Biotechnology Research, University of Maryland, College Park, MD, USA.
- Robert E. Fischell Institute for Biomedical Devices, University of Maryland, College Park, MD, USA.
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD, USA.
- Center for Materials Innovation, University of Maryland, College Park, MD, USA.
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9
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Oh JH, Martinez AD, Cao H, George GW, Cobb JS, Sharma P, Fassero LA, Arole K, Carr MA, Lovell KM, Shukla J, Saed MA, Tandon R, Marquart ME, Moores LC, Green MJ. Radio Frequency Heating of Washable Conductive Textiles for Bacteria and Virus Inactivation. ACS Appl Mater Interfaces 2022; 14:43732-43740. [PMID: 36121103 DOI: 10.1021/acsami.2c11493] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The ongoing COVID-19 pandemic has increased the use of single-use medical fabrics such as surgical masks, respirators, and other personal protective equipment (PPE), which have faced worldwide supply chain shortages. Reusable PPE is desirable in light of such shortages; however, the use of reusable PPE is largely restricted by the difficulty of rapid sterilization. In this work, we demonstrate successful bacterial and viral inactivation through remote and rapid radio frequency (RF) heating of conductive textiles. The RF heating behavior of conductive polymer-coated fabrics was measured for several different fabrics and coating compositions. Next, to determine the robustness and repeatability of this heating response, we investigated the textile's RF heating response after multiple detergent washes. Finally, we show a rapid reduction of bacteria and virus by RF heating our conductive fabric. 99.9% of methicillin-resistant Staphylococcus aureus (MRSA) was removed from our conductive fabrics after only 10 min of RF heating; human cytomegalovirus (HCMV) was completely sterilized after 5 min of RF heating. These results demonstrate that RF heating conductive polymer-coated fabrics offer new opportunities for applications of conductive textiles in the medical and/or electronic fields.
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Affiliation(s)
- Ju Hyun Oh
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas77843, United States
| | - Aimee D Martinez
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas77843, United States
| | - Huaixuan Cao
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas77843, United States
| | - Garrett W George
- U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, Mississippi39180, United States
| | - Jared S Cobb
- U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, Mississippi39180, United States
| | - Poonam Sharma
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
| | - Lauren A Fassero
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
| | - Kailash Arole
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas77843, United States
| | - Mary A Carr
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
| | - K Michael Lovell
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
| | - Jayanti Shukla
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
| | - Mohammad A Saed
- Department of Electrical and Computer Engineering, Texas Tech University, Lubbock, Texas79409, United States
| | - Ritesh Tandon
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
- Department of Medicine, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
- Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, Oxford, Mississippi38655, United States
| | - Mary E Marquart
- Department of Microbiology and Immunology, University of Mississippi Medical Center, Jackson, Mississippi39216, United States
| | - Lee C Moores
- U.S. Army Engineer Research and Development Center, 3909 Halls Ferry Road, Vicksburg, Mississippi39180, United States
| | - Micah J Green
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas77843, United States
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10
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Akinbobola AB, Osunla AC, Bello OM, Ajayi OA. Study of the persistence of selected Gram-negative bacteria pathogens of healthcare-associated infections on hospital fabrics. Am J Infect Control 2022; 50:755-757. [PMID: 34883159 DOI: 10.1016/j.ajic.2021.11.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2021] [Revised: 11/25/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND The ability of healthcare associate infection (HAI) pathogens to persist on fomites is crucial to their transmission within the healthcare setting, this study evaluated the persistence of 3 common HAI pathogens on fabrics materials commonly used in healthcare settings. METHODS Persistence of bacteria species on fabric was investigate by inoculating standardized inoculum prepared from the clinical isolates of Pseudomonas aeruginosa, Escherichia coli and Acinetobacter baumannii on sterile swatches of 100% cotton, microfiber and polyester. Viable bacteria persisting on the inoculated fabrics were evaluated immediate after inoculation and subsequently at 96-hour interval for 32 days using the drop plate technique. The effect of moisture on the persistence of the studied bacteria isolates was also evaluated. RESULTS Between 3 and 6 log reduction in the viability of the inoculated bacteria cells were observed after 32 days of inoculation on fabrics. Generally, lower viable cells were recovered from the microfiber fabrics compared to others, while higher viable cells were recovered from wet fabrics compared to the dry fabrics in this study. DISCUSSION AND CONCLUSIONS This study demonstrated that HAI bacteria pathogens can persist for more than a month on hospital fabrics, and that their persistence can be enhanced by moisture.
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Affiliation(s)
- Ayorinde B Akinbobola
- Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria.
| | - Ayodeji C Osunla
- Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria
| | - Oluyemi M Bello
- Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria
| | - Olajide A Ajayi
- Department of Microbiology, Adekunle Ajasin University, Akungba-Akoko, Ondo State, Nigeria; Centre for Infectious Disease Control and Drug Development (CIDCDD), Adekunle Ajasin University Akungba-Akoko, Ondo State, Nigeria
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11
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Monleón-Getino T, Cavalleri M. International ring trial to validate a new method for testing the antimicrobial efficacy of domestic laundry products. PLoS One 2022; 17:e0269556. [PMID: 35658049 PMCID: PMC9165900 DOI: 10.1371/journal.pone.0269556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Accepted: 05/23/2022] [Indexed: 11/18/2022] Open
Abstract
Due to greater environmental awareness, domestic laundry habits are changing, and antimicrobial control by chemical methods has become an essential factor to compensate for the use of lower temperatures during washing machine cycles. Disinfectants added to laundry detergents are a preventive strategy to reduce the transmission of bacteria, fungi, and viruses in the home, correct aesthetic damage (e.g., spotting, discolouration, and staining), and control the microbial contamination that leads to malodour. In Europe, disinfectants are regulated by the EU Biocidal Products Regulation (No. 528/2012), which stipulates that antimicrobial efficacy must be evaluated according to standardized methods. Current European standards for laundry sanitization only apply to clinical settings (EN 16616: 2015) and are restricted to the main wash cycle. Therefore, there is a gap in the EU standards regarding the testing of product efficacy in household laundering. With the aim of addressing this gap, an international ring trial was organized to evaluate the robustness of a new method (prEN 17658) designed to test the efficacy of antimicrobial laundry products in a domestic setting. The seven participating laboratories were equipped with 5 different laboratory-scale devices to simulate the washing process, and they evaluated 7 microbial parameters for 2 experimental conditions and 3 levels of active substance. The analysis of data according to ISO 5725–2 and ISO 13528 demonstrated that the method was robust. All reproducibility standard deviation values were between 0.00 and 1.40 and the relative standard deviation indicates satisfactory reproducibility. Values of logarithmic reduction ranged from less than 2 log10 for tests with water to more than 5 log10 when disinfectants were added. The evidence generated by the ring trial was presented in a proposal for a standardized method under CEN/TC 216, in which the SOP used in the ring trial is referred to as the prEN 17658 phase 2 step 2 test method covering chemothermal textile disinfection in domestic settings.
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Affiliation(s)
- Toni Monleón-Getino
- Department of Genetics, Microbiology and Statistics, Section of Statistics, University of Barcelona, Barcelona, Spain
- GRBIO, Research Group in Biostatistics and Bioinformatics, Barcelona, Spain
- BIOST, Research Group in Clinical Statistics, Bioinformatics and Computational Biodiversity, Barcelona Spain
- * E-mail:
| | - Michele Cavalleri
- European Committee for Standardisation, CEN/TC 216/WG 3 Food Hygiene and Domestic and Institutional Use, Brussels, Belgium
- Eurofins Biolab SRL, Vimodrone (Milano), Italy
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12
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Onyszko M, Markowska-Szczupak A, Rakoczy R, Paszkiewicz O, Janusz J, Gorgon-Kuza A, Wenelska K, Mijowska E. The cellulose fibers functionalized with star-like zinc oxide nanoparticles with boosted antibacterial performance for hygienic products. Sci Rep 2022; 12:1321. [PMID: 35079098 PMCID: PMC8789781 DOI: 10.1038/s41598-022-05458-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 01/12/2022] [Indexed: 12/16/2022] Open
Abstract
Bacterial infectious diseases are serious health problem which extends to economic and social complications. Moreover, bacterial antibiotic resistance, lack of suitable vaccine or emergence of new mutations is forcing the development of novel antimicrobial agents. The objective of this study is to synthesize and characterize star-like zinc oxide nanoparticles for the application of antibacterial activities in cellulose based hygiene products. ZnO NPs were in situ synthesized via precipitation method on the surface of cellulose fibers. Since bactericidal activity of nanoparticles in part depends on the concentration in the growth medium, various amount of ZnO was incorporated into cellulose matrix ranging from 1 to 3 wt%. Microscopic (TEM, SEM) and spectroscopic (FT-IR, XRD) methods were utilized to investigate the final products. The infrared absorption spectra analysis supported by theoretical finding that during the reaction, ZnO nanoparticles could be bonded with cellulose fibers via hydrogen bonding. The yield of functionalization was determined through thermogravimetric analysis. Collected data proved the successful functionalization of the cellulose fibers with nanoparticles. Static contact angle measurements were carried out showing absorptive character of as prepared fabrics. All the samples were tested for the antibacterial properties and the results were compared to the samples prepared from the pristine cellulose fibers. Moreover, mechanical tests were performed revealing that the addition of only 2 wt% of the nanofiller boosted tensile, tearing and bursting strength by a factor of 1.6, 1.4 and 2.2 in comparison to unfunctionalized paper sample, respectively. Fabricated fabric presenting high hydrophilicity and antibacterial properties have gained increased applications in fabric industry, including hygiene product industry and hence the result of this study would be a welcomed option.
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Affiliation(s)
- M Onyszko
- Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065, Szczecin, Poland
| | - A Markowska-Szczupak
- Department of Chemical and Process Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065, Szczecin, Poland
| | - R Rakoczy
- Department of Chemical and Process Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065, Szczecin, Poland
| | - O Paszkiewicz
- Department of Chemical and Process Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065, Szczecin, Poland
| | - J Janusz
- Arctic Paper Kostrzyn SA, ul. Fabryczna 1, 66-470, Kostrzyn nad Odra, Poland
| | - A Gorgon-Kuza
- Arctic Paper Kostrzyn SA, ul. Fabryczna 1, 66-470, Kostrzyn nad Odra, Poland
| | - K Wenelska
- Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065, Szczecin, Poland.
| | - E Mijowska
- Department of Nanomaterials Physicochemistry, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, Szczecin, Piastow Ave. 42, 71-065, Szczecin, Poland
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13
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Andra S, Balu SK, Jeevanandam J, Muthalagu M. Emerging nanomaterials for antibacterial textile fabrication. Naunyn Schmiedebergs Arch Pharmacol 2021; 394:1355-1382. [PMID: 33710422 DOI: 10.1007/s00210-021-02064-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Accepted: 02/08/2021] [Indexed: 12/16/2022]
Abstract
In recent times, the search for innovative material to fabricate smart textiles has been increasing to satisfy the expectation and needs of the consumers, as the textile material plays a key role in the evolution of human culture. Further, the textile materials provide an excellent environment for the microbes to grow, because of their large surface area and ability to retain moisture. In addition, the growth of harmful bacteria on the textile material not only damages them but also leads to intolerable foul odour and significant danger to public health. In particular, the pathogenic bacteria present in the fabric surface can cause severe skin infections such as skin allergy and irritation via direct human contact and even can lead to heart problems and pneumonia in certain cases. Recently, nanoparticles and nanomaterials play a significant role in textile industries for developing functional smart textiles with self-cleaning, UV-protection, insect repellent, waterproof, anti-static, flame-resistant and antimicrobial-resistant properties. Thus, this review is an overview of various textile fibres that favour bacterial growth and potential antibacterial nanoparticles that can inhibit the growth of bacteria on fabric surfaces. In addition, the probable antibacterial mechanism of nanoparticles and the significance of the fabric surface modification and fabric finishes in improving the long-term antibacterial efficacy of nanoparticle-coated fabrics were also discussed.
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Affiliation(s)
- Swetha Andra
- Department of Textile Technology, Anna University, Chennai, India
| | | | - Jaison Jeevanandam
- CQM-Centro de Química da Madeira, MMRG, Universidade da Madeira, Campus da Penteada, 9020-105, Funchal, Portugal
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14
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Biagiotti G, Salvatore A, Toniolo G, Caselli L, Di Vito M, Cacaci M, Contiero L, Gori T, Maggini M, Sanguinetti M, Berti D, Bugli F, Richichi B, Cicchi S. Metal-Free Antibacterial Additives Based on Graphene Materials and Salicylic Acid: From the Bench to Fabric Applications. ACS Appl Mater Interfaces 2021; 13:26288-26298. [PMID: 34038082 PMCID: PMC8289172 DOI: 10.1021/acsami.1c02330] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The custom functionalization of a graphene surface allows access to engineered nanomaterials with improved colloidal stability and tailored specific properties, which are available to be employed in a wide range of applications ranging from materials to life science. The high surface area and their intrinsic physical and biological properties make reduced graphene oxide and graphene oxide unique materials for the custom functionalization with bioactive molecules by exploiting different surface chemistries. In this work, preparation (on the gram scale) of reduced graphene oxide and graphene oxide derivatives functionalized with the well-known antibacterial agent salicylic acid is reported. The salicylic acid functionalities offered a stable colloidal dispersion and, in addition, homogeneous absorption on a sample of textile manufacture (i.e., cotton fabrics), as shown by a Raman spectroscopy study, thus providing nanoengineered materials with significant antibacterial activity toward different strains of microorganisms. Surprisingly, graphene surface functionalization also ensured resistance to detergent washing treatments as verified on a model system using the quartz crystal microbalance technique. Therefore, our findings paved the way for the development of antibacterial additives for cotton fabrics in the absence of metal components, thus limiting undesirable side effects.
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Affiliation(s)
- Giacomo Biagiotti
- Department
of Chemistry “Ugo Schiff”, Università di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- INSTM
(Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia
dei Materiali), Via G.
Giusti, 9, 50121 Firenze, Italy
| | - Annalisa Salvatore
- CSGI
(Italian Center for Colloid and Surface Science, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Gianluca Toniolo
- Department
of Chemistry “Ugo Schiff”, Università di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- INSTM
(Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia
dei Materiali), Via G.
Giusti, 9, 50121 Firenze, Italy
| | - Lucrezia Caselli
- Department
of Chemistry “Ugo Schiff”, Università di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- CSGI
(Italian Center for Colloid and Surface Science, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Maura Di Vito
- Dipartimento
di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Dipartimento
di Scienze e Tecnologie Agro-Alimentari, Università di Bologna, Viale G. Fanin 42, 40127 Bologna, Italy
| | - Margherita Cacaci
- Dipartimento
di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Dipartimento
di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Luca Contiero
- Cromology
Italia S.p.A., Via IV Novembre, 4, 55016 Z.I. Porcari, Lucca, Italy
| | - Tommaso Gori
- Beste
S.p.A., Via Primo Levi,
6, 59022 Colle Cantagallo, Prato, Italy
| | - Michele Maggini
- Dipartimento
di Scienze Chimiche, Università degli
Studi di Padova, Via
Marzolo 1, 35131 Padova, Italy
| | - Maurizio Sanguinetti
- Dipartimento
di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Dipartimento
di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Debora Berti
- Department
of Chemistry “Ugo Schiff”, Università di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- CSGI
(Italian Center for Colloid and Surface Science, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
| | - Francesca Bugli
- Dipartimento
di Scienze Biotecnologiche di Base, Cliniche Intensivologiche e Perioperatorie, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
- Dipartimento
di Scienze di Laboratorio e Infettivologiche, Fondazione Policlinico Universitario A. Gemelli IRCCS, 00168 Rome, Italy
| | - Barbara Richichi
- Department
of Chemistry “Ugo Schiff”, Università di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- INSTM
(Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia
dei Materiali), Via G.
Giusti, 9, 50121 Firenze, Italy
| | - Stefano Cicchi
- Department
of Chemistry “Ugo Schiff”, Università di Firenze, Via della Lastruccia 3-13, 50019 Sesto Fiorentino, Italy
- INSTM
(Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia
dei Materiali), Via G.
Giusti, 9, 50121 Firenze, Italy
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15
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Hsiao YC, Jheng PR, Nguyen HT, Chen YH, Manga YB, Lu LS, Rethi L, Chen CH, Huang TW, Lin JD, Chang TK, Ho YC, Chuang EY. Photothermal-Irradiated Polyethyleneimine-Polypyrrole Nanopigment Film-Coated Polyethylene Fabrics for Infrared-Inspired with Pathogenic Evaluation. ACS Appl Mater Interfaces 2021; 13:2483-2495. [PMID: 33404219 DOI: 10.1021/acsami.0c17169] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Influenza, pneumonia, and pathogenic infection of the respiratory system are boosted in cold environments. Low temperatures also result in vasoconstriction, restraint of blood flow, and decreased oxygen to the heart, and the risk of a heart attack would increase accordingly. The present face mask fabric fails to preserve its air-filtering function as its electrostatic function vanishes once exposed to water. Therefore, its filtering efficacy would be decreased meaningfully, making it nearly impracticable to reuse the disposable face masks. The urgent requirement for photothermal fabrics is also rising. Nanobased polyethyleneimine-polypyrrole nanopigments (NPP NPs) have been developed and have strong near-infrared spectrum absorption and exceptional photothermal convertible performance. Herein, the mask fabric used PE-fiber-constructed membrane (PEFM) was coated by the binding affinity of the cationic polyethyleneimine component of NPP NPs forming NPP NPs-PEFM. To the best of our knowledge, no study has investigated NPP NP-coated mask fabric to perform infrared red (solar or body) photothermal conversion efficacy to provide biocompatible warming, remotely photothermally captured antipathogen, and antivasoconstriction in vivo. This pioneering study showed that the developed NPP NPs-PEFM could be washable, reusable, breathable, biocompatible, and photothermal conversable for active eradication of pathogenic bacteria. Further, it possesses warming preservation and antivasoconstriction.
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Affiliation(s)
- Yu-Cheng Hsiao
- Graduate Institute of Biomedical Optomechatronics, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Pei-Ru Jheng
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Hieu T Nguyen
- Department of Orthopedics and Trauma, Faculty of Medicine, University of Medicine and Pharmacy at Ho Chi Minh City, Ho Chi Minh 700000, Vietnam
- International Ph.D. Program in Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Yun-Hsuan Chen
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Yankuba B Manga
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Long-Sheng Lu
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
- Department of Radiation Oncology, Taipei Medical University Hospital, Taipei Medical University, Taipei 11031, Taiwan
| | - Lekha Rethi
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Chih-Hwa Chen
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
- Department of Orthopedics, Taipei Medical University-Shuang Ho Hospital, 291 Zhongzheng Road, Zhonghe District, New Taipei City 23561, Taiwan
- Research Center of Biomedical Device, Taipei Medical University, Taipei 11031, Taiwan
- School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Tzu-Wen Huang
- Department of Microbiology and Immunology, School of Medicine, College of Medicine, Taipei Medical University, Taipei City 11031, Taiwan
| | - Jia-De Lin
- Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien 974301, Taiwan
| | - Ting-Kuang Chang
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
| | - Yi-Cheng Ho
- Department of Bio-agricultural Science, National Chiayi University, Chiayi 60004, Taiwan
| | - Er-Yuan Chuang
- Graduate Institute of Biomedical Materials and Tissue Engineering; International Ph.D. Program in Biomedical Engineering; School of Biomedical Engineering, College of Biomedical Engineering, Taipei Medical University, Taipei 11031, Taiwan
- Cell Physiology and Molecular Image Research Center, Taipei Medical University-Wan Fang Hospital, 111, Sec. 3, Xinglong Road, Wenshan District, Taipei 116, Taiwan
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16
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Abstract
Self-disinfecting textile materials employing combined photodynamic/photothermal effects enable the prevention of microbial infections, a property that has great potential in healthcare applications. However, smart textiles with stimulus responses to ambient temperature are marvelous materials for enhancing their photothermal applications with additional functions. It is still challenging to realize vivid and contrasting color changes as temperature indicators. Herein, through the in situ growth of PCN-224 metal-organic frameworks (MOFs), the electrospraying of a Ti3C2 MXene colloid, and the screen printing of a thermochromic dye, a smart photothermochromic self-disinfecting textile has been fabricated. An antibacterial inactivation study revealed 99.9999% inactivation toward gram-negative (Escherichia coli ATCC 8099) and gram-positive (Staphylococcus aureus ATCC 6538) bacteria in 30 min. A mechanism study revealed that light-driven singlet oxygen and heat are the main reasons for bacterial inactivation. Interestingly, the fabrics presented photothermal effects not only under a handheld 780 nm NIR laser but also under visible Xe lamp (λ ≥ 420 nm) illumination. The color of the fabrics (S-CF@PCN0.08) changed completely from dark green to dark red when the temperature exceeded 45 °C under Xe lamp illumination. Furthermore, the photothermochromic effect occurred in just 1 s under a 780 nm laser. Taken together, this smart photothermochromic self-disinfecting textile permits a new way to feedback the timely signal of temperature by color change and provides novel insights into the development of self-disinfecting textiles.
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Affiliation(s)
- Xiaolin Nie
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Shuanglin Wu
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Fenglin Huang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Qingqing Wang
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Qufu Wei
- Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi 214122, China
- Fujian Key Laboratory of Novel Functional Textile Fibers and Materials, Minjiang University, Fuzhou, Fujian 350108, China
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17
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Nam S, Hillyer MB, Condon BD, Lum JS, Richards MN, Zhang Q. Silver Nanoparticle-Infused Cotton Fiber: Durability and Aqueous Release of Silver in Laundry Water. J Agric Food Chem 2020; 68:13231-13240. [PMID: 32286814 DOI: 10.1021/acs.jafc.9b07531] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Although the application of silver nanoparticles to commercial antibacterial items is well-established, there have been increasing concerns that such particles might leach out, particularly into laundry water from textile products. A recently developed process wherein silver nanoparticles are synthesized in situ within the cotton fiber itself promises, however, to achieve the desired washing durability. In this study, the silver release behavior of the silver nanoparticle-infused cotton fabric during consecutive launderings in water and a detergent solution was analyzed. Silver nanoparticles (12 ± 3 nm in diameter) were uniformly produced throughout the entire volume of cotton fiber with a concentration of 3017 ± 56 mg/kg. A combination of colorimetric, spectroscopic, and elemental analyses showed (1) nonlinear silver release behavior, with a rapid release from externally formed nanoparticles during the initial washing and a plateau-like release from internally formed nanoparticles during extended washing, and (2) superior nanoparticle-leach resistance compared to those in commercial and laboratory-prepared textiles analyzed in the literature. The internal nanoparticles immobilized within cotton fiber exhibited persistent antibacterial activity after 50 home laundering cycles.
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Affiliation(s)
- Sunghyun Nam
- Southern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, New Orleans, Louisiana 70124, United States
| | - Matthew B Hillyer
- Southern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, New Orleans, Louisiana 70124, United States
| | - Brian D Condon
- Southern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, New Orleans, Louisiana 70124, United States
| | - June S Lum
- Chemical Biological Innovative Materials & Ensemble Development Team, U.S. Army Combat Capabilities Development Command Soldier Center, Natick, Massachusetts 01760, United States
| | - Molly N Richards
- Chemical Biological Innovative Materials & Ensemble Development Team, U.S. Army Combat Capabilities Development Command Soldier Center, Natick, Massachusetts 01760, United States
| | - Qingbo Zhang
- Department of Chemistry, Brown University, Providence, Rhode Island 02912, United States
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18
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Tang P, Zhang Z, El-Moghazy AY, Wisuthiphaet N, Nitin N, Sun G. Daylight-Induced Antibacterial and Antiviral Cotton Cloth for Offensive Personal Protection. ACS Appl Mater Interfaces 2020; 12:49442-49451. [PMID: 33090782 DOI: 10.1021/acsami.0c15540] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Cotton fabrics with durable and reusable daylight-induced antibacterial/antiviral functions were developed by using a novel fabrication process, which employs strong electrostatic interaction between cationic cotton fibers and anionic photosensitizers. The cationic cotton contains polycationic short chains produced by a self-propagation of 2-diehtylaminoehtyl chloride (DEAE-Cl) on the surface of cotton fibers. Then, the fabric (i.e., polyDEAE@cotton) can be readily functionalized with anionic photosensitizers like rose Bengal and sodium 2-anthraquinone sulfate to produce biocidal reactive oxygen species (ROS) under light exposure and consequently provide the photo-induced biocidal functions. The biocidal properties of the photo-induced fabrics (PIFs) were demonstrated by ROS production measurements, bactericidal performance against bacteria (e.g., E coli and L. innocua), and antiviral results against T7 bacteriophage. The PIFs achieved 99.9999% (6 log) reductions against bacteria and the bacteriophage within 60 min of daylight exposure. Moreover, the PIFs showcase excellent washability and photostability, making them ideal materials for reusable face masks and protective suits with improved biological protections compared with traditional PPE. This work demonstrated that the cationized cotton could serve as a platform for different functionalization applications, and the resulting fiber materials could inspire the development of reusable and sustainable PPE with significant bioprotective properties to fight the COVID-19 pandemic as well as the spread of other contagious diseases.
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Affiliation(s)
- Peixin Tang
- Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California 95616, United States
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
| | - Zheng Zhang
- Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California 95616, United States
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
| | - Ahmed Y El-Moghazy
- Department of Food Science and Technology, University of California, Davis, California 95616, United States
| | - Nicharee Wisuthiphaet
- Department of Food Science and Technology, University of California, Davis, California 95616, United States
| | - Nitin Nitin
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
- Department of Food Science and Technology, University of California, Davis, California 95616, United States
| | - Gang Sun
- Agricultural and Environmental Chemistry Graduate Group, University of California, Davis, California 95616, United States
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, United States
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He W, Guo Y, Gao H, Liu J, Yue Y, Wang J. Evaluation of Regeneration Processes for Filtering Facepiece Respirators in Terms of the Bacteria Inactivation Efficiency and Influences on Filtration Performance. ACS Nano 2020; 14:13161-13171. [PMID: 32975412 DOI: 10.1021/acsnano.0c04782] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The regeneration of filtering facepiece respirators (FFRs) is of critical importance because of the severe shortage of FFRs during large-scale outbreaks of respiratory epidemics, such as COVID-19. Comprehensive experiments regarding FFR regeneration were performed in this study with model bacteria to illustrate the decontamination performance of the regeneration processes. The results showed that it is dangerous to use a contaminated FFR without any microbe inactivation treatment because the bacteria can live for more than 8 h. The filtration efficiency and surface electrostatic potential of 75% ethanol-treated FFRs were significantly reduced, and a most penetrating particle size of 200 nm was observed. Steam and microwave irradiation (MWI) showed promising decontamination performances, achieving 100% inactivation in 90 and 30 min, respectively. The filtration efficiencies of steam-treated FFRs for 50 and 100 nm particles decreased from 98.86% and 99.51% to 97.58% and 98.79%, respectively. Ultraviolet irradiation (UVI) effectively inactivated the surface bacteria with a short treatment of 5 min and did not affect the filtration performance. However, the UV dose reaching different layers of the FFP2 mask sample gradually decreased from the outermost layer to the innermost layer, while the model bacteria on the second and third layers could not be killed completely. UVI+MWI and steam were recommended to effectively decontaminate the used respirators and still maintain the respirators' filtration efficiency. The present work provides a comprehensive evaluation for FFR regeneration in terms of the filtration efficiencies for 50-500 nm particles, the electrostatic properties, mechanical properties, and decontamination effects.
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Affiliation(s)
- Weidong He
- Filter Test Center, Northeastern University, Shenyang, Liaoning CN-110819, China
- Institute of Environmental Engineering, ETH Zürich, Zürich, CH-8093, Switzerland
- Lab of Advanced Analytical Technologies, Empa, Dübendorf, CH-8600, Switzerland
| | - Yinghe Guo
- Filter Test Center, Northeastern University, Shenyang, Liaoning CN-110819, China
- Institute of Environmental Engineering, ETH Zürich, Zürich, CH-8093, Switzerland
- Lab of Advanced Analytical Technologies, Empa, Dübendorf, CH-8600, Switzerland
| | - Hanchao Gao
- Institute of Environmental Engineering, ETH Zürich, Zürich, CH-8093, Switzerland
- Lab of Advanced Analytical Technologies, Empa, Dübendorf, CH-8600, Switzerland
| | - Jingxian Liu
- Filter Test Center, Northeastern University, Shenyang, Liaoning CN-110819, China
| | - Yang Yue
- Institute of Environmental Engineering, ETH Zürich, Zürich, CH-8093, Switzerland
- Lab of Advanced Analytical Technologies, Empa, Dübendorf, CH-8600, Switzerland
| | - Jing Wang
- Institute of Environmental Engineering, ETH Zürich, Zürich, CH-8093, Switzerland
- Lab of Advanced Analytical Technologies, Empa, Dübendorf, CH-8600, Switzerland
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Lara HH, Ixtepan-Turrent L, Yacaman MJ, Lopez-Ribot J. Inhibition of Candida auris Biofilm Formation on Medical and Environmental Surfaces by Silver Nanoparticles. ACS Appl Mater Interfaces 2020; 12:21183-21191. [PMID: 31944650 PMCID: PMC8243355 DOI: 10.1021/acsami.9b20708] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Candida auris is an emerging pathogenic fungus implicated in healthcare-associated outbreaks and causes bloodstream infections associated with high mortality rates. Biofilm formation represents one of the major pathogenetic traits associated with this microorganism. Unlike most other Candida species, C. auris has the ability to survive for weeks on different surfaces. Therefore, there is an urgent need to develop new effective control strategies to combat the threat of C. auris. Advances in nanotechnologies have emerged that carry significant potential impact against Candida biofilms. We obtained pure round silver nanoparticles (AgNPs) (1 to 3 nm in diameter) using a microwave-assisted synthetic approach. When tested against C. auris, our results indicated a potent inhibitory activity both on biofilm formation (half maximal inhibitory concentration (IC50) of 0.06 ppm) and against preformed biofilms (IC50 of 0.48 ppm). Scanning electron microscopy images of AgNP-treated biofilms showed cell wall damage mostly by disruption and distortion of the outer surface of the fungal cell wall. In subsequent experiments AgNPs were used to functionalize medical and environmental surfaces. Silicone elastomers functionalized with AgNPs demonstrated biofilm inhibition (>50%) at relatively low concentrations (2.3 to 0.28 ppm). Bandage dressings loaded with AgNPs inhibited growth of C. auris biofilms by more than 80% (2.3 to 0.017 ppm). Also, to demonstrate long-lasting protection, dressings loaded with AgNPs (0.036 ppm) were washed thoroughly with phosphate-buffered saline, maintaining protection against the C. auris growth from cycles 1 to 3 (>80% inhibition) and from cycles 4 to 6 (>50% inhibition). Our results demonstrate the dose-dependent activity of AgNPs against biofilms formed by C. auris on both medical (silicone elastomer) and environmental (bandage fibers) surfaces. The AgNPs-functionalized fibers retain the fungicidal effect even after repeated thorough washes. Overall these results point to the utility of silver nanoparticles to prevent and control infections caused by this emerging pathogenic fungus.
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Affiliation(s)
- Humberto H. Lara
- Department of Biology and South Texas Center for Emerging Infectious Diseases
| | - Liliana Ixtepan-Turrent
- Departamento de Ciencias Basicas, Division de Ciencia de la Salud, Universidad de Monterrey, San Pedro Garza García, Nuevo León 66238, México
| | - Miguel Jose Yacaman
- Department of Applied Physics and Materials Science, Northern Arizona University, 700 South Osborne Drive, Flagstaff, Arizona 86011, United States
| | - Jose Lopez-Ribot
- Department of Biology and South Texas Center for Emerging Infectious Diseases
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Castellanos JG, Preminger J, Steinkamp ML, Longman RS, Pryor KO. Evaluation of a novel ultraviolet C irradiation locker for microbial sterilization of hospital laboratory coats. J Hosp Infect 2020; 105:334-336. [PMID: 32027947 DOI: 10.1016/j.jhin.2020.01.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 01/27/2020] [Indexed: 11/16/2022]
Affiliation(s)
- J G Castellanos
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA; Jill Roberts Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medicine, New York, NY, USA.
| | - J Preminger
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA
| | - M L Steinkamp
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA
| | - R S Longman
- Jill Roberts Institute for Research in Inflammatory Bowel Disease, Weill Cornell Medicine, New York, NY, USA; Jill Roberts Center for Inflammatory Bowel Disease, Weill Cornell Medicine, New York, NY, USA
| | - K O Pryor
- Department of Anesthesiology, Weill Cornell Medicine, New York, NY, USA
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22
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Xu J, Zhao H, Xie Z, Ruppel S, Zhou X, Chen S, Liang JF, Wang X. Stereochemical Strategy Advances Microbially Antiadhesive Cotton Textile in Safeguarding Skin Flora. Adv Healthc Mater 2019; 8:e1900232. [PMID: 31183997 PMCID: PMC8754253 DOI: 10.1002/adhm.201900232] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 05/23/2019] [Indexed: 12/16/2022]
Abstract
Microbial contamination on cotton textiles (CT) negatively affects people's health as well as the textile itself during use and storage. Using antimicrobial CT in a body-safe manner is currently still a challenge because it is difficult to balance killing microbes and protecting skin flora. Herein, a borneol-decorated CT (BDCT) through coupling of borneol 4-formylbenzoate molecules onto the amino-modified CT is reported. This BDCT shows strong and broad-spectrum microbially antiadhesive activities against gram-positive bacteria (Staphylococcus aureus and S. epidermidis), gram-negative bacteria (Escherichia coli and Pseudomonas aeruginosa), and fungi (Aspergillus niger, Mucor racemosus, and Candida albicans). Because of its unique stereochemical microbial antiadhesion mechanism, BDCT is harmless to skin flora. In addition, BDCT exhibits prominent durability of microbially antiadhesive capability by bearing 50 times of accelerated laundering. Therefore, this stereochemical BDCT strategy shows great potential for applications in the new generation of textiles, food packaging, and medical protection.
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Affiliation(s)
- Jiangqi Xu
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Hongjuan Zhao
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Zixu Xie
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Scott Ruppel
- Department of Biomedical Engineering, Chemistry, and Biological Sciences, Charles V. Schaefer School of Engineering and Sciences, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
| | - Xiaqing Zhou
- Department of Biomedical Engineering, Chemistry, and Biological Sciences, Charles V. Schaefer School of Engineering and Sciences, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
| | - Shuang Chen
- Department of Biomedical Engineering, Chemistry, and Biological Sciences, Charles V. Schaefer School of Engineering and Sciences, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
| | - Jun F. Liang
- Department of Biomedical Engineering, Chemistry, and Biological Sciences, Charles V. Schaefer School of Engineering and Sciences, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
| | - Xing Wang
- Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing Laboratory of Biomedical Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
- Department of Biomedical Engineering, Chemistry, and Biological Sciences, Charles V. Schaefer School of Engineering and Sciences, Stevens Institute of Technology, Hoboken, New Jersey 07030, USA
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Sands F, Fairbanks L. How clean is "hygienically clean": Quantitative microbial levels from samples of clean health care textiles across the United States. Am J Infect Control 2019; 47:509-514. [PMID: 30638671 DOI: 10.1016/j.ajic.2018.11.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2018] [Revised: 11/20/2018] [Accepted: 11/21/2018] [Indexed: 11/30/2022]
Abstract
BACKGROUND In the United States, the laundry industry has not reliably measured microbial levels on hygienically clean textiles. The aim of this study was to quantitatively measure the microbial levels found on a sample of hygienically clean textiles. METHODS Forty-eight health care textile samples were collected from hygienically clean linen scheduled to be used on 3 different patient care units. Samples were taken at 2 separate points in time representing laundry facility processing practices and hospital linen management practices. United States Pharmacopeia 61 testing was completed using a pour plate culturing method, producing a total aerobic microbial count and a total yeast and mold count. RESULTS Of the samples, only 27% had a total aerobic microbial count below the expected 100 colony-forming unit level (range, 9-40,000) versus 81% (range, 9-1,000) for total yeast and mold count. Median microbial counts for the 2 separate time points across the 3 different patient care units were also higher than expected. CONCLUSIONS As far as we know, this study is a first step by the laundry industry to understand what quantitative microbial levels are currently found on hygienically clean health care textiles. These types of data can assist the industry in establishing appropriate outcome targets for process improvement initiatives.
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Affiliation(s)
- Fontaine Sands
- Department of Baccalaureate and Graduate Nursing, Eastern Kentucky University, Richmond, KY; Association for Linen Management, Richmond, KY.
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24
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Maal-Bared R. Efficacy of laundering and tumble-drying in reducing microbial contamination of wastewater treatment plant worker coveralls. Am J Infect Control 2019; 47:527-533. [PMID: 30578140 DOI: 10.1016/j.ajic.2018.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Revised: 11/05/2018] [Accepted: 11/06/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Evidence implicates textiles in health care as potential reservoirs of pathogens. No similar data exist for the wastewater treatment plant (WWTP) industry. We investigated if coveralls worn by WWTP workers could present occupational infection risk. METHODS We enumerated heterotrophic plate counts (HPCs), total coliforms, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, methicillin-resistant Staphylococcus aureus, Clostridium difficile, and Acinetobacter spp on coverall swatches experimentally contaminated with raw, primary, secondary, and final effluent. Contaminated swatches were examined by culture-based methods after laundering, tumble-drying, and storing. RESULTS Concentrations of microorganisms and efficacy of decontamination differed depending on the contaminating wastewater matrix and the organism. Laundering was an effective decontamination method for coveralls contaminated with all microorganisms, except HPCs. Tumble-drying resulted in statistically significant decreases for HPCs, P aeruginosa, and Acinetobacter. Increases in contamination after laundering were seen in Acinetobacter spp, in P aeruginosa when coverall swatches were contaminated with raw and final effluent, and in HPCs when contaminated with secondary effluent. DISCUSSION Results suggest that solely laundering at 60°C for 25 minutes as per ASTM Standard F1449 may not always be an efficient means of controlling microorganisms on coveralls. CONCLUSIONS Clearer guidelines are needed to better protect WWTP workers.
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25
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McGoldrick M. Management of the Nursing Bag With Embedded Antimicrobial. Home Healthc Now 2019; 37:178-179. [PMID: 31058739 DOI: 10.1097/nhh.0000000000000774] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Mary McGoldrick
- Mary McGoldrick, MS, RN, CRNI, is a Home Care and Hospice Consultant, Home Health Systems, Inc., Naples, Florida
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26
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Shek K, Patidar R, Kohja Z, Liu S, Gawaziuk JP, Gawthrop M, Kumar A, Logsetty S. Rate of contamination of hospital privacy curtains in a burns/plastic ward: A longitudinal study. Am J Infect Control 2018; 46:1019-1021. [PMID: 29655669 DOI: 10.1016/j.ajic.2018.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 03/05/2018] [Accepted: 03/06/2018] [Indexed: 11/15/2022]
Abstract
BACKGROUND Since hospital patient privacy curtains can harbor bacteria, are high-touch surfaces, and are cleaned infrequently, they may be involved in pathogen transmission. The aim of this longitudinal prospective study was to understand curtain contamination to inform curtain hygiene protocols, thereby minimizing the role of curtains in pathogen transmission. METHODS Over 21 days, cultures of 10 freshly laundered curtains (8 test curtains surrounding patient beds and 2 controls in an unoccupied staff room) were taken in the Regional Burns/Plastics Unit. Contact plates were used to sample the curtains near the edge hem where they are most frequently touched. Microbial contamination and the presence of methicillin-resistant Staphylococcus aureus (MRSA) were determined. RESULTS By day 3, test curtains showed increased microbial contamination (mean colony-forming units [CFU]/cm2 = 1.17) compared to control curtains (mean CFU/cm2 = 0.19). Test curtains became increasingly contaminated over time, with mean CFU/cm2 for days 17 and 21 of 1.86 and 5.11, respectively. By day 10, 1/8 test curtains tested positive for MRSA, and 5/8 were positive by day 14. CONCLUSIONS Patient privacy curtains became progressively contaminated with bacteria, including MRSA. Between days 10 and 14 after being hung, curtains showed increased MRSA positivity. This may represent an opportune time to intervene, either by cleaning or replacing the curtains.
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Affiliation(s)
- Kevin Shek
- College of Medicine, BSc Med Research Program, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Rakesh Patidar
- Department of Microbiology, University of Manitoba, Winnipeg, MB, Canada
| | - Zeenib Kohja
- College of Medicine, BSc Med Research Program, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Song Liu
- Department of Biosystems Engineering, Faculty of Agricultural and Food Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Justin P Gawaziuk
- Manitoba Firefighters' Burn Unit, Health Sciences Centre, Winnipeg, MB, Canada
| | - Monika Gawthrop
- Manitoba Firefighters' Burn Unit, Health Sciences Centre, Winnipeg, MB, Canada
| | - Ayush Kumar
- Department of Microbiology, University of Manitoba, Winnipeg, MB, Canada
| | - Sarvesh Logsetty
- Manitoba Firefighters' Burn Unit, Health Sciences Centre, Winnipeg, MB, Canada; Department of Surgery and Children's Health, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
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27
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Shaban M, Mohamed F, Abdallah S. Production and Characterization of Superhydrophobic and Antibacterial Coated Fabrics Utilizing ZnO Nanocatalyst. Sci Rep 2018; 8:3925. [PMID: 29500470 PMCID: PMC5834644 DOI: 10.1038/s41598-018-22324-7] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 02/21/2018] [Indexed: 12/03/2022] Open
Abstract
Dirt and microorganisms are the major problems in textiles which can generate unpleasant odor during their growth. Here, zinc oxide (ZnO) nanoparticles prepared by sol-gel method were loaded on the cotton fabrics using spin coating technique to enhance their antimicrobial properties and water repellency. The effects of ZnO precursor concentration, precursor solution pH, number of coating runs, and Mg doping percent on the structures, morphologies, and water contact angles (WCA) of the ZnO-coated fabrics were addressed. At 0.5 M concentration and pH7, more homogeneous and smaller ZnO nanoparticles were grown along the preferred (0 0 2) direction and uniformly distributed on the fabric with a crystallite size 17.98 nm and dislocation density 3.09 × 10-3 dislocation/nm2. The substitution of Zn 2+ with Mg 2+ ions slightly shifted the (002) peak position to a higher angle. Also, the zeta potential and particle size distribution were measured for ZnO nanoparticle suspension. A superhydrophobic WCA = 154° was measured for the fabric that coated at 0.5 M precursor solution, pH 7, 20 runs and 0% Mg doping. Moreover, the antibacterial activities of the ZnO-coated fabric were investigated against some gram-positive and gram-negative bacteria such as Salmonella typhimurium, Klebsiella pneumonia, Escherichia coli, and Bacillus subtilis.
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Affiliation(s)
- Mohamed Shaban
- Nanophotonics and Applications (NPA) Lab, Department of Physics, Faculty of Science, Beni -Suef University, Beni-Suef, 62514, Egypt.
| | - Fatma Mohamed
- Nanophotonics and Applications (NPA) Lab, Department of Physics, Faculty of Science, Beni -Suef University, Beni-Suef, 62514, Egypt
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62111, Egypt
| | - Semsem Abdallah
- Nanophotonics and Applications (NPA) Lab, Department of Physics, Faculty of Science, Beni -Suef University, Beni-Suef, 62514, Egypt
- Department of Chemistry, Faculty of Science, Beni-Suef University, Beni-Suef, 62111, Egypt
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Haase H, Jordan L, Keitel L, Keil C, Mahltig B. Comparison of methods for determining the effectiveness of antibacterial functionalized textiles. PLoS One 2017; 12:e0188304. [PMID: 29161306 PMCID: PMC5697868 DOI: 10.1371/journal.pone.0188304] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 11/04/2017] [Indexed: 12/03/2022] Open
Abstract
Antimicrobial functionalization of textiles is important for various applications, such as protection of textile materials from decomposition, generation of more effective wound dressings, and the prevention of infections or malodors resulting from bacterial growth. In order to test the efficacy of new products, their antibacterial activity needs to be evaluated. At present, several different procedures are being used for this purpose, hindering comparisons among different studies. The present paper compares five of these assays using a sample panel of different textiles functionalized with copper (Cu) and silver (Ag) as antibacterial agents, and discusses the suitability of these methods for different analytical requirements. Bacterial viability was determined by measuring the optical density at 600 nm, a colorimetric assay based on MTT (3-[4, 5-dimethylthiazol-2-yl]-2, 5 diphenyl tetrazolium bromide) conversion, an agar diffusion assay, and colony formation, either after culturing in media containing textile samples, or after recovery from textiles soaked with bacterial suspension. All experiments were performed with a Gram-negative (Escherichia coli) and a Gram-positive (Staphylococcus warneri) model organism. In general, the results yielded by the different methods were of good comparability. To identify the most suitable test system for the particular type of antibacterial coating, several factors need to be taken into account, such as choosing appropriate endpoints for analyzing passive or active antibacterial effects, selection of relevant microorganisms, correcting for potential interference by leaching of colored textile coatings, required hands on time, and the necessary sensitivity.
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Affiliation(s)
- Hajo Haase
- Department of Food Chemistry and Toxicology, Institute for Food Technology and Food Chemistry, Technische Universität Berlin, Berlin, Germany
- * E-mail:
| | - Lisa Jordan
- Department of Food Chemistry and Toxicology, Institute for Food Technology and Food Chemistry, Technische Universität Berlin, Berlin, Germany
| | - Laura Keitel
- Department of Food Chemistry and Toxicology, Institute for Food Technology and Food Chemistry, Technische Universität Berlin, Berlin, Germany
| | - Claudia Keil
- Department of Food Chemistry and Toxicology, Institute for Food Technology and Food Chemistry, Technische Universität Berlin, Berlin, Germany
| | - Boris Mahltig
- Faculty of Textile and Clothing Technology, Hochschule Niederrhein, University of Applied Science, Mönchengladbach, Germany
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Tzhayik O, Lipovsky A, Gedanken A. Sonochemical fabrication of edible fragrant antimicrobial nano coating on textiles and polypropylene cups. Ultrason Sonochem 2017; 38:614-621. [PMID: 27569647 DOI: 10.1016/j.ultsonch.2016.08.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2016] [Revised: 08/10/2016] [Accepted: 08/14/2016] [Indexed: 06/06/2023]
Abstract
We report on a simple and effective ultrasound-assisted deposition of vanillin nanoparticles (∼50nm in size), raspberry ketone (RK) nanoparticles (∼40nm in size) and camphor nanoparticles (width ∼30nm, length ∼40nm in size) on textiles and on polypropylene surfaces. The excellent antibacterial and antifungal activity of the fragrant coatings on cotton bandages, and polypropylene surface against Escherichia coli (E. coli), Salmonella paratyphi A (S. paratyphi A) and the yeast Candida albicans (C. albicans) cultures was demonstrated. It is worth pointing out that these fragrant materials are edible, making them very useful for packaging. The mechanism of the edible fragrant coating formation and adhesion to the textile was discussed, and finally an up-scaling of the sonochemical process for textile coating was carried out.
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Affiliation(s)
- O Tzhayik
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - A Lipovsky
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel
| | - A Gedanken
- Department of Chemistry, Bar-Ilan University, Ramat-Gan 52900, Israel.
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30
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Marcus EL, Yosef H, Borkow G, Caine Y, Sasson A, Moses AE. Reduction of health care-associated infection indicators by copper oxide-impregnated textiles: Crossover, double-blind controlled study in chronic ventilator-dependent patients. Am J Infect Control 2017; 45:401-403. [PMID: 28034536 DOI: 10.1016/j.ajic.2016.11.022] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 11/22/2016] [Accepted: 11/22/2016] [Indexed: 02/05/2023]
Abstract
BACKGROUND Copper oxide has potent wide-spectrum biocidal properties. The purpose of this study is to determine if replacing hospital textiles with copper oxide-impregnated textiles reduces the following health care-associated infection (HAI) indicators: antibiotic treatment initiation events (ATIEs), fever days, and antibiotic usage in hospitalized chronic ventilator-dependent patients. METHODS A 7-month, crossover, double-blind controlled trial including all patients in 2 ventilator-dependent wards in a long-term care hospital. For 3 months (period 1), one ward received copper oxide-impregnated textiles and the other received untreated textiles. After a 1-month washout period of using regular textiles, for 3 months (period 2) the ward that received the treated textiles received the control textiles and vice versa. The personnel were blinded to which were treated or control textiles. There were no differences in infection control measures during the study. RESULTS There were reductions of 29.3% (P = .002), 55.5% (P < .0001), 23.0% (P < .0001), and 27.5% (P < .0001) in the ATIEs, fever days (>37.6°C), days of antibiotic treatment, and antibiotic defined daily dose per 1,000 hospitalization days, respectively, when using the copper oxide-impregnated textiles. CONCLUSIONS Use of copper oxide-impregnated biocidal textiles in a long-term care ward of ventilator-dependent patients was associated with a significant reduction of HAI indicators and antibiotic utilization. Using copper oxide-impregnated biocidal textiles may be an important measure aimed at reducing HAIs in long-term care medical settings.
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Affiliation(s)
- Esther-Lee Marcus
- Chronic Ventilator-Dependent Division, Herzog Hospital, Jerusalem, Israel.
| | - Hana Yosef
- Infection Control Unit, Herzog Hospital, Jerusalem, Israel
| | | | - Yehezkel Caine
- Chronic Ventilator-Dependent Division, Herzog Hospital, Jerusalem, Israel
| | - Ady Sasson
- Chronic Ventilator-Dependent Division, Herzog Hospital, Jerusalem, Israel
| | - Allon E Moses
- Department of Clinical Microbiology and Infectious Diseases, Hadassah Medical Center, Jerusalem, Israel
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31
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Openshaw JJ, Morris WM, Lowry GV, Nazmi A. Reduction in bacterial contamination of hospital textiles by a novel silver-based laundry treatment. Am J Infect Control 2016; 44:1705-1708. [PMID: 27561434 DOI: 10.1016/j.ajic.2016.06.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 06/14/2016] [Accepted: 06/14/2016] [Indexed: 11/19/2022]
Abstract
Treating hospital patient textiles with ionic silver after each washing results in a significant decrease in microbial contamination. Although further study is needed to better understand the role textiles play in hospital-acquired infections and to quantify the influence of silver textile treatment on health care-associated infection risk and patient outcomes, ionic silver treatment of textiles may prove useful in hospital-acquired infection reduction strategies.
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Affiliation(s)
- John J Openshaw
- Division of Infectious Diseases and Geographic Medicine, Stanford University, Stanford, CA.
| | | | - Gregory V Lowry
- Civil & Environmental Engineering, Carnegie Mellon University, Pittsburgh, PA
| | - Aydin Nazmi
- Department of Food Science and Nutrition, California Polytechnic State University, San Luis Obispo, CA
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Institute H. [Not Available]. Kinderkrankenschwester 2016; 35:307. [PMID: 30380245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
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Liu Y, Li J, Li L, McFarland S, Ren X, Acevedo O, Huang TS. Characterization and Mechanism for the Protection of Photolytic Decomposition of N-Halamine Siloxane Coatings by Titanium Dioxide. ACS Appl Mater Interfaces 2016; 8:3516-23. [PMID: 26824841 DOI: 10.1021/acsami.5b12601] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
N-Halamine antibacterial materials have superior inactivation activities due to oxidative chlorine species. However, N-Cl bonds and bonds between N-halamine and substrates often decompose rapidly under UV irradiation, leading to unrecoverable loss of antimicrobial activity. In this study, titanium dioxide was covalently bonded onto N-halamine siloxane poly[5,5-dimethyl-3-(3'-triethoxysilylpropyl)hydantoin] (PSPH) via a sol-gel process. Experimental testing of the chlorinated cotton fabrics treated with TiO2/PSPH demonstrated that the residual oxidative chlorine in cotton-TiO2/PSPH-Cl was still effective for inactivating bacteria after 50 washing cycles and under UV light irradiation for 24 h. Quantum mechanical calculations found that TiO2 improves the UV stability of the PSPH-Cl system by increasing the activation barrier of the C-Si scission reaction responsible for the loss of the biocidal hydantoin moiety. SEM, XPS and FTIR spectra were used to characterize the coated cotton samples. Cotton-TiO2/PSPH-Cl samples exhibited good antibacterial activity against Staphylococcus aureus (ATCC 6538) and Escherichia coli O157:H7 (ATCC 43895). The storage stability and washing stability of treated cotton fabrics were also investigated.
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Affiliation(s)
- Ying Liu
- Key Laboratory of Eco-textiles of Ministry of Education, College of Textiles and Clothing, Jiangnan University , Wuxi 214122, Jiangsu, China
| | - Jing Li
- Key Laboratory of Eco-textiles of Ministry of Education, College of Textiles and Clothing, Jiangnan University , Wuxi 214122, Jiangsu, China
| | - Lin Li
- Key Laboratory of Eco-textiles of Ministry of Education, College of Textiles and Clothing, Jiangnan University , Wuxi 214122, Jiangsu, China
| | - Stuart McFarland
- Department of Chemistry, University of Miami , Coral Gables, Florida 33146, United States
| | - Xuehong Ren
- Key Laboratory of Eco-textiles of Ministry of Education, College of Textiles and Clothing, Jiangnan University , Wuxi 214122, Jiangsu, China
| | - Orlando Acevedo
- Department of Chemistry, University of Miami , Coral Gables, Florida 33146, United States
| | - T S Huang
- Department of Poultry Science, Auburn University , Auburn, Alabama 36849, United States
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Hou A, Feng G, Zhuo J, Sun G. UV Light-Induced Generation of Reactive Oxygen Species and Antimicrobial Properties of Cellulose Fabric Modified by 3,3',4,4'-Benzophenone Tetracarboxylic Acid. ACS Appl Mater Interfaces 2015; 7:27918-24. [PMID: 26636826 DOI: 10.1021/acsami.5b09993] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
3,3',4,4'-Benzophenone tetracarboxylic acid (BPTCA) could directly react with hydroxyl groups on cellulose to form ester bonds. The modified cotton fabrics not only provided good wrinkle-free and ultraviolet (UV) protective functions, but also exhibited important photochemical properties such as producing reactive oxygen species (ROS) including hydroxyl radicals (HO(•)) and hydrogen peroxide (H2O2) under UV light exposure. The amounts of the produced hydroxyl radical and hydrogen peroxide were measured, and photochemical reactive mechanism of the BPTCA treated cellulose was discussed. The results reveal that the fabrics possess good washing durability in generation of hydroxyl radicals and hydrogen peroxide. The cotton fabrics modified with different concentrations of BPTCA and cured at an elevated temperature demonstrated excellent antimicrobial activities, which provided 99.99% antibacterial activities against both E. coli and S. aureus. The advanced materials have potential applications in medical textiles and biological material fields.
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Affiliation(s)
- Aiqin Hou
- National Engineering Research Center for Dyeing and Finishing of Textiles, Donghua University , Shanghai 201620, China
- Division of Textiles and Clothing, University of California , Davis, California 95616, United States
| | - Guanchen Feng
- National Engineering Research Center for Dyeing and Finishing of Textiles, Donghua University , Shanghai 201620, China
| | - Jingyuan Zhuo
- Division of Textiles and Clothing, University of California , Davis, California 95616, United States
| | - Gang Sun
- Division of Textiles and Clothing, University of California , Davis, California 95616, United States
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Handorean A, Robertson CE, Harris JK, Frank D, Hull N, Kotter C, Stevens MJ, Baumgardner D, Pace NR, Hernandez M. Microbial aerosol liberation from soiled textiles isolated during routine residuals handling in a modern health care setting. Microbiome 2015; 3:72. [PMID: 26646166 PMCID: PMC4673858 DOI: 10.1186/s40168-015-0132-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 11/09/2015] [Indexed: 05/13/2023]
Abstract
BACKGROUND A wide variety of specialty textiles are used in health care settings for bedding, clothing, and privacy. The ability of textiles to host or otherwise sequester microbes has been well documented; however, their reciprocal potential for liberating airborne bacteria remains poorly characterized. In response, a multi-season survey of bacterial bioaerosols was conducted in the origin and terminus of residual paths which are specifically designed to isolate soiled hospital textiles as they are moved to laundering. This survey used conventional optical particle counting which incorporated multi-channel fluorescence in conjunction with molecular phylogenetic analyses to characterize the bioaerosols liberated during soiled textile storage--immediately before and after the occupation of a modern hospital. Although outfitted with a HEPA filtration system, the number of airborne particles presenting fluorescing optical signatures consistent with airborne bacteria and fungi significantly increased in textile holding rooms soon after the hospital's commissioning, even though these isolated residual areas rarely host personnel. The bioaerosol liberated during textile storage was characterized using Illumina MiSeq sequencing of bacterial 16S ribosomal ribonucleic acid (rRNA) genes. Gene copies recovered by quantitative PCR from aerosol collected in co-located impingers were consistent with fluorescence gated optical particle counting. RESULTS The relative abundance patterns of proximal bacterial bioaerosol were such that the air in the origin and terminus of textile storage rooms could not be differentiated once the hospital began processing soiled linens. Genes from microbes typically associating with human skin, feces, and hair--Staphylococcus, Propionibacteria, Corynebacteria, Lactobacillus, and Streptococcus spp.--dominated the aerosol abundance profiles in textile holding rooms, which were generally far less diverse than communities recovered from surfaces in patient rooms. CONCLUSIONS These results suggest that aerosol partitioning from the routine handling of soiled textiles can contribute to airborne exposures in the health care environment.
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Affiliation(s)
- Alina Handorean
- Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, USA.
| | - Charles E Robertson
- Department of Molecular Cellular and Developmental Biology, University of Colorado, Boulder, USA.
| | - J Kirk Harris
- Anchutz Medical Center University of Colorado, Denver, USA.
| | - Daniel Frank
- Anchutz Medical Center University of Colorado, Denver, USA.
| | - Natalie Hull
- Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, USA.
| | | | - Mark J Stevens
- Anchutz Medical Center University of Colorado, Denver, USA.
| | | | - Norman R Pace
- Department of Molecular Cellular and Developmental Biology, University of Colorado, Boulder, USA.
| | - Mark Hernandez
- Department of Civil, Environmental and Architectural Engineering, University of Colorado, Boulder, USA.
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Yurtsever A, Sahinkaya E, Aktaş Ö, Uçar D, Çınar Ö, Wang Z. Performances of anaerobic and aerobic membrane bioreactors for the treatment of synthetic textile wastewater. Bioresour Technol 2015; 192:564-573. [PMID: 26093251 DOI: 10.1016/j.biortech.2015.06.024] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 05/30/2015] [Accepted: 06/04/2015] [Indexed: 06/04/2023]
Abstract
This study aims at comparatively evaluating anaerobic and aerobic MBRs for the treatment of azo-dye containing synthetic wastewater. Also, the filtration performances of AnMBR and AeMBR were compared under similar operating conditions. In both MBRs, high COD removal efficiencies were observed. Although almost complete color removal was observed in AnMBR, only partial (30-50%) color removal was achieved in AeMBR. AnMBR was successfully operated up to 9 L/(m(2)h) (LMH) and no chemical cleaning was required at 4.5 LMH for around 50 days. AeMBR was operated successfully up to 20 LMH. The filtration resistance of AnMBR was generally higher compared to AeMBR although reversible fouling rates were comparable. In both MBRs, offline chemical cleaning with NaOCl and sulfuric acid almost completely removed irreversible fouling and the resistances of chemically cleaned membranes were close to those of new membranes.
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Affiliation(s)
- Adem Yurtsever
- Department of Environmental Engineering, Yildiz Technical University, 34220 Istanbul, Turkey
| | - Erkan Sahinkaya
- Bioengineering Department, Istanbul Medeniyet University, Goztepe, 34700 Istanbul, Turkey.
| | - Özgür Aktaş
- Bioengineering Department, Istanbul Medeniyet University, Goztepe, 34700 Istanbul, Turkey
| | - Deniz Uçar
- Department of Environmental Engineering, Harran University, 63300 Osmanbey, Sanliurfa, Turkey
| | - Özer Çınar
- Department of Environmental Engineering, Yildiz Technical University, 34220 Istanbul, Turkey
| | - Zhiwei Wang
- School of Environmental Science and Engineering, Tongji University, Shanghai, PR China
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37
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Scherberger J. Developing a plan to handle clean textiles. Health Facil Manage 2015; 28:42. [PMID: 26638613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Spychała M, Sowińska A, Starzyk J, Masłowski A. Protozoa and metazoa relations to technological conditions of non-woven textile filters for wastewater treatment. Environ Technol 2015; 36:1865-1875. [PMID: 25704123 DOI: 10.1080/09593330.2015.1014863] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The objective of this study was a preliminary identification of basic groups of micro-organisms in the cross-sectional profile of geotextile filters for septic tank effluent (STE) treatment and their relations to technological conditions. Reactors with textile filters treating wastewater were investigated on a semi-technical scale. Filters were vertically situated and STE was filtered through them under hydrostatic pressure at a wastewater surface height of 7-20 cm. Filters were made of four layers of non-woven TS 20 geotextile of 0.9 mm thickness. Various groups of organisms were observed; the most abundant group comprised free-swimming and crawling ciliates, less abundant were stalked ciliates and the least numerous were nematodes. The individual counts of all groups of micro-organisms investigated during the study were variable according to time and space. The high abundance of Opercularia, a commonly observed genus of stalked ciliates, was related to the high efficiency of wastewater treatment and dissolved oxygen concentration of about 1.0 g/m3. Numbers of free-swimming and crawling ciliates had a tendency to decrease in relation to the depth of filter cross-sectional profile. The variability in counts of particular groups of organisms could be related to the local stress conditions. No correlation between identified organism count and total mass concentration in the cross-sectional filter profile was found.
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Affiliation(s)
- Marcin Spychała
- a Department of Hydraulic and Sanitary Engineering , Poznan University of Life Sciences , Piątkowska St. 94A, Poznań 60-649 , Poland
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39
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Perelshtein I, Lipovsky A, Perkas N, Tzanov T, Аrguirova M, Leseva M, Gedanken A. Making the hospital a safer place by sonochemical coating of all its textiles with antibacterial nanoparticles. Ultrason Sonochem 2015; 25:82-88. [PMID: 25577972 DOI: 10.1016/j.ultsonch.2014.12.012] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 10/02/2014] [Accepted: 12/21/2014] [Indexed: 06/04/2023]
Abstract
The ability to scale-up the sonochemical coating of medical textiles with antibacterial nanoparticles is demonstrated in the current paper. A roll-to-roll pilot installation to coat textiles was built taking into consideration the requirements of the sonochemical process. A long-run experiment was conducted in which 2500 m of fabric were coated with antibacterial ZnO nanoparticles (NPs). The metal oxide NPs were deposited from an ethanol:water solution. In this continuous process a uniform concentration of coated NPs over the length/width of the fabric was achieved. The antibacterial efficiency of the sonochemically-coated textiles was validated in a hospital environment by a reduction in the occurrence of nosocomial infections. NP-coated bed sheets, patient gowns, pillow cover, and bed covers were used by 21 patients. For comparison 16 patients used regular textiles. The clinical data indicated the reduced occurrence of hospital-acquired infections when using the metal oxide NP-coated textiles. In order to reduce the cost of the coating process and considering safety issues during manufacturing, the solvent (ethanol:water) (9:1 v:v) used for the long-run experiment, was replaced by water. Although lesser amounts of ZnO NPs were deposited on the fabric in the water-based process the antibacterial activity of the textiles was preserved due to the smaller size of the particles.
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Affiliation(s)
- Ilana Perelshtein
- Department of Chemistry and Kanbar Laboratory for Nanomaterials, Bar-Ilan University Center for Advanced Materials and Nanotechnology, Ramat-Gan, Israel.
| | - Anat Lipovsky
- Department of Chemistry and Kanbar Laboratory for Nanomaterials, Bar-Ilan University Center for Advanced Materials and Nanotechnology, Ramat-Gan, Israel.
| | - Nina Perkas
- Department of Chemistry and Kanbar Laboratory for Nanomaterials, Bar-Ilan University Center for Advanced Materials and Nanotechnology, Ramat-Gan, Israel.
| | - Tzanko Tzanov
- Universitat Politècnica de Catalunya, Edifici Gaia, Pg. Ernest Lluch/Rambla Sant Nebridi s/n, 08222 Terrassa, Spain.
| | - M Аrguirova
- Burn and Plastic Surgery Clinic, MHATEM, N.I. Pirogov, Sofia, Bulgaria.
| | - M Leseva
- Clinical Microbiological Laboratory, MHATEM, N.I. Pirogov, Sofia, Bulgaria.
| | - Aharon Gedanken
- Department of Chemistry and Kanbar Laboratory for Nanomaterials, Bar-Ilan University Center for Advanced Materials and Nanotechnology, Ramat-Gan, Israel; The Department of Materials Science & Engineering, National Cheng Kung University, Tainan 70101, Taiwan.
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Mitchell A, Spencer M, Edmiston C. Role of healthcare apparel and other healthcare textiles in the transmission of pathogens: a review of the literature. J Hosp Infect 2015; 90:285-92. [PMID: 25935701 PMCID: PMC7132459 DOI: 10.1016/j.jhin.2015.02.017] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 02/25/2015] [Indexed: 11/13/2022]
Abstract
Healthcare workers (HCWs) wear uniforms, such as scrubs and lab coats, for several reasons: (1) to identify themselves as hospital personnel to their patients and employers; (2) to display professionalism; and (3) to provide barrier protection for street clothes from unexpected exposures during the work shift. A growing body of evidence suggests that HCWs' apparel is often contaminated with micro-organisms or pathogens that can cause infections or illnesses. While the majority of scrubs and lab coats are still made of the same traditional textiles used to make street clothes, new evidence suggests that current innovative textiles function as an engineering control, minimizing the acquisition, retention and transmission of infectious pathogens by reducing the levels of bioburden and microbial sustainability. This paper summarizes recent literature on the role of apparel worn in healthcare settings in the acquisition and transmission of healthcare-associated pathogens. It proposes solutions or technological interventions that can reduce the risk of transmission of micro-organisms that are associated with the healthcare environment. Healthcare apparel is the emerging frontier in epidemiologically important environmental surfaces.
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Affiliation(s)
- A Mitchell
- International Safety Center, The Public's Health, Apopka, FL, USA.
| | - M Spencer
- Infection Preventionist Consultants, Boston, MA, USA
| | - C Edmiston
- Department of Surgery, Surgical Microbiology and Hospital Epidemiology Research Laboratory, Medical College of Wisconsin, Milwaukee, WI, USA
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41
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Spychała M, Starzyk J. Bacteria in non-woven textile filters for domestic wastewater treatment. Environ Technol 2015; 36:937-945. [PMID: 25318829 DOI: 10.1080/09593330.2014.969326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The objective of this study was preliminary identification of heterotrophic and ammonia oxidizing bacteria (AOB) cell concentration in the cross-sectional profile of geotextile filters for wastewater treatment. Filters of thicknesses 3.6 and 7.2 mm, made of non-woven textile TS20, were supplied with septic tank effluent and intermittently dosed and filtered under hydrostatic pressure. The cumulative loads of chemical oxygen demand (COD) and total solids were about 1.36 and 1.06 kg/cm2, respectively. The filters under analysis reached a relatively high removal efficiency for organic pollution 70-90% for biochemical oxygen demand (BOD5) and 60-85% for COD. The ammonia nitrogen removal efficiency level proved to be unstable (15-55%). Biomass samples for dry mass identification were taken from two regions: continuously flooded with wastewater and intermittently flooded with wastewater. The culturable heterotrophic bacteria were determined as colony-forming units (CFUs) on microbiological-selective media by means of the plate method. AOB and nitrite oxidizing bacteria (NOB) were examined using the FISH technique. A relatively wide range of heterotrophic bacteria was observed from 7.4×10(5)/cm2 to 3.8×10(6)/cm2 in geotextile layers. The highest concentration of heterotrophic bacteria (3.8×10(6)/cm2) was observed in the first layer of the textile filter. AOB were identified occasionally--about 8-15% of all bacteria colonizing the last filter layer, but occasionally much higher concentrations and ammonia nitrogen efficiency were achieved. Bacteria oxidizing nitrite to nitrate were not observed. The relation of total and organic fraction of biomass to culturable heterotrophic bacteria was also found.
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Affiliation(s)
- Marcin Spychała
- a Department of Hydraulic and Sanitary Engineering , Poznan University of Life Sciences , 60-649 Poznań, Piątkowska St. 94A, Poland
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Wybrańska K, Paczesny J, Serejko K, Sura K, Włodyga K, Dzięcielewski I, Jones ST, Śliwa A, Wybrańska I, Hołyst R, Scherman OA, Fiałkowski M. Gold-oxoborate nanocomposites and their biomedical applications. ACS Appl Mater Interfaces 2015; 7:3931-3939. [PMID: 25625378 DOI: 10.1021/am508979y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A novel inorganic nanocomposite material, called BOA, which has the form of small building blocks composed of gold nanoparticles embedded in a polyoxoborate matrix, is presented. It is demonstrated that cotton wool decorated with the BOA nanocomposite displays strong antibacterial activity toward both Gram-positive and -negative bacteria strains. Importantly, the modified cotton does not release any toxic substances, and the bacteria are killed upon contact with the fibers coated with the BOA. Toxicity tests show that the nanocomposite--in spite of its antiseptic properties--is harmless for mammalian cells. The presented method of surface modification utilizes mild, environmentally friendly fabrication conditions. Thus, it offers a facile approach to obtain durable nontoxic antiseptic coatings for biomedical applications.
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Affiliation(s)
- Katarzyna Wybrańska
- Institute of Physical Chemistry of the Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland
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Demir B, Cerkez I, Worley SD, Broughton RM, Huang TS. N-Halamine-modified antimicrobial polypropylene nonwoven fabrics for use against airborne bacteria. ACS Appl Mater Interfaces 2015; 7:1752-7. [PMID: 25587845 DOI: 10.1021/am507329m] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Disinfecting, nonbleaching compound 1-chloro-2,2,5,5-tetramethyl-4-imidazolidinone (MC) was uniformly coated onto polypropylene melt-blown nonwoven fabrics having basis-weights of 22 and 50 g/m(2) in order to impart antimicrobial properties via a pad-dry technique. The antimicrobial efficacies of the tested fabrics loaded with MC compound were evaluated against bioaerosols of Staphylococcus aureus and Escherichia coli O157:H7 utilizing a colony counting method. It was determined that both types of coated fabrics exhibited superior antimicrobial efficacy upon exposure to aerosol generation for 3 h. The effect of the coating on air permeability was found to be minimal. Samples were stable for a 6 month time period when they were stored in darkness. However, when the fabrics were exposed to fluorescent light, partial chlorine loss was observed. The MC-coated fabrics exhibited great potential for use in protective face masks and air filters to combat airborne pathogens.
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Affiliation(s)
- Buket Demir
- Department of Chemistry and Biochemistry, Auburn University , Auburn, Alabama 36849, United States
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44
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Yazhini KB, Prabu HG. Antibacterial activity of cotton coated with ZnO and ZnO-CNT composites. Appl Biochem Biotechnol 2014; 175:85-92. [PMID: 25240851 DOI: 10.1007/s12010-014-1257-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2014] [Accepted: 09/10/2014] [Indexed: 11/26/2022]
Abstract
With the growing public health awareness of the pathogenic effects and strain formations caused by microorganisms, there is an increasing need for antibacterial materials in many applications. Zinc oxide (ZnO)-1,2,3,4-butanetetracarboxylic acid (BTCA) and ZnO-BTCA-carbon nanotube (CNT) composites were synthesized by simple stirring method. The synthesized materials were coated on cotton fabric by pad-dry-cure method separately. The coated fabrics were characterized by FT-IR analysis that revealed the cross-linking in the composites. The fabrics were screened for antibacterial activity by agar well diffusion method against gram positive Staphylococcus aureus and gram negative Escherichia coli. The results showed that the ZnO-BTCA-CNT-coated fabric has improved antibacterial activity when compared with the ZnO-BTCA-coated fabric.
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Affiliation(s)
- K Bharathi Yazhini
- Department of Industrial Chemistry, School of Chemical Sciences, Alagappa University, Karaikudi, 630 003, India
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45
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Lee J, Lopes JA, Pascall MA. Recovery of microorganisms on fabric materials after low water temperature washing with non-oxidizing acidic bleaching formulation by culture method. J Water Health 2014; 12:418-425. [PMID: 25252345 DOI: 10.2166/wh.2014.194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The recovery of microorganisms to different fabrics was evaluated after a washing process combined with a food-grade non-oxidizing acidic formulation and low washing water temperature. Cotton, polyester and a polyester/cotton blend fabric samples were inoculated with Escherichia coli, Listeria innocua and Saccharomyces cerevisiae, then dried for 1 day. They were separately placed in a simulated fabric washer and decontaminated for 1 and 10 min with the acidic formulation at 23 °C water washing temperature. The combination of direct detecting and dilution methods was used to detect survivors on fabrics. The use of ≥ 0.1% acidic formulation in the washing process significantly increased the efficacy of the washing for all fabric samples. Microorganisms on the cotton and mixed fabric appeared to bind more strongly and were more resistant to the washing process. No viability was observed on the fabric swatches at 1 cfu/sample detection limit when the washing process was combined with 0.5% acidic formulation in the 10 min washing cycle. These findings can be used to increase the efficiency of sanitizing fabrics in an environmentally friendly way, for remove harmful microorganisms from them and reduce cross-contamination.
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Affiliation(s)
- Jaesung Lee
- Department of Food Science and Technology, Ohio State University, 2015 Fyffe Road, Columbus, OH 43210, USA E-mail:
| | - John A Lopes
- Microcide Inc., 2727 Second Avenue, Detroit, MI 48201, USA
| | - Melvin A Pascall
- Department of Food Science and Technology, Ohio State University, 2015 Fyffe Road, Columbus, OH 43210, USA E-mail:
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Li Z, Tang H, Yuan W, Song W, Niu Y, Yan L, Yu M, Dai M, Feng S, Wang M, Liu T, Jiang P, Fan Y, Wang ZL. Ag nanoparticle-ZnO nanowire hybrid nanostructures as enhanced and robust antimicrobial textiles via a green chemical approach. Nanotechnology 2014; 25:145702. [PMID: 24622377 DOI: 10.1088/0957-4484/25/14/145702] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A new approach for fabrication of a long-term and recoverable antimicrobial nanostructure/textile hybrid without increasing the antimicrobial resistance is demonstrated. Using in situ synthesized Ag nanoparticles (NPs) anchored on ZnO nanowires (NWs) grown on textiles by a 'dip-in and light-irradiation' green chemical method, we obtained ZnONW@AgNP nanocomposites with small-size and uniform Ag NPs, which have shown superior performance for antibacterial applications. These new Ag/ZnO/textile antimicrobial composites can be used for wound dressings and medical textiles for topical and prophylactic antibacterial treatments, point-of-use water treatment to improve the cleanliness of water and antimicrobial air filters to prevent bioaerosols accumulating in ventilation, heating, and air-conditioning systems.
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Affiliation(s)
- Zhou Li
- Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, People's Republic of China
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47
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Petkova P, Francesko A, Fernandes MM, Mendoza E, Perelshtein I, Gedanken A, Tzanov T. Sonochemical coating of textiles with hybrid ZnO/chitosan antimicrobial nanoparticles. ACS Appl Mater Interfaces 2014; 6:1164-1172. [PMID: 24383795 DOI: 10.1021/am404852d] [Citation(s) in RCA: 92] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Textiles are good substrates for growth of microorganisms especially under moisture and temperature conditions found in hospitals. Microbial shedding from the body occurs continuously at contact of the patient with textile materials used in medical practices, contributing to the occurrence of hospital acquired infections. Thus, the use of efficient antimicrobial textiles is necessary to prevent the transfer of pathogens and the infection incidence. In this work, hybrid antimicrobial coatings were generated on cotton fabrics by means of a one-step simultaneous sonochemical deposition of ZnO nanoparticles (NPs) and chitosan. The process was further optimized in terms of reagents concentration and processing time in order to improve the antibacterial properties of the fabric and ensure their biocompatibility. The highest antibacterial activity of the fabrics against two medically relevant bacterial species was achieved in a 30 min sonochemical coating process using 2 mM ZnO NPs suspension. When chitosan was simultaneously deposited with the same amount of ZnO, the obtained hybrid NPs coating displayed higher by 48 and 17% antibacterial activity against Staphylococcus aureus and Escherichia coli, respectively. The presence of biopolymer also improved the durability of the antimicrobial effect of the coatings by 21% for Staphylococcus aureus and 40% for Escherichia coli, evaluated after applying multiple washing cycles at hospital laundering regimes. Finally, 87% biocompatibility improvement supported by fibroblast viability was observed for the hybrid ZnO/chitosan coating compared to the steady decrease of cells viability over one week in contact with the fabrics coated with ZnO alone.
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Affiliation(s)
- Petya Petkova
- Grup de Biotecnologia Molecular i Industrial, Department of Chemical Engineering, Universitat Politècnica de Catalunya , Rambla Sant Nebridi 22, 08222, Terrassa, Barcelona, Spain
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48
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Bartz S, Tondo EC. Evaluation of two recommended disinfection methods for cleaning cloths used in food services of southern Brazil. Braz J Microbiol 2014; 44:765-70. [PMID: 24516443 PMCID: PMC3910186 DOI: 10.1590/s1517-83822013000300015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2012] [Accepted: 11/13/2012] [Indexed: 11/21/2022] Open
Abstract
In the State of Rio Grande do Sul (RS), Southern Brazil, a good manufacturing practices regulation was published recommending two disinfection methods for cleaning cloths used in food services. The aim of the present study was to evaluate the efficacy of those methods. Cleaning cloths were sampled without prior notice at food services, on common working days. For the analyses, the cloths were divided in two sub-samples, being one of them microbiologically analyzed. The second sub-sample was further divided in two pieces and submitted to hand washing for two minutes. After that, one piece was boiled in water for 15 min and the other one was soaked in a 200 ppm sodium hypochlorite solution for 15 min. Both pieces of cloth were submitted to microbiological analyses. Cleaning cloths presented total aerobic mean counts of 6.9 ± 6.7 log/cm(2). All cleaning cloths presented coliform contamination, and 40% demonstrated mean counts of 6.2 ± 5.6 log/cm(2). Presumptive S. aureus mean counts of 5.5 ± 4.9 log/cm(2) were found. No statistic correlation was observed among the number of meals served daily in the food services and the microbiological contamination levels. After washing and disinfection, microbiological counts were significantly (p < 0.05) reduced by both methods, achieving an approximately 5 log reduction. The reductions achieved by the sodium hypochlorite soaking method and the boiling method were not significantly different. Thus, it was possible to conclude that both recommended methods were suitable to disinfect cleaning cloths used in food services.
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Affiliation(s)
- Sabrina Bartz
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Eduardo Cesar Tondo
- Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil
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Caldeira E, Piskin E, Granadeiro L, Silva F, Gouveia IC. Biofunctionalization of cellulosic fibres with L-cysteine: assessment of antibacterial properties and mechanism of action against Staphylococcus aureus and Klebsiella pneumoniae. J Biotechnol 2013; 168:426-435. [PMID: 24432376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The main purpose of this work is to obtain a cotton-based textile material functionalized with L-cysteine (L-cys) to achieve an antimicrobial effect with potential application in biomedical, geriatric or pediatric textiles. The binding capacity of L-cys to cotton fibres was assessed through different functionalization strategies--surface activation and exhaustion processes. A subsequent analysis of the possible antibacterial action against Staphylococcus aureus and Klebsiella pneumoniae was performed according with the Japanese International standard (JISL, 2008). To determine the mechanism of action of L-cys on the selected strains, flow cytometry was used. The results revealed that the exhaustion process was performed with success to confer bioactivity to the treated fabric, as assessed by an effective antibacterial effect against both Gram-positive and Gram-negative bacteria, and successfully linkage of L-cys was observed via FTIR with a durable effect demonstrated after the washing tests (fastness to washing). It was also observed that L-cys exerts a bacteriostatic effect against both bacterial strains, since there were alterations in the metabolic activity of the microorganisms after the application of the bioactive textile which was shown by the CTC (cyanoditolyl tetrazolium chloride) staining used in flow cytometry. This study shows a new and successful biotechnological process to develop antibacterial textiles through the functionalization of cotton fibres with L-cys which presents a broad range of applications in healthcare, since L-cys is a natural antibacterial compound, non-toxic and affects pathogenic bacteria related to hospital infections.
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50
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[Giving pathogens no chance]. Kinderkrankenschwester 2013; 32:235-7. [PMID: 23822063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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