1
|
Ren Z, Han J, Zhang X, Yan Z, Wei Q. Effective of different industrial disinfection in subzero cold-chain environment. Sci Rep 2024; 14:12651. [PMID: 38825618 PMCID: PMC11144690 DOI: 10.1038/s41598-024-62204-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Accepted: 05/14/2024] [Indexed: 06/04/2024] Open
Abstract
Effective disinfection methods are crucial in the cold chain transportation process of food due to the specificity of temperature and the diversity of contaminated flora. The objective of this study was to investigate the sanitizing effect of different disinfectants on various fungi at - 20 °C to achieve accurate disinfection of diverse bacterial populations. Peracetic acid, hydrogen peroxide, and potassium bisulfate were selected as low-temperature disinfectants and were combined with antifreeze. The sanitizing effect of these cryogenic disinfectants on pathogens such as Bacillus subtilis black variant spores (ATCC9372), Staphylococcus aureus (ATCC 6538), Candida albicans (ATCC 10231), Escherichia coli (8099), and poliovirus (PV-1) was sequentially verified by bactericidal and virus inactivation experiments. After a specified time of disinfection, a neutralizing agent was used to halt the sanitizing process. The study demonstrates that different disinfectants exhibit selective effects during the low-temperature disinfection process. Peracetic acid, hydrogen peroxide, and potassium monopersulfate are suitable for the low-temperature environmental disinfection of bacterial propagules, viruses, and fungal contaminants. However, for microorganisms with strong resistance to spores, a low-temperature disinfectant based on peracetic acid should be chosen for effective disinfection treatment. Our results provide a valuable reference for selecting appropriate disinfectants to sanitize various potential pathogens in the future.
Collapse
Affiliation(s)
- Zhe Ren
- The Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Jie Han
- The Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Xue Zhang
- The Chinese PLA Center for Disease Control and Prevention, Beijing, China
| | - Zheng Yan
- Tianjin Medical University, Tianjin, China
| | - QiuHua Wei
- The Chinese PLA Center for Disease Control and Prevention, Beijing, China.
| |
Collapse
|
2
|
Nerber HN, Sorg JA. The small acid-soluble proteins of spore-forming organisms: similarities and differences in function. Anaerobe 2024; 87:102844. [PMID: 38582142 DOI: 10.1016/j.anaerobe.2024.102844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 03/22/2024] [Accepted: 03/27/2024] [Indexed: 04/08/2024]
Abstract
The small acid-soluble proteins are found in all endospore-forming organisms and are a major component of spores. Through their DNA binding capabilities, the SASPs shield the DNA from outside insults (e.g., UV and genotoxic chemicals). The absence of the major SASPs results in spores with reduced viability when exposed to UV light and, in at least one case, the inability to complete sporulation. While the SASPs have been characterized for decades, some evidence suggests that using newer technologies to revisit the roles of the SASPs could reveal novel functions in spore regulation.
Collapse
Affiliation(s)
- Hailee N Nerber
- Department of Biology, Texas A&M University, College Station, TX, United States
| | - Joseph A Sorg
- Department of Biology, Texas A&M University, College Station, TX, United States.
| |
Collapse
|
3
|
Mokudai T, Kawada M, Tadaki D, Hirano-Iwata A, Kanetaka H, Fujimori H, Takemoto E, Niwano M. Radical generation and bactericidal activity of nanobubbles produced by ultrasonic irradiation of carbonated water. ULTRASONICS SONOCHEMISTRY 2024; 103:106809. [PMID: 38364483 PMCID: PMC10879770 DOI: 10.1016/j.ultsonch.2024.106809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2024] [Revised: 02/04/2024] [Accepted: 02/13/2024] [Indexed: 02/18/2024]
Abstract
Our previous study showed that nanobubbles (NBs) encapsulating CO2 gas have bactericidal activity due to reactive oxygen species (ROS) (Yamaguchi et al., 2020). Here, we report that bulk NBs encapsulating CO2 can be efficiently generated by ultrasonically irradiating carbonated water using a piezoelectric transducer with a frequency of 1.7 MHz. The generated NBs were less than 100 nm in size and had a lifetime of 500 h. Furthermore, generation of ROS in the NB suspension was investigated using electron spin resonance spectroscopy and fluorescence spectrometry. The main ROS was found to be the hydroxyl radical, which is consistent with our previous observations. The bactericidal activity lasted for at least one week. Furthermore, a mist generated by atomizing the NB suspension with ultrasonic waves was confirmed to have the same bactericidal activity as the suspension itself. We believe that the strong, persistent bactericidal activity and radical generation phenomenon are unique to NBs produced by ultrasonic irradiation of carbonated water. We propose that entrapped CO2 molecules strongly interact with water at the NB interface to weaken the interface, and high-pressure CO2 gas erupts from this weakened interface to generate ROS with bactericidal activity.
Collapse
Affiliation(s)
- Takayuki Mokudai
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan; Joining and Welding Research Institute, Osaka University, Osaka 567-0047, Japan
| | - Michi Kawada
- Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
| | - Daisuke Tadaki
- Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
| | - Ayumi Hirano-Iwata
- Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
| | - Hiroyasu Kanetaka
- Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
| | - Hiroshi Fujimori
- Planning & Development Department, Takemoto Yohki Co., Ltd., Tokyo 111-0036, Japan
| | - Emiko Takemoto
- Planning & Development Department, Takemoto Yohki Co., Ltd., Tokyo 111-0036, Japan
| | - Michio Niwano
- Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan; Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan.
| |
Collapse
|
4
|
Paull GC, Lee CJ, Tyler CR. Beyond compliance: harmonising research and husbandry practices to improve experimental reproducibility using fish models. Biol Rev Camb Philos Soc 2024; 99:253-264. [PMID: 37817305 DOI: 10.1111/brv.13020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 09/19/2023] [Accepted: 09/21/2023] [Indexed: 10/12/2023]
Abstract
Reproducibility in animal research is impacted by the environment, by husbandry practices in the laboratory and by the animals' provenance. These factors, however, are often not adequately considered by researchers. A disconnect between researchers and animal care staff can result in inappropriate housing and husbandry decisions for scientific studies with those animals. This is especially the case for the research in neuro-behaviour, epigenetics, and the impact of climate change, as heritable phenotypic, behavioural or physiological changes are known to result from the animals' environmental housing, husbandry, provenance and prior experience. This can lead to greater variation (even major differences) in data outcomes among studies, driving scientific uncertainties. Herein, we illustrate some of the endpoints measured in fish studies known to be intrinsically linked to the environment and husbandry conditions and assess the significance of housing and husbandry practice decisions for research adopting these endpoints for different fish species. We highlight the different priorities and challenges faced by researchers and animal care staff and how harmonising their activities and building greater understanding of how husbandry practices affect the fish will improve reproducibility in research outcomes. We furthermore illustrate how improving engagement between stakeholders, including regulatory bodies, can better underpin fish husbandry decisions and where researchers could help to drive best husbandry practices through their own research with fish models.
Collapse
Affiliation(s)
- Gregory C Paull
- Biosciences, Geoffrey Pope Building, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK
| | - Carole J Lee
- Biosciences, Geoffrey Pope Building, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK
| | - Charles R Tyler
- Biosciences, Geoffrey Pope Building, University of Exeter, Stocker Road, Exeter, EX4 4QD, UK
| |
Collapse
|
5
|
Jain N, Umar TP, Sayad R, Mokresh ME, Tandarto K, Siburian R, Liana P, Laivacuma S, Reinis A. Monkeypox Diagnosis in Clinical Settings: A Comprehensive Review of Best Laboratory Practices. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2024; 1451:253-271. [PMID: 38801583 DOI: 10.1007/978-3-031-57165-7_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
An outbreak of monkeypox (Mpox) was reported in more than 40 countries in early 2022. Accurate diagnosis of Mpox can be challenging, but history, clinical findings, and laboratory diagnosis can establish the diagnosis. The pre-analytic phase of testing includes collecting, storing, and transporting specimens. It is advised to swab the lesion site with virus transport medium (VTM) containing Dacron or polyester flock swabs from two different sites. Blood, urine, and semen samples may also be used. Timely sampling is necessary to obtain a sufficient amount of virus or antibodies. The analytical phase of infectious disease control involves diagnostic tools to determine the presence of the virus. While polymerase chain reaction (PCR) is the gold standard for detecting Mpox, genome sequencing is for identifying new or modified viruses. As a complement to these methods, isothermal amplification methods have been designed. ELISA assays are also available for the determination of antibodies. Electron microscopy is another effective diagnostic method for tissue identification of the virus. Wastewater fingerprinting provides some of the most effective diagnostic methods for virus identification at the community level. The advantages and disadvantages of these methods are further discussed. Post-analytic phase requires proper interpretation of test results and the preparation of accurate patient reports that include relevant medical history, clinical guidelines, and recommendations for follow-up testing or treatment.
Collapse
Affiliation(s)
- Nityanand Jain
- Faculty of Medicine, Riga Stradiņš University, Dzirciema Street 16, Riga, 1007, Latvia.
- Joint Microbiology Laboratory, Pauls Stradins Clinical University Hospital, Pilsonu Street 13, Riga, 1002, Latvia.
| | - Tungki Pratama Umar
- Faculty of Medicine, Sriwijaya University, Dr. Mohammad Ali Street-RSMH Complex, Palembang, 30126, Indonesia.
| | - Reem Sayad
- Faculty of Medicine, Assiut University, Saad Zaghloul, Assiut, 71515, Egypt
| | - Muhammed Edib Mokresh
- Faculty of International Medicine, University of Health Sciences, Tibbiye, Istanbul, 34668, Turkey
| | - Kevin Tandarto
- Faculty of Medicine and Health Sciences, Atma Jaya Catholic University of Indonesia, Pluit Raya Street No. 2, North Jakarta, Special Capital Region of Jakarta, 14440, Indonesia
| | - Reynold Siburian
- Faculty of Medicine, Sriwijaya University, Dr. Mohammad Ali Street-RSMH Complex, Palembang, 30126, Indonesia
| | - Phey Liana
- Department of Clinical Pathology, Faculty of Medicine, Sriwijaya University-Mohammad Hoesin General Hospital, Palembang, 30126, Indonesia
| | - Sniedze Laivacuma
- Faculty of Medicine, Riga Stradiņš University, Dzirciema Street 16, Riga, 1007, Latvia
- Department of Infectious Diseases, Riga East Clinical University Hospital, Hipokrata Street 2, Riga, 1038, Latvia
| | - Aigars Reinis
- Faculty of Medicine, Riga Stradiņš University, Dzirciema Street 16, Riga, 1007, Latvia
- Joint Microbiology Laboratory, Pauls Stradins Clinical University Hospital, Pilsonu Street 13, Riga, 1002, Latvia
| |
Collapse
|
6
|
Hiep NT, Nguyen MK, Nhut HT, Hung NTQ, Manh NC, Lin C, Chang SW, Um MJ, Nguyen DD. A review on sterilization methods of environmental decontamination to prevent the coronavirus SARS-CoV-2 (COVID-19 virus): A new challenge towards eco-friendly solutions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 904:166021. [PMID: 37543323 DOI: 10.1016/j.scitotenv.2023.166021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 06/13/2023] [Accepted: 08/01/2023] [Indexed: 08/07/2023]
Abstract
In recent years, the COVID-19 pandemic is currently wreaking havoc on the planet. SARS-CoV-2, the Severe Acute Respiratory Syndrome Coronavirus, is the current term for this outbreak. Reports about this novel coronavirus have been presented since the pandemic's breakout, and they have demonstrated that it transmits rapidly from person to person, primarily by droplets in the air. Findings have illustrated that SARS-CoV-2 can survive on surfaces from hours to days. Therefore, it is essential to find practical solutions to reduce the virus's impact on human health and the environment. This work evaluated common sterilization methods that can decontaminate the environment and items. The goal is that healthcare facilities, disease prevention organizations, and local communities can overcome the new challenge of finding eco-friendly solutions. Further, a foundation of information encompassing various sterilization procedures and highlighting their limits to choose the most appropriate method to stop disease-causing viruses in the new context has been presented. The findings of this crucial investigation contribute to gaining insight into the comprehensive sterilization approaches against the coronavirus for human health protection and sustainable environmental development.
Collapse
Affiliation(s)
- Nguyen Trung Hiep
- Research Institute for Sustainable Development, Ho Chi Minh University of Natural Resources and Environment, 236B Le Van Sy, Ward 1, Tan Binh District, Ho Chi Minh City 700000, Viet Nam
| | - Minh-Ky Nguyen
- Faculty of Environment and Natural Resources, Nong Lam University, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam; Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - Huynh Tan Nhut
- Faculty of Environment and Natural Resources, Nong Lam University, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam
| | - Nguyen Tri Quang Hung
- Faculty of Environment and Natural Resources, Nong Lam University, Linh Trung Ward, Thu Duc City, Ho Chi Minh City 700000, Viet Nam.
| | - Nguyen Cong Manh
- Department of Aquatic and Atmospheric Environment Research, Research Institute of Biotechnology and Environment, Nong Lam University, Ho Chi Minh City 700000, Viet Nam
| | - Chitsan Lin
- Department of Marine Environmental Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 81157, Taiwan
| | - S Woong Chang
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea
| | - Myoung Jin Um
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea
| | - D Duc Nguyen
- Department of Civil & Energy System Engineering, Kyonggi University, Suwon 16227, South Korea; Faculty of Environmental and Food Engineering, Nguyen Tat Thanh University, 300A Nguyen Tat Thanh, District 4, Ho Chi Minh City 755414, Viet Nam.
| |
Collapse
|
7
|
Loret S, Habib B, Romain P, Roba A, Reboul A. Prevention of horizontal transfer of laboratory plasmids to environmental bacteria: comparison of the effectiveness of a few disinfection approaches to degrade DNA. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:89369-89380. [PMID: 37450185 DOI: 10.1007/s11356-023-28733-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 07/07/2023] [Indexed: 07/18/2023]
Abstract
The routine work of any molecular biology laboratory includes the daily use of microorganisms, including strains of E. coli, transformed with a variety of plasmids expressing at least one antibiotic resistance gene (ARG). Therefore, to avoid the accidental release of ARGs into environmental water, methods for disinfection of liquid laboratory waste must be effective in destroying nucleic acids. In support of this recommendation, the origin of replication of Enterobacteriaceae plasmids has been detected in strains of non-Enterobacteriaceae bacteria isolated from wastewater from laboratories and research institutes, suggesting that interspecific transfer of laboratory plasmids had occurred. Using quantitative polymerase chain reaction, we determined the decimal reduction value (D value, expressed as concentration of disinfectant or length of physical treatment) of several decontamination methods for their DNA degradation effect on cultures of E. coli Top10 transformed with a kanamycin resistant plasmid (pET28A + or pEGFP-C2). The estimated D values were 0.7 M for sulfuric acid, 6.3% for a commercial P3 disinfectant, 25 min for steam sterilization at 121 °C, and 49 min for disinfection by UVC. A 20-min treatment of bacteria cultures with a final concentration of 1-10% sodium hypochlorite was found to be ineffective in completely destroying a bacteria plasmid gene marker (coding for the pBR322 origin of replication). Residual DNA from NaClO-treated cells was 60%, while it decreased under 10% using the commercial disinfectant P3 diluted at 5%. As the degradation was incomplete in both cases, we recommend avoiding discharge of disinfected liquid waste to wastewater (even after chemical neutralization) without additional plasmid destruction treatment, to prevent horizontal transfer of laboratory ARGs to environmental bacteria.
Collapse
Affiliation(s)
- Suzanne Loret
- Health and Safety Department, Namur Research Institute for Life Science (NARILIS), University of Namur (UNamur), Biosafety Office, Rue de Bruxelles 61, B 5000, Namur, Belgium.
| | - Boutaina Habib
- Science Faculty, University Mohammed V, Avenue Ibn Batouta, BP 1014, Rabat, Morocco
| | - Pierre Romain
- Research Unit in Biology of Microorganisms (URBM), Namur Research Institute for Life Science (NARILIS), University of Namur (UNamur), Rue de Bruxelles 61, B 5000 , Namur, Belgium
| | - Agnès Roba
- Research Unit in Biology of Microorganisms (URBM), Namur Research Institute for Life Science (NARILIS), University of Namur (UNamur), Rue de Bruxelles 61, B 5000 , Namur, Belgium
| | - Angéline Reboul
- Research Unit in Biology of Microorganisms (URBM), Namur Research Institute for Life Science (NARILIS), University of Namur (UNamur), Rue de Bruxelles 61, B 5000 , Namur, Belgium
| |
Collapse
|
8
|
Lamba A, Kopel J, Westenberg D, Kapila S. Fatty acids, esters, and biogenic oil disinfectants: novel agents against bacteria. Proc AMIA Symp 2023; 36:375-379. [PMID: 37091766 PMCID: PMC10120445 DOI: 10.1080/08998280.2023.2167191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
For hundreds of years, disinfectants have comprised a variety of active chemical agents that destroy microorganisms through a wide spectrum of mechanisms. In recent years, there has been growing interest in novel disinfectants. One novel method for disinfectant is aerosols. Since the beginning of the 20th century, aerosols produced by the volatilization and subsequent recondensation of oil vapors have been utilized as obscurants (smoke) screens during military operations. Specifically, a petroleum middle distillate, known as the FOG oil, has been used in the US military battlefield to create obscurant smoke screens. Biogenic oils are non-petroleum-based oils that resemble FOG oil in terms of their physical characteristics. Furthermore, FOG and biogenic oils have characteristics that make them preferable to other disinfectants that are frequently employed. In this review, we examine the antimicrobial activities of mineral oils and biogenic oil esters aerosols/vapors as novel disinfectants against bacteria and other microorganisms.
Collapse
Affiliation(s)
- Aruna Lamba
- Department of Microbiology, Missouri University of Science and Technology, Rolla, Missouri
| | - Jonathan Kopel
- School of Medicine, Texas Tech University Health Sciences Center, Lubbock, Texas
| | - David Westenberg
- Department of Microbiology, Missouri University of Science and Technology, Rolla, Missouri
| | - Shubhender Kapila
- Department of Chemistry, Missouri University of Science and Technology, Rolla, Missouri
| |
Collapse
|
9
|
Gu Z, Han J, Zhang L, Wang H, Luo X, Meng X, Zhang Y, Niu X, Lan Y, Wu S, Cao J, Lichtfouse E. Unanswered questions on the airborne transmission of COVID-19. ENVIRONMENTAL CHEMISTRY LETTERS 2023; 21:725-739. [PMID: 36628267 PMCID: PMC9816530 DOI: 10.1007/s10311-022-01557-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
UNLABELLED Policies and measures to control pandemics are often failing. While biological factors controlling transmission are usually well explored, little is known about the environmental drivers of transmission and infection. For instance, respiratory droplets and aerosol particles are crucial vectors for the airborne transmission of the severe acute respiratory syndrome coronavirus 2, the causation agent of the coronavirus 2019 pandemic (COVID-19). Once expectorated, respiratory droplets interact with atmospheric particulates that influence the viability and transmission of the novel coronavirus, yet there is little knowledge on this process or its consequences on virus transmission and infection. Here we review the effects of atmospheric particulate properties, vortex zones, and air pollution on virus survivability and transmission. We found that particle size, chemical constituents, electrostatic charges, and the moisture content of airborne particles can have notable effects on virus transmission, with higher survival generally associated with larger particles, yet some viruses are better preserved on small particles. Some chemical constituents and surface-adsorbed chemical species may damage peptide bonds in viral proteins and impair virus stability. Electrostatic charges and water content of atmospheric particulates may affect the adherence of virion particles and possibly their viability. In addition, vortex zones and human thermal plumes are major environmental factors altering the aerodynamics of buoyant particles in air, which can strongly influence the transport of airborne particles and the transmission of associated viruses. Insights into these factors may provide explanations for the widely observed positive correlations between COVID-19 infection and mortality with air pollution, of which particulate matter is a common constituent that may have a central role in the airborne transmission of the novel coronavirus. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s10311-022-01557-z.
Collapse
Affiliation(s)
- Zhaolin Gu
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Jie Han
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Liyuan Zhang
- School of Water and Environment, Chang’an University, Xi’an, 710064 People’s Republic of China
| | - Hongliang Wang
- Health Science Center, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Xilian Luo
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Xiangzhao Meng
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Yue Zhang
- School of Architecture, Chang’an University, Xi’an, 710064 People’s Republic of China
| | - Xinyi Niu
- School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Yang Lan
- School of Public Health, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Shaowei Wu
- School of Public Health, Xi’an Jiaotong University, Xi’an, 710049 People’s Republic of China
| | - Junji Cao
- Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029 People’s Republic of China
| | - Eric Lichtfouse
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi’an Jiaotong University, Xi’an, 710049 Shaanxi People’s Republic of China
- CNRS, IRD, INRAE, CEREGE, Aix-Marseille University, 13100, Aix-en-Provence, France
| |
Collapse
|
10
|
Direct Inhibition of SARS-CoV-2 Spike Protein by Peracetic Acid. Int J Mol Sci 2022; 24:ijms24010020. [PMID: 36613459 PMCID: PMC9820423 DOI: 10.3390/ijms24010020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/16/2022] [Accepted: 12/16/2022] [Indexed: 12/24/2022] Open
Abstract
Peracetic acid (PAA) disinfectants are effective against a wide range of pathogenic microorganisms, including bacteria, fungi, and viruses. Several studies have shown the efficacy of PAA against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2); however, its efficacy in SARS-CoV-2 variants and the molecular mechanism of action of PAA against SARS-CoV-2 have not been investigated. SARS-CoV-2 infection depends on the recognition and binding of the cell receptor angiotensin-converting enzyme 2 (ACE2) via the receptor-binding domain (RBD) of the spike protein. Here, we demonstrated that PAA effectively suppressed pseudotyped virus infection in the Wuhan type and variants, including Delta and Omicron. Similarly, PAA reduced the authentic viral load of SARS-CoV-2. Computational analysis suggested that the hydroxyl radicals produced by PAA cleave the disulfide bridges in the RBD. Additionally, the PAA treatment decreased the abundance of the Wuhan- and variant-type spike proteins. Enzyme-linked immunosorbent assay showed direct inhibition of RBD-ACE2 interactions by PAA. In conclusion, the PAA treatment suppressed SARS-CoV-2 infection, which was dependent on the inhibition of the interaction between the spike RBD and ACE2 by inducing spike protein destabilization. Our findings provide evidence of a potent disinfection strategy against SARS-CoV-2.
Collapse
|
11
|
Desai SR, Tang L, Hwang NC. Infection Control for Perioperative Ultrasonography and Echocardiography. J Cardiothorac Vasc Anesth 2022; 36:4440-4448. [PMID: 36123263 DOI: 10.1053/j.jvca.2022.08.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/04/2022] [Accepted: 08/12/2022] [Indexed: 11/11/2022]
Abstract
Ultrasound technology has revolutionized point-of-care diagnostics, decision-making, and the guidance of interventional procedures in Anesthesiology and Perioperative Medicine. Recent literature has highlighted important infection control considerations when performing transesophageal or transthoracic echocardiography, point-of-care ultrasound, and ultrasound-guided procedures. This narrative review focuses on operator precautions and disinfection methods and summarizes key recommendations from the international Echocardiography and Radiology Societies.
Collapse
Affiliation(s)
- Suneel Ramesh Desai
- Department of Anaesthesiology, Singapore General Hospital, Singapore; Department of Cardiothoracic Anaesthesia, National Heart Centre, Singapore; Department of Surgical Intensive Care, Singapore General Hospital, Singapore
| | - Leonard Tang
- Department of Anaesthesiology, Singapore General Hospital, Singapore
| | - Nian Chih Hwang
- Department of Anaesthesiology, Singapore General Hospital, Singapore; Department of Cardiothoracic Anaesthesia, National Heart Centre, Singapore.
| |
Collapse
|
12
|
Cavallo FM, Kommers R, Friedrich AW, Glasner C, van Dijl JM. Exploration of oxygen-mediated disinfection of medical devices reveals a high sensitivity of Pseudomonas aeruginosa to elevated oxygen levels. Sci Rep 2022; 12:18243. [PMID: 36309557 PMCID: PMC9617943 DOI: 10.1038/s41598-022-23082-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2022] [Accepted: 10/25/2022] [Indexed: 12/31/2022] Open
Abstract
The microbiological safety of medical devices is of paramount importance for patients and manufacturers alike. However, during usage medical devices will inevitably become contaminated with microorganisms, including opportunistic pathogens. This is a particular problem if these devices come in contact with body sites that carry high bacterial loads, such as the oral cavity. In the present study, we investigated whether high oxygen concentrations can be applied to disinfect surfaces contaminated with different Gram-positive and Gram-negative bacteria. We show that some opportunistic pathogens, exemplified by Pseudomonas aeruginosa, are particularly sensitive to oxygen concentrations above the atmospheric oxygen concentration of 21%. Our observations also show that high oxygen concentrations can be applied to reduce the load of P. aeruginosa on nebulizers that are used by cystic fibrosis patients, who are particularly susceptible to colonization and infection by this bacterium. We conclude that the efficacy of oxygen-mediated disinfection depends on the bacterial species, duration of oxygen exposure and the oxygen concentration. We consider these observations relevant, because gas mixtures with high oxygen content can be readily applied for microbial decontamination. However, the main challenge for oxygen-based disinfection approaches resides in a potentially incomplete elimination of microbial contaminants, which makes combined usage with other disinfectants like ethanol or hydrogen peroxide recommendable.
Collapse
Affiliation(s)
- Francis M Cavallo
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, HPC EB80, Hanzeplein 1, 9713, GZ, Groningen, The Netherlands
| | - Richard Kommers
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, HPC EB80, Hanzeplein 1, 9713, GZ, Groningen, The Netherlands
| | - Alexander W Friedrich
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, HPC EB80, Hanzeplein 1, 9713, GZ, Groningen, The Netherlands
| | - Corinna Glasner
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, HPC EB80, Hanzeplein 1, 9713, GZ, Groningen, The Netherlands
| | - Jan Maarten van Dijl
- Department of Medical Microbiology and Infection Prevention, University of Groningen, University Medical Center Groningen, HPC EB80, Hanzeplein 1, 9713, GZ, Groningen, The Netherlands.
- Department of Medical Microbiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, P.O. Box 30001, 9700, RB, Groningen, the Netherlands.
| |
Collapse
|
13
|
Tsang MY, Fałat P, Antoniak MA, Ziniuk R, Zelewski SJ, Samoć M, Nyk M, Qu J, Ohulchanskyy TY, Wawrzyńczyk D. Pr 3+ doped NaYF 4 and LiYF 4 nanocrystals combining visible-to-UVC upconversion and NIR-to-NIR-II downconversion luminescence emissions for biomedical applications. NANOSCALE 2022; 14:14770-14778. [PMID: 36178268 DOI: 10.1039/d2nr01680j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Lanthanide-doped fluoride nanocrystals (NCs) are known to exhibit unique optical properties, such as upconversion and downconversion luminescence (UCL and DCL), which can be employed for various applications. In this work, we demonstrate that by doping praseodymium(III) and ytterbium(III) ions (Pr3+ and Yb3+) into a nanosized fluoride matrix (i.e. NaYF4 and LiYF4), it is possible to combine their UCL and DCL properties that can be concurrently used for biomedical applications. In particular, the emissive modes combined in a single nanoparticle co-doped with Pr3+ and Yb3+ include DCL emission (excited at 980 nm and peaked at 1320 nm), which can be used for near infrared (NIR) DCL bioimaging in the NIR-II window of biological tissue transparency (∼1000-1350 nm) and UCL emission (excited at 447 nm and peaked at 275 nm) that can be employed for germicide action (via irradiation by light in the UVC range). A possibility of the latter was demonstrated by the denaturation of double-stranded DNA (dsDNA) into single-stranded ones that was caused by the UVC UCL emission from the NCs under 447 nm irradiation; it was evidenced by the hyperchromicity observed in the irradiated dsDNA solution and also by a fluorometric analysis of DNA unwinding (FADU) assay. Concurrently, the possibility of NIR-II luminescence bioimaging through biological tissues (bovine tooth and chicken flesh) was demonstrated. The proposed concept paves a way for NIR-II imaging guided antimicrobial phototherapy using lanthanide-doped fluoride nanocrystals.
Collapse
Affiliation(s)
- Min Ying Tsang
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Patryk Fałat
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Magda A Antoniak
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Roman Ziniuk
- College of Physics and Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan District, 518060, Guangdong, China.
| | - Szymon J Zelewski
- Department of Semiconductor Materials Engineering, Faculty of Fundamental Problems of Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland
| | - Marek Samoć
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Marcin Nyk
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| | - Junle Qu
- College of Physics and Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan District, 518060, Guangdong, China.
| | - Tymish Y Ohulchanskyy
- College of Physics and Optoelectronic Engineering, Shenzhen University, Nanhai Avenue 3688, Nanshan District, 518060, Guangdong, China.
| | - Dominika Wawrzyńczyk
- Institute of Advanced Materials, Faculty of Chemistry, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland.
| |
Collapse
|
14
|
Decamethoxin virucidal activity: in vitro and in silico studies. UKRAINIAN BIOCHEMICAL JOURNAL 2022. [DOI: 10.15407/ubj94.03.081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The data on the representative of decamethoxin short-term action on infectious bronchitis virus (IBV) strain H120 used as a human-safe model of SARS-CoV-2 virus are presented. The viral activity was estimated with the use of inverted microscope PrimoVert (Germany) by destructive effect on BHK21 fibroblastic cell line. In vitro results demonstrated that decamethoxin (100 μg/ml) completely inactivated IBV coronavirus strain at exposure of 30 sec and more. At the lowest decamethoxin exposure of 10 sec the antiseptic virucidal activity was 33% and 36% of control at 24 and 48 h of cultivation respectively. Molecular docking analysis indicated the significant similarity of IBV and SARS-CoV-2 main protease (Mpro) structure. Docking studies of decamethoxin interaction with IBV Mpro and SARS-CoV-2 Mpro active centers demonstrated the ligand-protein complexes formation with the estimated binding energy of -8.6, -8.4 kcal/mol and key amino acid residues ASN26, GLY141, GLU187, GLU164, THR24, THR25, ASN142, GLY143, CYS145, HIS164 and GLU166. Keywords: decamethoxin, IBV strain H120, main protease, molecular docking, QAC, SARS-COV-2, virucidal activity
Collapse
|
15
|
Kaur S, Tambat R, Pathania V, Nandanwar H, Soni S. Photo-thermally enhanced antimicrobial efficacy of silver nanoplates against Gram-negative, Gram-positive bacterial and fungal pathogens. J Appl Microbiol 2022; 133:569-578. [PMID: 35451155 DOI: 10.1111/jam.15588] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 04/08/2022] [Accepted: 04/19/2022] [Indexed: 11/29/2022]
Abstract
AIM This paper aims to investigate the photo-thermally enhanced antimicrobial efficacy of triangular silver nanoplates for a broad range of harmful pathogens viz., Gram-negative bacteria (Escherichia coli), Gram-positive bacteria (Staphylococcus aureus), and fungus (Candida albicans). METHODS AND RESULTS Triangular silver nanoplates were synthesized using the chemical method and were characterized for optical absorption, size and morphology, surface charge and concentration via UV-Vis spectroscopy, transmission electron microscopy, zeta potential analysis and inductively coupled plasma mass spectrometry, respectively. Furthermore, the photo-thermally enhanced antimicrobial efficacy of the triangular silver nanoplates (10 μg/ml concentration) was evaluated on broadband near-infrared irradiation. The photothermal response shows that for the fixed concentration of silver nanoplates, the smaller-sized nanoplates (~52 nm) lead to higher temperature rise than larger-sized nanoplates (~68 nm). It is demonstrated that within a short exposure duration of 15 min, the photothermal activation of silver nanoplates led to ~5 log10 CFU/ml reduction for E. coli and C. albicans, and ~7 log10 CFU/ml reduction for S. aureus from a considerably high initial load of 5 × 108 CFU/ml. CONCLUSIONS The present study demonstrates that photo-thermally enhanced triangular silver nanoplates possess much stronger antimicrobial efficacy over a short exposure duration of few minutes and exhibits the applicability for a broad range of pathogens. SIGNIFICANCE AND IMPACT OF STUDY The study is highly significant and explains the eradication of broad-spectrum of microbial pathogens by photo-thermally enhanced silver nanoplates in short exposure duration with low nanoparticle concentration, which is useful for diverse antibacterial and antifungal applications.
Collapse
Affiliation(s)
- Sarabjot Kaur
- CSIR-Central Scientific Instruments Organisation, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | | | - Vikas Pathania
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Hemraj Nandanwar
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
- CSIR-Institute of Microbial Technology, Chandigarh, India
| | - Sanjeev Soni
- CSIR-Central Scientific Instruments Organisation, Chandigarh, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| |
Collapse
|
16
|
Park C, Lee D, Kim I, Park S, Lee G, Tak S. Changes in the pattern and disease burden of acute viral respiratory infections before and during the COVID-19 pandemic. Osong Public Health Res Perspect 2022; 13:203-211. [PMID: 35820669 PMCID: PMC9263336 DOI: 10.24171/j.phrp.2022.0144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 06/15/2022] [Indexed: 11/28/2022] Open
Abstract
Objectives We conducted a comparative analysis of the differences in the incidence of 8 acute respiratory viruses and the changes in their patterns before and during the coronavirus disease 2019 (COVID-19) pandemic. Methods Three sentinel surveillance systems of the Korea Disease Control and Prevention Agency and data from the Health Insurance Review and Assessment Service were analyzed. The average numbers of reported cases and the related hospital admissions and outpatient data were compared between April 2018–2019 and 2020–2021. Changes in the disease burden and medical expenditures between these 2 time periods were evaluated. Results During the COVID-19 pandemic, the number of reported cases of all acute respiratory viral infections, except for human bocavirus, decreased significantly. Data from the Health Insurance Review and Assessment Service also showed decreases in the actual amount of medical service usage and a marked reduction in medical expenditures. Conclusion Non-pharmacological interventions in response to COVID-19 showed preventive effects on the transmission of other respiratory viruses, as well as COVID-19. Although COVID-19 had a tremendous impact on society as a whole, with high social costs, there were also positive effects, such as a reduction in the incidence of acute respiratory viral infections.
Collapse
|
17
|
Yoon J, Kim J, Park S, Jeong YW, Lee C, Oh SG. Fabrication of Ag-doped ZnO/PAN composite nanofibers by electrospinning: Photocatalytic and antiviral activities. KOREAN J CHEM ENG 2022; 39:1632-1640. [PMID: 35125591 PMCID: PMC8809213 DOI: 10.1007/s11814-021-1037-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 11/19/2021] [Accepted: 12/02/2021] [Indexed: 01/11/2023]
Abstract
Ag-doped ZnO nanoparticles (AZNs) were directly synthesized using sol-gel method to embed into polyacrylonitrile (PAN) nanofibers by electrospinning. The synthesized AZNs were optically and structurally characterized by UV-VIS spectroscopy, photoluminescence spectroscopy, high resolution HR-TEM and XRD. The photocatalytic activity of the AZNs was examined by photocatalytic degradation of methylene blue to correlate with their antiviral efficacy in PAN nanofibers fabricated via electrospinning technique. The PAN nanofibers containing AZNs were characterized using SEM and EDS. Finally, antiviral activity of AZNs/PAN nanofibers was investigated by using virus ϕx174 under visible light irradiation. As a result, the antiviral efficacy of nanofibers increased as the concentration of Ag in AZNs increased. The results show that better antiviral efficacy was obtained in AZNs/PAN nanofibers prepared with AZNs of higher photocatalytic performance.
Collapse
Affiliation(s)
- Jinsoo Yoon
- Department of Chemical Engineering, Hanyang University, Seoul, 04763 Korea
| | - Joohyun Kim
- School of Chemical Engineering, Institute of Chemical Process (ICP), Institute of Engineering Research, Seoul National University, Seoul, 08826 Korea
| | - Soomin Park
- Sensor Lab, Smart Device Team, Samsung Research, Samsung Electronics Co., Ltd., Seoul, 06756 Korea
| | - Yong Won Jeong
- Sensor Lab, Smart Device Team, Samsung Research, Samsung Electronics Co., Ltd., Seoul, 06756 Korea
| | - Changha Lee
- School of Chemical Engineering, Institute of Chemical Process (ICP), Institute of Engineering Research, Seoul National University, Seoul, 08826 Korea
| | - Seong-Geun Oh
- Department of Chemical Engineering, Hanyang University, Seoul, 04763 Korea
| |
Collapse
|
18
|
Kirisawa R, Kato R, Furusaki K, Onodera T. Universal Virucidal Activity of Calcium Bicarbonate Mesoscopic Crystals That Provides an Effective and Biosafe Disinfectant. Microorganisms 2022; 10:microorganisms10020262. [PMID: 35208717 PMCID: PMC8877192 DOI: 10.3390/microorganisms10020262] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/21/2022] [Accepted: 01/21/2022] [Indexed: 02/01/2023] Open
Abstract
We investigated the virucidal effects in solution of a new type of disinfectant, calcium bicarbonate mesoscopic crystals, designated CAC-717, against various types of virus. CAC-717 in solution is alkaline (pH 12.4) and has a self-electromotive force that generates pulsed electrical fields. Upon application to human skin, the pH of the solution becomes 8.4. CAC-717 contains no harmful chemicals and is thus non-irritating and harmless to humans and animals. Its virucidal effects were tested against six types of animal virus: enveloped double-strand (ds)-DNA viruses, non-enveloped ds-DNA viruses, non-enveloped single strand (ss)-DNA viruses, enveloped ss-RNA viruses, non-enveloped ss-RNA viruses, and non-enveloped ds-RNA viruses. The treatment resulted in a reduction in viral titer of at least 3.00 log10 to 6.38 log10. Fetal bovine serum was added as a representative organic substance. When its concentration was ≥20%, the virucidal effect of CAC-717 was reduced. Real-time PCR revealed that CAC-717 did not reduce the quantity of genomic DNA of most of the DNA viruses, but it greatly reduced that of the genomic RNA of most of the RNA viruses. CAC-717 may therefore be a useful biosafe disinfectant for use against a broad range of viruses.
Collapse
Affiliation(s)
- Rikio Kirisawa
- Department of Pathobiology, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan;
- Correspondence: ; Tel.: +81-11-388-4748
| | - Rika Kato
- Department of Pathobiology, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu 069-8501, Japan;
| | - Koichi Furusaki
- Mineral Activation Technical Research Center, Ohmuta 836-0041, Japan;
| | - Takashi Onodera
- Research Center for Food Safety, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo 113-8657, Japan;
| |
Collapse
|
19
|
Pacheappan GD, Samsudin NIP, Hasan H. The effects of different disinfectants and application conditions on microbial contaminants at dairy processing line. J FOOD PROCESS PRES 2022. [DOI: 10.1111/jfpp.16172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ganga Dewi Pacheappan
- Department of Food Science Faculty of Food Science and Technology Universiti Putra Malaysia Serdang Malaysia
| | - Nik Iskandar Putra Samsudin
- Department of Food Science Faculty of Food Science and Technology Universiti Putra Malaysia Serdang Malaysia
- Laboratory of Food Safety and Food Integrity Institute of Tropical Agriculture and Food Security Universiti Putra Malaysia Serdang Malaysia
| | - Hanan Hasan
- Department of Food Science Faculty of Food Science and Technology Universiti Putra Malaysia Serdang Malaysia
- Laboratory of Halal Science Research Halal Products Research Institute Universiti Putra Malaysia Serdang Malaysia
| |
Collapse
|
20
|
Nakano H, Hamaguchi T, Ikeda T, Watanabe‐Nakayama T, Ono K, Yamada M. Inactivation of seeding activity of amyloid β‐protein aggregates in vitro. J Neurochem 2021; 160:499-516. [DOI: 10.1111/jnc.15563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 11/25/2021] [Accepted: 12/14/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroto Nakano
- Department of Neurology and Neurobiology of Aging Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Tsuyoshi Hamaguchi
- Department of Neurology and Neurobiology of Aging Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
| | - Tokuhei Ikeda
- Department of Neurology and Neurobiology of Aging Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
- Department of Neurology Ishikawa Prefectural Central Hospital Kanazawa Japan
| | - Takahiro Watanabe‐Nakayama
- World Premier International Research Center Initiative (WPI)‐Nano Life Science Institute Kanazawa University Kanazawa Japan
| | - Kenjiro Ono
- Division of Neurology Department of Internal Medicine Showa University Tokyo Japan
| | - Masahito Yamada
- Department of Neurology and Neurobiology of Aging Kanazawa University Graduate School of Medical Sciences Kanazawa Japan
- Department of Internal Medicine Department of Neurology Kudanzaka Hospital Tokyo Japan
| |
Collapse
|
21
|
Sobhanipoor MH, Ahmadrajabi R, Nave HH, Saffari F. Reduced Susceptibility to Biocides among Enterococci from Clinical and Non-Clinical Sources. Infect Chemother 2021; 53:696-704. [PMID: 34951531 PMCID: PMC8731243 DOI: 10.3947/ic.2021.0090] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 10/24/2021] [Indexed: 12/03/2022] Open
Abstract
BACKGROUND Wide use of biocidal agents such as benzalkonium chloride (BCC) and chlorhexidine digluconate (CHX) in hospitals and non-hospital environments, has raised concerns over the emergence of non-susceptible strains. Efflux pumps are of known main mechanisms in biocide tolerance which have been rarely addressed in enterococci - members of gut microbiota which can cause serious problems particularly in hospitalized patients. The purpose of this study was to investigate the susceptibility of enterococci from different sources (clinical and fecal isolates) toward BCC and CHX, and its correlation with efflux associated genes. Also, possible link between biocide tolerance and antibiotic resistance was examined. MATERIALS AND METHODS One hundred and four enterococcus isolates including clinical (n = 54) and fecal isolates (n = 50) were studied for susceptibility toward BCC, CHX, ciprofloxacin, gentamicin and vancomycin. Twelve efflux associated genes were investigated by polymerase chain reaction assay. RESULTS In clinical isolates, reduced susceptibility to CHX and resistance to gentamicin and ciprofloxacin were significantly higher than fecal isolates. Vancomycin resistance was associated with increasing minimum inhibitory concentration of CHX. Among all investigated genes, only three ones, efrA, efrB and emeA were detected which were significantly associated with reduced susceptibility to CHX and were more frequent among clinical isolates. Also, high level resistance to gentamicin was significantly associated with the presence of efrA/B as well as with reduced susceptibility to CHX. CONCLUSION As expected, reduced susceptibility to CHX, was significantly higher in clinical isolates. However, the presence of a vancomycin-resistant enterococci among fecal isolates of healthy people which showed resistance/tolerance to studied antimicrobial agents, was unexpected and highlights the need to investigate other non-hospital environments to avoid dissemination of antimicrobial resistance. Correlation between reduced susceptibility to CHX and high level resistance to gentamicin, substantiates monitoring of biocide tolerance particularly in the healthcare settings to control the establishment of antimicrobial resistant strains.
Collapse
Affiliation(s)
- Mohammad Hossein Sobhanipoor
- Department of Medical Microbiology, Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Roya Ahmadrajabi
- Department of Medical Microbiology, Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Hossein Hosseini Nave
- Department of Medical Microbiology, Afzalipour Faculty of Medicine, Kerman University of Medical Sciences, Kerman, Iran
| | - Fereshteh Saffari
- Medical Mycology and Bacteriology Research Center, Kerman University of Medical Sciences, Kerman, Iran.
| |
Collapse
|
22
|
Nishshanka GKSH, Liyanaarachchi VC, Premaratne M, Nimarshana PHV, Ariyadasa TU, Kornaros M. Wastewater-based microalgal biorefineries for the production of astaxanthin and co-products: Current status, challenges and future perspectives. BIORESOURCE TECHNOLOGY 2021; 342:126018. [PMID: 34571169 DOI: 10.1016/j.biortech.2021.126018] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 09/19/2021] [Accepted: 09/20/2021] [Indexed: 06/13/2023]
Abstract
The freshwater microalgae Haematococcus pluvialis and Chlorella zofingiensis are attractive biorefinery feedstocks in view of their ability to simultaneously synthesize astaxanthin and other valuable metabolites. Nonetheless, there are concerns regarding the sustainability of such biorefineries due to the high freshwater footprint of microalgae cultivation. The integration of wastewater as an alternative growth media is a promising approach to reduce freshwater demand. Wastewater-based cultivation enables the recovery of essential nutrients required for microalgae growth and consequently results in phycoremediation of wastewater, thus promoting the concept of a circular economy and further enhancing the sustainability of the process. In this review, recent developments in wastewater-integrated cultivation of H. pluvialis and C. zofingiensis for astaxanthin production are discussed. Furthermore, prospective strategies for overcoming the inherent challenges of wastewater-based cultivation are reviewed. Moreover, the biorefinery potential of wastewater-grown H. pluvialis and C. zofingiensis is delineated and future perspectives of wastewater-based biorefineries are outlined.
Collapse
Affiliation(s)
| | - Vinoj Chamilka Liyanaarachchi
- Department of Chemical and Process Engineering, Faculty of Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka
| | - Malith Premaratne
- Department of Chemical and Process Engineering, Faculty of Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka
| | - P H V Nimarshana
- Department of Mechanical Engineering, Faculty of Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka
| | - Thilini U Ariyadasa
- Department of Chemical and Process Engineering, Faculty of Engineering, University of Moratuwa, Moratuwa 10400, Sri Lanka.
| | - Michael Kornaros
- Lab. of Biochemical Engineering & Environmental Technology (LBEET), Department of Chemical Engineering, University of Patras, 26504 Patras, Greece
| |
Collapse
|
23
|
Yamaguchi M, Ma T, Tadaki D, Hirano-Iwata A, Watanabe Y, Kanetaka H, Fujimori H, Takemoto E, Niwano M. Bactericidal Activity of Bulk Nanobubbles through Active Oxygen Species Generation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:9883-9891. [PMID: 34339599 DOI: 10.1021/acs.langmuir.1c01578] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
We investigated the bactericidal activity of bulk nanobubbles (NBs) using E. coli, a model bacterium. Bulk NBs were produced by forcing gas through a porous alumina membrane with an ordered arrangement of nanoscale straight holes in contact with water. NBs with different gas contents, including CO2, O2, and N2, were generated and evaluated for their bactericidal effects. The survival rate of E. coli was significantly reduced in a suspension of CO2-containing NB (CO2-NB water). The N2-NB water demonstrated a small amount of bactericidal behavior, but its impact was not as significant as that of CO2-NB water. When E. coli was retained in O2-NB water, the survival rate was even higher than that in pure water (PW). We investigated the generation of reactive oxygen species (ROS) in NB suspensions by electron spin resonance spectroscopy. The main ROS generated in the NB water were hydroxyl radicals and OH·, and the production of ROS was the strongest in CO2-NB water, which was consistent with the results of the bactericidal effect measurements. We assumed that NB mediated by ROS would exhibit bactericidal behavior and proposed a kinetic model to explain the retention time variation of the survival rate. The results calculated based on the proposed model matched closely with the experimental results.
Collapse
Affiliation(s)
| | - Teng Ma
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
| | - Daisuke Tadaki
- Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
| | - Ayumi Hirano-Iwata
- Advanced Institute for Materials Research (WPI-AIMR), Tohoku University, Sendai 980-8577, Japan
- Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
| | | | - Hiroyasu Kanetaka
- Graduate School of Dentistry, Tohoku University, Sendai 980-8575, Japan
| | - Hiroshi Fujimori
- Planning & Development Department, Takemoto Yohki Co., Ltd., Tokyo 111-0036, Japan
| | - Emiko Takemoto
- Planning & Development Department, Takemoto Yohki Co., Ltd., Tokyo 111-0036, Japan
| | - Michio Niwano
- Tohoku Fukushi University, Sendai 989-3201, Japan
- Research Institute of Electrical Communication, Tohoku University, Sendai 980-8577, Japan
| |
Collapse
|
24
|
van den Berg RB, de Poot S, Swart EL, Crul M. Assessment of occupational exposure to nebulized isopropyl alcohol as disinfectant during aseptic compounding of parenteral cytotoxic drugs in cleanrooms. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2021; 18:361-368. [PMID: 34185621 DOI: 10.1080/15459624.2021.1933505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Pharmacy technicians are exposed to volatile organic compounds, like the disinfectant isopropyl alcohol (IPA), during the process of aseptic compounding of parenteral cytotoxic drugs. The occupational exposure to nebulized IPA during aseptic compounding has not been investigated. The aim of this study was to investigate the exposure to IPA during aseptic compounding of parenteral cytotoxic drugs and to assess compliance with legal and regulatory limits. As a secondary endpoint, the difference between two disinfection methods was compared regarding the exposure to IPA. The exposure to IPA was measured during five working shifts of 8 hr and one shift of 4 hr. The concentration IPA was measured by using a six-gas monitor. Total daily exposure was calculated as 8-hr Time Weighted Average (TWA) air concentration in mg/m3 and compared with an Occupational Exposure Limit (OEL) value of 500 mg/m3 and incidental peak exposure of 5,000 mg/m3. To assess whether the 8-hr TWA air concentration meets the legal and regulatory limits the Similar Exposure Groups (SEG) compliance test was used. A paired sample t-test was conducted to assess difference in exposure between two disinfection methods. The average 8-hr TWA exposure to IPA during the six measurements varied from 2.6 mg/m3 to 43.9 mg/m3 and the highest momentary concentration measured was 860 mg/m3. The result of the SEG compliance test was 3.392 (Ur value) and was greater than the Ut value of 2.187 which means the exposure to IPA is in compliance with the OEL value. No significant difference in exposure was shown between two disinfection methods (p = 0.49). In conclusion, exposure to IPA during aseptic compounding of parenteral cytotoxic drugs showed compliance to the OEL values with no significant difference in exposure between two disinfection methods.
Collapse
Affiliation(s)
- Roland B van den Berg
- Department of Clinical Pharmacology and Pharmacy, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Stan de Poot
- Department of Occupational Health & Safety, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Eleonora L Swart
- Department of Clinical Pharmacology and Pharmacy, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| | - Mirjam Crul
- Department of Clinical Pharmacology and Pharmacy, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands
| |
Collapse
|
25
|
Ram K, Thakur RC, Singh DK, Kawamura K, Shimouchi A, Sekine Y, Nishimura H, Singh SK, Pavuluri CM, Singh RS, Tripathi SN. Why airborne transmission hasn't been conclusive in case of COVID-19? An atmospheric science perspective. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 773:145525. [PMID: 33940729 PMCID: PMC7984961 DOI: 10.1016/j.scitotenv.2021.145525] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 01/15/2021] [Accepted: 01/26/2021] [Indexed: 05/06/2023]
Abstract
Airborne transmission is one of the routes for the spread of COVID-19 which is caused by inhalation of smaller droplets1 containing SARS-CoV-2 (i.e., either virus-laden particulate matter: PM and/or droplet nuclei) in an indoor environment. Notably, a significant fraction of the small droplets, along with respiratory droplets, is produced by both symptomatic and asymptomatic individuals during expiratory events such as breathing, sneezing, coughing and speaking. When these small droplets are exposed to the ambient environment, they may interact with PM and may remain suspended in the atmosphere even for several hours. Therefore, it is important to know the fate of these droplets and processes (e.g., physical and chemical) in the atmosphere to better understand airborne transmission. Therefore, we reviewed existing literature focussed on the transmission of SARS-CoV-2 in the spread of COVID-19 and present an environmental perspective on why airborne transmission hasn't been very conclusive so far. In addition, we discuss various environmental factors (e.g., temperature, humidity, etc.) and sampling difficulties, which affect the conclusions of the studies focussed on airborne transmission. One of the reasons for reduced emphasis on airborne transmission could be that the smaller droplets have less number of viruses as compared to larger droplets. Further, smaller droplets can evaporate faster, exposing SARS-CoV-2 within the small droplets to the environment, whose viability may further reduce. For example, these small droplets containing SARS-CoV-2 might also physically combine with or attach to pre-existing PM so that their behaviour and fate may be governed by PM composition. Thus, the measurement of their infectivity and viability is highly uncertain due to a lack of robust sampling system to separately collect virions in the atmosphere. We believe that the present review will help to minimize the gap in our understanding of the current pandemic and develop a robust epidemiological method for mortality assessment.
Collapse
Affiliation(s)
- Kirpa Ram
- Institute of Environment and Sustainable Development, Banaras Hindu University, Varanasi 221005, India.
| | - Roseline C Thakur
- Institute for Atmospheric and Earth System Research (INAR)/Physics, Faculty of Science, University of Helsinki, 00014 Helsinki, Finland.
| | - Dharmendra Kumar Singh
- French National Centre for Scientific Research (CNRS)/IRCE Lyon, 2 avenue Albert Einstein, Villeurbanne 69100, France.
| | - Kimitaka Kawamura
- Chubu Institute for Advanced Studies, Chubu University, Kasugai 487-8501, Japan.
| | - Akito Shimouchi
- School of Life and Health Sciences, Chubu University, Kasugai 487-8501, Japan.
| | - Yoshika Sekine
- Department of Chemistry, Tokai University, Hiratsuka, Kanagawa 25901292, Japan.
| | - Hidekazu Nishimura
- Virus Research Center, Clinical Research Division, Sendai Medical Center, Sendai, Japan.
| | - Sunit K Singh
- Laboratory of Molecular Virology & Immunology, Molecular Biology Unit, Faculty of Medicine, Institute of Medical Sciences (IMS), Banaras Hindu University (BHU), Varanasi 221005, India.
| | - Chandra Mouli Pavuluri
- Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin 300072, China.
| | - R S Singh
- Department of Chemical Engineering, IIT (BHU), Varanasi 221005, Uttar Pradesh, India.
| | - S N Tripathi
- Department of Civil Engineering, Centre for Environmental Science and Engineering, Indian Institute of Technology Kanpur, Kanpur 208016, India.
| |
Collapse
|
26
|
Stawarz-Janeczek M, Kryczyk-Poprawa A, Muszyńska B, Opoka W, Pytko-Polończyk J. Disinfectants Used in Stomatology and SARS-CoV-2 Infection. Eur J Dent 2021; 15:388-400. [PMID: 33694135 PMCID: PMC8184310 DOI: 10.1055/s-0041-1724154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Effective disinfection is a basic procedure in medical facilities, including those conducting dental surgeries, where treatments for tissue discontinuity are also performed, as it is an important element of infection prevention. Disinfectants used in dentistry and dental and maxillofacial surgery include both inorganic (hydrogen peroxide, sodium chlorite-hypochlorite) and organic compounds (ethanol, isopropanol, peracetic acid, chlorhexidine, eugenol). Various mechanisms of action of disinfectants have been reported, which include destruction of the structure of bacterial and fungal cell membranes; damage of nucleic acids; denaturation of proteins, which in turn causes inhibition of enzyme activity; loss of cell membrane integrity; and decomposition of cell components. This article discusses the most important examples of substances used as disinfectants in dentistry and presents the mechanisms of their action with particular focus on severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The search was conducted in ScienceDirect, PubMed, and Scopus databases. The interest of scientists in the use of disinfectants in dental practice is constantly growing, which results in the increasing number of publications on disinfection, sterilization, and asepsis. Many disinfectants often possess several of the abovementioned mechanisms of action. In addition, disinfectant preparations used in dental practice either contain one compound or are frequently a mixture of active compounds, which increases their range and effectiveness of antimicrobial action. Currently available information on disinfectants that can be used to prevent SARS-CoV-2 infection in dental practices was summarized.
Collapse
Affiliation(s)
- Magdalena Stawarz-Janeczek
- Department of Integrated Dentistry, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| | - Agata Kryczyk-Poprawa
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Kraków, Poland
| | - Bożena Muszyńska
- Department of Pharmaceutical Botany, Faculty of Pharmacy, Jagiellonian University Medical College, Kraków, Poland
| | - Włodzimierz Opoka
- Department of Inorganic and Analytical Chemistry, Faculty of Pharmacy, Jagiellonian University Medical College, Kraków, Poland
| | - Jolanta Pytko-Polończyk
- Department of Integrated Dentistry, Faculty of Medicine, Jagiellonian University Medical College, Kraków, Poland
| |
Collapse
|
27
|
Raza S, Matuła K, Karoń S, Paczesny J. Resistance and Adaptation of Bacteria to Non-Antibiotic Antibacterial Agents: Physical Stressors, Nanoparticles, and Bacteriophages. Antibiotics (Basel) 2021; 10:435. [PMID: 33924618 PMCID: PMC8070485 DOI: 10.3390/antibiotics10040435] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/02/2021] [Accepted: 04/08/2021] [Indexed: 12/14/2022] Open
Abstract
Antimicrobial resistance is a significant threat to human health worldwide, forcing scientists to explore non-traditional antibacterial agents to support rapid interventions and combat the emergence and spread of drug resistant bacteria. Many new antibiotic-free approaches are being developed while the old ones are being revised, resulting in creating unique solutions that arise at the interface of physics, nanotechnology, and microbiology. Specifically, physical factors (e.g., pressure, temperature, UV light) are increasingly used for industrial sterilization. Nanoparticles (unmodified or in combination with toxic compounds) are also applied to circumvent in vivo drug resistance mechanisms in bacteria. Recently, bacteriophage-based treatments are also gaining momentum due to their high bactericidal activity and specificity. Although the number of novel approaches for tackling the antimicrobial resistance crisis is snowballing, it is still unclear if any proposed solutions would provide a long-term remedy. This review aims to provide a detailed overview of how bacteria acquire resistance against these non-antibiotic factors. We also discuss innate bacterial defense systems and how bacteriophages have evolved to tackle them.
Collapse
Affiliation(s)
| | | | | | - Jan Paczesny
- Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland; (S.R.); (K.M.); (S.K.)
| |
Collapse
|
28
|
CLEAR - Contact lens wettability, cleaning, disinfection and interactions with tears. Cont Lens Anterior Eye 2021; 44:157-191. [DOI: 10.1016/j.clae.2021.02.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 02/01/2021] [Indexed: 12/15/2022]
|
29
|
Isawumi A, Donkor JK, Mosi L. In vitro inhibitory effects of commercial antiseptics and disinfectants on foodborne and environmental bacterial strains. AAS Open Res 2021. [DOI: 10.12688/aasopenres.13154.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Antibacterial agents, including disinfectants and antiseptics are commonly used to reduce bacterial loads. As they have a broad-spectrum of activity against bacteria, function either as bactericidal or bacteriostatic agents. While bacterial antimicrobial resistance is increasing, disinfectants and antiseptics are still relevant antibacterial agents. Methods: This study investigated the in vitro inhibitory effects of commonly used antiseptics and disinfectants. Using standard disc diffusion methods, selected common household antibacterial agents were tested on resistant Staphylococcus aureus isolated from hospital environment and foodborne Escherichia coli and Bacillus species. Results: The study showed that the selected antibacterial agents were effective against the antibiotic resistant bacteria with appreciable zone of inhibition relative to the standard controls used. Conclusions: Though bacteria are consistently developing resistance to available antibiotics, disinfectants still inhibit bacterial growth and survival with considerable public health importance.
Collapse
|
30
|
Banerjee S, Raghunathan S, Banerjee S, Bandyopadhyay B. Portable sterilizer with microbe content detection device. BULLETIN OF THE NATIONAL RESEARCH CENTRE 2021; 45:35. [PMID: 33558798 PMCID: PMC7859904 DOI: 10.1186/s42269-021-00496-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Accepted: 01/22/2021] [Indexed: 06/12/2023]
Abstract
BACKGROUND Infectious diseases, such as the latest COVID pandemic, caused by microorganisms like bacteria and virus, wreak havoc shaking human civilization with its rapid infection rate, and high number of mortalities. In case of a contagious disease, the virus can survive on any surface over a period of time and can be transferred to the human host through touching those surfaces unknowingly. Cleaning those possible surfaces to which these microorganisms can cling onto is one of the major ways to curb the spread. The aim of this study was to design a sterilizer which can clean such surfaces of daily used items easily within a certain period of time and can assess the cleaning efficacy by estimating the presence of microbes before and after sanitization. METHOD DEVELOPMENT To achieve this goal, we propose a portable sterilization unit that contains a sterilization chamber fitted with a microbe content detector. The sterilization chamber will cleanse the surfaces off the microbes using ultraviolet radiation. The chamber can be portable and at the same time big enough to accommodate items of daily use, like watch, wallet, clothes, utensils to even foods for single-house application. The microbe content detector will detect the success of the sterilization procedure by examining the time-lapse laser speckle images captured by a high-speed camera by mean of image processing algorithm, such that the user can determine whether further sterilization is required. CONCLUSIONS Microbe content detection device associated with the conventional sterilization procedure will give an assessment of the effectiveness of the sterilization. Successful implementation of sterilization for a wide variety of items of everyday use aided with microbe content detection technique is first of its kind and should be an effective tool for use in large communities, offices and public places for effective sterilization to help fight against the spread of infectious diseases.
Collapse
Affiliation(s)
- Sreerup Banerjee
- Department of Mechanical Engineering, Haldia Institute of Technology, Haldia, West Bengal India
| | - Shriram Raghunathan
- School of Computer Science and Engineering, VIT Bhopal University, Kothri Kalan, Madhya Pradesh India
| | | | - Boudhayan Bandyopadhyay
- Department of Biotechnology, School of Life Science and Biotechnology, Adamas University, Kolkata, India
| |
Collapse
|
31
|
Bae SH, Chun YS, Kim KW. Changes in Mini-scleral Lens Parameters after Repetitive Ethylene Oxide Sterilization. JOURNAL OF THE KOREAN OPHTHALMOLOGICAL SOCIETY 2020. [DOI: 10.3341/jkos.2020.61.12.1433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
32
|
Sung SH, Han JE, Ryu JY, Sung ADM, Park JY, Ha IH, Kim KH, Park JK, Shin BC. Current status and future perspective of external herbal dispensaries preparing traditional herbal medicine in South Korea: the first National-Wide Survey results. BMC Complement Med Ther 2020; 20:354. [PMID: 33225907 PMCID: PMC7681953 DOI: 10.1186/s12906-020-03094-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Accepted: 09/23/2020] [Indexed: 11/24/2022] Open
Abstract
Background An external herbal dispensary (EHD) is a type of pharmacy that provides various types of personalized herbal medicines (PHMs) to other traditional Korean medicine (TKM) institutions. Such dispensaries were legalized by the Ministry of Health and Welfare (MoHW) in 2008 in South Korea. The purpose of this study is to understand the current status of the EHD facilities and their quality controls and compare them with the good manufacture practice (GMP) guidelines to contribute to the establishment of the safety and quality control criteria for PHMs. Methods We contacted 107 EHD representatives or people in charge of the preparation of PHMs (TKM pharmacists) and invited them to complete a survey questionnaire; of the total, 81 responded. The survey questionnaire was developed in 3 stages: drafting, revision by external experts, and final editing. It consisted of 20 questions covering 3 sections: basic characteristics of EHDs, facility, and quality control. The survey was hosted online from December 2017 to January 2018 as guided by the MoHW. Results The completion rate was 75.7% (n = 81). In terms of facilities, the five facilities (water supply, manufacture, pest control, hygiene management and warehousing) that corresponded to the legal requirements of EHD were mostly equipped, but the types of facilities and equipment differed. Two facilities (sterilization and cross-contamination that were not legally required for EHD were found to have mostly pharmacopuncture-EHD (P-EHD), but hardly any herbal medicine-EHD (H-EHD). In our findings regarding quality control of non-medicinal herbs, sensory evaluation that included checks for foreign bodies and deterioration were conducted. In terms of the quality control of herbal medicines, residual pesticides and heavy metals tests were performed and for pharmacopuncture, pH, salinity, sterility, and endotoxin tests along with gross examination were performed. In the end, we found that 6 of the 38 standard items as required by the Korea GMP were suitable. Conclusions In this study, detailed information for each existing EHD law was determined through a nationwide questionnaire. Moreover, the basis for its reflection in additional legal standards should be introduced so that safe herbal medicine can be prepared in EHDs.
Collapse
Affiliation(s)
- Soo-Hyun Sung
- Department of Policy Development, National Development Institute of Korean Medicine, Seoul, 04554, Republic of Korea
| | - Ji-Eun Han
- Department of Policy Development, National Development Institute of Korean Medicine, Seoul, 04554, Republic of Korea
| | - Ji-Yeon Ryu
- Department of Policy Development, National Development Institute of Korean Medicine, Seoul, 04554, Republic of Korea
| | - Angela Dong-Min Sung
- Department of Policy Development, National Development Institute of Korean Medicine, Seoul, 04554, Republic of Korea
| | - Jung-Youn Park
- Department of Health and Welfare, Yuhan University, 590 Gyeongin-ro, Bucheon-si, Gyeonggi-do, 14780, Republic of Korea
| | - In-Hyuk Ha
- Jaseng Hospital of Korean Medicine, 536 Gangnam-daero, Gangnam-gu, Seoul, 06110, Republic of Korea
| | - Kyeong Han Kim
- Department of Preventive Medicine, College of Korean Medicine, Woosuk University, Wanju, 55338, Republic of Korea
| | - Jang-Kyung Park
- Division of Clinical Medicine, School of Korean Medicine, Pusan National University, Yangsan, Kyungnam, 50612, Republic of Korea
| | - Byung-Cheul Shin
- Division of Clinical Medicine, School of Korean Medicine, Pusan National University, Yangsan, Kyungnam, 50612, Republic of Korea.
| |
Collapse
|
33
|
Isawumi A, Donkor JK, Mosi L. In vitro inhibitory effects of commercial antiseptics and disinfectants on foodborne and environmental bacterial strains. AAS Open Res 2020. [DOI: 10.12688/aasopenres.13154.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Antibacterial agents, including disinfectants and antiseptics are commonly used to reduce bacterial loads. As they have a broad-spectrum of activity against bacteria, function either as a bactericidal or bacteriostatic. While bacterial antimicrobial resistance is increasing, disinfectants and antiseptics are still relevant antibacterial agents. Methods: This study investigated the in vitro inhibitory effects of commonly used antiseptics and disinfectants. Using standard disc diffusion methods, selected common household antibacterial agents were tested on resistant Staphylococcus aureus isolated from hospital environment and foodborne Escherichia coli and Bacillus species. Results: The study showed that the selected antibacterial agents were effective against the antibiotic resistant bacteria with appreciable zone of inhibition relative to the standard controls used. Conclusions: Though bacteria are consistently developing resistance to available antibiotics, disinfectants still inhibit bacterial growth and survival with considerable public health importance.
Collapse
|
34
|
Versoza M, Heo J, Ko S, Kim M, Park D. Solid Oxygen-Purifying (SOP) Filters: A Self-Disinfecting Filters to Inactivate Aerosolized Viruses. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:E7858. [PMID: 33120940 PMCID: PMC7662992 DOI: 10.3390/ijerph17217858] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 10/14/2020] [Accepted: 10/20/2020] [Indexed: 12/16/2022]
Abstract
Normal heating, ventilation, and air conditioning (HVAC) systems typically use high-efficiency particulate air (HEPA) filters, which can filter dust, various pollutants, and even bacteria and viruses from indoor air. However, since HEPA filters cannot not clean themselves and due to the nature of these microbes which can survive for long periods of time, changing these filters improperly could transmit pathogenic bacteria or viruses, and could even lead to new infections. This study indicated that these manufactured Solid Oxygen-purifying (SOP) filters have the potential to self-disinfect, filter, and inactivate aerosolized viruses. MS2 bacteriophage was used as a model virus in two different experiments. The first experiment involved aerosolization of the virus, while the second were a higher viral load using a soaking method. The SOP filters inactivated up to 99.8% of the virus particles in both experiments, provided that the density of the SOP filter was high. Thus, SOP filters could self-clean, which led to protection against airborne and aerosolized viruses by inactivating them on contact. Furthermore, SOP filters could be potentially use or addition in HVAC systems and face masks to prevent the transmission of airborne and aerosolized viruses.
Collapse
Affiliation(s)
- Michael Versoza
- Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang City 16105, Korea; (M.V.); (J.H.); (S.K.); (M.K.)
- Railway System Engineering, University of Science and Technology, Daejeon City 34113, Korea
| | - Jaeseok Heo
- Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang City 16105, Korea; (M.V.); (J.H.); (S.K.); (M.K.)
- Railway System Engineering, University of Science and Technology, Daejeon City 34113, Korea
| | - Sangwon Ko
- Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang City 16105, Korea; (M.V.); (J.H.); (S.K.); (M.K.)
| | - Minjeong Kim
- Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang City 16105, Korea; (M.V.); (J.H.); (S.K.); (M.K.)
| | - Duckshin Park
- Transportation Environmental Research Team, Korea Railroad Research Institute, Uiwang City 16105, Korea; (M.V.); (J.H.); (S.K.); (M.K.)
- Railway System Engineering, University of Science and Technology, Daejeon City 34113, Korea
| |
Collapse
|
35
|
Lee S, Choi YS, Jo K, Kim TK, Yong HI, Jung S. Quality characteristics and protein digestibility of Protaetia brevitarsis larvae. JOURNAL OF ANIMAL SCIENCE AND TECHNOLOGY 2020; 62:741-752. [PMID: 33089238 PMCID: PMC7553843 DOI: 10.5187/jast.2020.62.5.741] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 11/24/2022]
Abstract
Herein, the in vitro protein digestibility of lyophilized
Protaetia brevitarsis larvae flour with and without
defatting using 70% ethanol was compared with beef loin. Proximate analysis
showed that the defatted larvae contained the highest protein content
(p < 0.05). The viable counts of total aerobic
bacteria, Escherichia coli, and coliform bacteria decreased
significantly after defatting the larval samples with 70% ethanol
(p < 0.05). Measurement of α-amino group
content and sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE)
revealed higher amounts of low molecular weight proteins in the larvae compared
to beef loin (p < 0.05). After in vitro digestion, the
degree of protein hydrolysis of the digesta was higher for both larvae samples
compared to beef loin (p < 0.05). No change was observed
in the in vitro larval protein digestibility after defatting.
These results highlight the excellent protein digestibility of P.
brevitarsis larvae with high protein content. Defatting insect
flour with 70% ethanol could enhance microbial safety while maintaining
excellent protein digestibility.
Collapse
Affiliation(s)
- Seonmin Lee
- Division of Animal and Dairy Science, Chungnam National University, Daejeon 34134, Korea
| | - Yun-Sang Choi
- Research Group of Food Processing, Korea Food Research Institute, Wanju 55365, Korea
| | - Kyung Jo
- Division of Animal and Dairy Science, Chungnam National University, Daejeon 34134, Korea
| | - Tae-Kyung Kim
- Research Group of Food Processing, Korea Food Research Institute, Wanju 55365, Korea
| | - Hae In Yong
- Research Group of Food Processing, Korea Food Research Institute, Wanju 55365, Korea
| | - Samooel Jung
- Division of Animal and Dairy Science, Chungnam National University, Daejeon 34134, Korea
| |
Collapse
|
36
|
Eliades T, Koletsi D. Minimizing the aerosol-generating procedures in orthodontics in the era of a pandemic: Current evidence on the reduction of hazardous effects for the treatment team and patients. Am J Orthod Dentofacial Orthop 2020; 158:330-342. [PMID: 32682661 PMCID: PMC7364170 DOI: 10.1016/j.ajodo.2020.06.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 06/01/2020] [Accepted: 06/01/2020] [Indexed: 02/06/2023]
Abstract
The purpose of this critical review is to list the sources of aerosol production during orthodontic standard procedure, analyze the constituent components of aerosol and their dependency on modes of grinding, the presence of water and type of bur, and suggest a method to minimize the quantity and detrimental characteristics of the particles comprising the solid matter of aerosol. Minimization of water-spray syringe utilization for rinsing is suggested on bonding related procedures, while temporal conditions as represented by seasonal epidemics should be considered for the decision of intervention scheme provided as a preprocedural mouth rinse, in an attempt to reduce the load of aerosolized pathogens. In normal conditions, chlorhexidine 0.2%, preferably under elevated temperature state should be prioritized for reducing bacterial counts. In the presence of oxidation vulnerable viruses within the community, substitute strategies might be represented by the use of povidone iodine 0.2%-1%, or hydrogen peroxide 1%. After debonding, extensive material grinding, as well as aligner related attachment clean-up, should involve the use of carbide tungsten burs under water cooling conditions for cutting efficiency enhancement, duration restriction of the procedure, as well as reduction of aerosolized nanoparticles. In this respect, selection strategies of malocclusions eligible for aligner treatment should be reconsidered and future perspectives may entail careful and more restricted utilization of attachment grips. For more limited clean-up procedures, such as grinding of minimal amounts of adhesive remnants, or individualized bracket debonding in the course of treatment, hand-instruments for remnant removal might well represent an effective strategy. Efforts to minimize the use of rotary instrumentation in orthodontic settings might also lead the way for future solutions. Measures of self-protection for the treatment team should never be neglected. Dressing gowns and facemasks with filter protection layers, appropriate ventilation and fresh air flow within the operating room comprise significant links to the overall picture of practice management. Risk management considerations should be constant, but also updated as new material applications come into play, while being grounded on the best available evidence.
Collapse
Affiliation(s)
- Theodore Eliades
- Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland.
| | - Despina Koletsi
- Clinic of Orthodontics and Pediatric Dentistry, Center of Dental Medicine, University of Zurich, Zurich, Switzerland
| |
Collapse
|
37
|
Pi K, Xie X, Ma T, Su C, Li J, Wang Y. Arsenic immobilization by in-situ iron coating for managed aquifer rehabilitation. WATER RESEARCH 2020; 181:115859. [PMID: 32438118 DOI: 10.1016/j.watres.2020.115859] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Revised: 04/17/2020] [Accepted: 04/21/2020] [Indexed: 06/11/2023]
Abstract
A long-lasting challenge in eliminating the worldwide impact of geogenic arsenic (As)-contaminated groundwater is the development of efficient, in-situ treatment technologies that are applicable in decentralized and rural areas. Here we present a managed aquifer rehabilitation (MAR) approach based on the in-situ creation of Fe-oxide scavengers for remediating As-contaminated groundwater. The Fe-oxide coatings on sediment surfaces were generated via periodic injection of Fe2+ and ClO- solutions into an As-affected sandy aquifer at the Datong Basin, northern China for 25 days. This treatment prompted the buildup of weakly alkaline/circumneutral and oxidizing conditions to enhance As(III) oxidation in the target aquifer. Dissolved As concentrations decreased from the initial average 78.0 to 9.8 μg/L over the 25-d amendment. Sediment imaging by scanning electron microscope-X-ray energy dispersive spectroscopy confirms the deposition of Fe-rich precipitates on sediment surfaces with the simultaneous retention of As, and high density electrical tomography suggests the occurrence of such a process throughout the target zone. Further X-ray diffraction analysis and sequential chemical extraction reveal that the neo-formed Fe minerals comprised both poorly crystalline (e.g., ferrihydrite) and better crystalline (e.g., goethite) Fe oxides. The process-based reactive-transport modeling for the variations of As species in the treated groundwater supports that the new Fe-oxide minerals, most probably goethite, acted as efficient removers of aqueous As. The low As level of ∼10 μg/L was maintained during the following 215-d monitoring, demonstrating the long effectiveness of the MAR approach. This study highlights the feasibility of As immobilization by manipulating in-situ Fe-oxide coating on sandy sediments at the pilot scale. The MAR technology may be applicable for As-affected aquifers with controlled oxidizing conditions in the Datong Basin and likely other high-As regions with similar hydrogeochemical settings.
Collapse
Affiliation(s)
- Kunfu Pi
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
| | - Xianjun Xie
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
| | - Teng Ma
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
| | - Chunli Su
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
| | - Junxia Li
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China
| | - Yanxin Wang
- School of Environmental Studies & State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, 430074 Wuhan, China.
| |
Collapse
|
38
|
Taran V, Garkusha I, Gnidenko Y, Krasnyj V, Lozina A, Taran A, Chechelnitskyi O, Starikov V, Starikova S. Portable ozone sterilization device with mechanical and ultrasonic cleaning units for dentistry. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2020; 91:084105. [PMID: 32872939 DOI: 10.1063/1.5145279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 08/06/2020] [Indexed: 06/11/2023]
Abstract
A portable device for cleaning and ozone sterilization of small-sized delicate dental instruments that cannot withstand the high heat and humidity of standard autoclaving has been developed. The device contains a remote unit for magnetic mechanical washing, an ultrasonic bath for pre-cleaning treatment, and a container for ozone sterilization with a reactor based on dielectric barrier discharge. The maximum ozone concentration in water reached 8.5 mg/l for 10 min of operation at a water temperature of 19 °C. The results of inactivation of Pseudomonas aeruginosa, Escherichia coli, and Staphylococcus aureus are presented. Distilled water with such seeded micro-organisms was bubbled with an ozone-air mixture at an ozone concentration of 5.8 mg/l at 17 °C for 5 min, 10 min, 20 min, and 30 min. The maximum bactericidal effect was manifested for Pseudomonas aeruginosa cells with their total elimination within 10 min. Inactivation of Escherichia coli bacteria was monitored after 20 min of treatment, and Staphylococcus aureus-after 30 min of treatment.
Collapse
Affiliation(s)
- Valerij Taran
- Institute of Plasma Physics of NSC KIPT, 61108 Kharkov, Ukraine
| | - Igor Garkusha
- Institute of Plasma Physics of NSC KIPT, 61108 Kharkov, Ukraine
| | - Yuriy Gnidenko
- V.N. Karazin Kharkiv National University, 61022 Kharkov, Ukraine
| | - Viktor Krasnyj
- Institute of Plasma Physics of NSC KIPT, 61108 Kharkov, Ukraine
| | - Alina Lozina
- Institute of Plasma Physics of NSC KIPT, 61108 Kharkov, Ukraine
| | - Anton Taran
- Institute of Plasma Physics of NSC KIPT, 61108 Kharkov, Ukraine
| | | | - Vadym Starikov
- National Technical University "Kharkov Polytechnic Institute", 61002 Kharkov, Ukraine
| | - Svetlana Starikova
- Kharkov Medical Academy of Post-Graduate Education, 61022 Kharkov, Ukraine
| |
Collapse
|
39
|
Ullah S, Ullah A, Lee J, Jeong Y, Hashmi M, Zhu C, Joo KI, Cha HJ, Kim IS. Reusability Comparison of Melt-Blown vs Nanofiber Face Mask Filters for Use in the Coronavirus Pandemic. ACS APPLIED NANO MATERIALS 2020; 3:7231-7241. [PMID: 37556250 PMCID: PMC7323055 DOI: 10.1021/acsanm.0c01562] [Citation(s) in RCA: 121] [Impact Index Per Article: 30.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2020] [Accepted: 06/12/2020] [Indexed: 05/17/2023]
Abstract
Shortage of face masks is a current critical concern since the emergence of coronavirus-2 or SARS-CoV-2 (COVID-19). In this work, we compared the melt-blown (MB) filter, which is commonly used for the N95 face mask, with nanofiber (NF) filter, which is gradually used as an effective mask filter, to evaluate their reusability. Extensive characterizations were performed repeatedly to evaluate some performance parameters, which include filtration efficiency, airflow rate, and surface and morphological properties, after two types of cleaning treatments. In the first cleaning type, samples were dipped in 75% ethanol for a predetermined duration. In the second cleaning type, 75% ethanol was sprayed on samples. It was found that filtration efficiency of MB filter was significantly dropped after treatment with ethanol, while the NF filter exhibited consistent high filtration efficiency regardless of cleaning types. In addition, the NF filter showed better cytocompatibility than the MB filter, demonstrating its harmlessness on the human body. Regardless of ethanol treatments, surfaces of both filter types maintained hydrophobicity, which can sufficiently prevent wetting by moisture and saliva splash to prohibit not only pathogen transmission but also bacterial growth inside. On the basis of these comparative evaluations, the wider use of the NF filter for face mask applications is highly recommended, and it can be reused multiple times with robust filtration efficiency. It would be greatly helpful to solve the current shortage issue of face masks and significantly improve safety for front line fighters against coronavirus disease.
Collapse
Affiliation(s)
- Sana Ullah
- Nano Fusion Technology Research Group,
Institute for Frontier Fibers, Shinshu
University, Ueda Campus, Nagano 386-0017,
Japan
| | - Azeem Ullah
- Nano Fusion Technology Research Group,
Institute for Frontier Fibers, Shinshu
University, Ueda Campus, Nagano 386-0017,
Japan
| | - Jaeyun Lee
- Department of Chemical Engineering,
Pohang University of Science and
Technology, Pohang 37673,
Korea
| | - Yeonsu Jeong
- Department of Chemical Engineering,
Pohang University of Science and
Technology, Pohang 37673,
Korea
| | - Motahira Hashmi
- Nano Fusion Technology Research Group,
Institute for Frontier Fibers, Shinshu
University, Ueda Campus, Nagano 386-0017,
Japan
| | - Chunhong Zhu
- Faculty of Textile Science &
Technology, Shinshu University, Ueda
Campus, Nagano 386-0017, Japan
| | - Kye Il Joo
- Department of Chemical Engineering,
Pohang University of Science and
Technology, Pohang 37673,
Korea
| | - Hyung Joon Cha
- Department of Chemical Engineering,
Pohang University of Science and
Technology, Pohang 37673,
Korea
| | - Ick Soo Kim
- Nano Fusion Technology Research Group,
Institute for Frontier Fibers, Shinshu
University, Ueda Campus, Nagano 386-0017,
Japan
| |
Collapse
|
40
|
Stelmakh SA, Grigor’eva MN, Garkusheva NM, Lebedeva SN, Ochirov OS, Mognonov DM, Zhamsaranova SD, Batoev VB. Studies of new biocidal polyguanidines: antibacterial action and toxicity. Polym Bull (Berl) 2020. [DOI: 10.1007/s00289-020-03197-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
|
41
|
Kim KM, Han SH, Yoo SY, Yoo JH. Potential Hazards of Concern in the Walk-Through Screening System for the Corona Virus Disease 2019 from the Perspective of Infection Preventionists. J Korean Med Sci 2020; 35:e156. [PMID: 32301301 PMCID: PMC7167405 DOI: 10.3346/jkms.2020.35.e156] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 01/27/2023] Open
Affiliation(s)
- Kyung Mi Kim
- Department of Nursing Science, College of Medicine, Chungbuk National University, Cheongju, Korea
| | - Su Ha Han
- Department of Nursing, Soonchunhyang University, Cheonan, Korea
| | - So Yeon Yoo
- College of Nursing, Gachon University, Incheon, Korea
| | - Jin Hong Yoo
- Division of Infectious Diseases, Department of Internal Medicine, Bucheon St. Mary's Hospital, Bucheon, Korea
- Division of Infectious Diseases, Department of Internal Medicine, College of Medicine, The Catholic University of Korea, Seoul, Korea.
| |
Collapse
|
42
|
Sterilization of Surgical Tools: Removing Bacterial Endospores with a Combination of Povidone-iodine, Chlorhexidine Gluconate, Ethanol, and Methanol. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.4.65] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
43
|
Velazquez S, Griffiths W, Dietz L, Horve P, Nunez S, Hu J, Shen J, Fretz M, Bi C, Xu Y, Van Den Wymelenberg KG, Hartmann EM, Ishaq SL. From one species to another: A review on the interaction between chemistry and microbiology in relation to cleaning in the built environment. INDOOR AIR 2019; 29:880-894. [PMID: 31429989 PMCID: PMC6852270 DOI: 10.1111/ina.12596] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 05/12/2023]
Abstract
Since the advent of soap, personal hygiene practices have revolved around removal, sterilization, and disinfection-both of visible soil and microscopic organisms-for a myriad of cultural, aesthetic, or health-related reasons. Cleaning methods and products vary widely in their recommended use, effectiveness, risk to users or building occupants, environmental sustainability, and ecological impact. Advancements in science and technology have facilitated in-depth analyses of the indoor microbiome, and studies in this field suggest that the traditional "scorched-earth cleaning" mentality-that surfaces must be completely sterilized and prevent microbial establishment-may contribute to long-term human health consequences. Moreover, the materials, products, activities, and microbial communities indoors all contribute to, or remove, chemical species to the indoor environment. This review examines the effects of cleaning with respect to the interaction of chemistry, indoor microbiology, and human health.
Collapse
Affiliation(s)
| | - Willem Griffiths
- Biology and the Built Environment CenterUniversity of OregonEugeneOR
| | - Leslie Dietz
- Biology and the Built Environment CenterUniversity of OregonEugeneOR
| | - Patrick Horve
- Biology and the Built Environment CenterUniversity of OregonEugeneOR
| | - Susie Nunez
- Biology and the Built Environment CenterUniversity of OregonEugeneOR
| | - Jinglin Hu
- Department of Civil and Environmental EngineeringNorthwestern UniversityEvanstonIL
| | - Jiaxian Shen
- Department of Civil and Environmental EngineeringNorthwestern UniversityEvanstonIL
| | - Mark Fretz
- Institute for Health and the Built EnvironmentUniversity of OregonPortlandOR
| | - Chenyang Bi
- Department of Civil Environmental EngineeringVirginia Polytechnic Institute and State UniversityBlacksburgVA
| | - Ying Xu
- Department of Building ScienceTsinghua UniversityBeijingChina
| | - Kevin G. Van Den Wymelenberg
- Biology and the Built Environment CenterUniversity of OregonEugeneOR
- Institute for Health and the Built EnvironmentUniversity of OregonPortlandOR
| | - Erica M. Hartmann
- Department of Civil and Environmental EngineeringNorthwestern UniversityEvanstonIL
| | - Suzanne L. Ishaq
- Biology and the Built Environment CenterUniversity of OregonEugeneOR
| |
Collapse
|
44
|
da Fonseca ER, Santana PP, Xible AA, Curtis DA, Kano SC. Effect of 0.2% peracetic acid disinfection on the horizontal dimension of implant framework indexed with two autopolymerized acrylic resins. Int J Implant Dent 2019; 5:35. [PMID: 31531734 PMCID: PMC6749003 DOI: 10.1186/s40729-019-0186-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Accepted: 08/23/2019] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To minimize misfit between prosthesis and implant, the welding of the implant fixed partial denture (IFPD) framework is recommended and autopolymerized acrylic resin (AR) is the material of choice for the indexing process. As for any prosthetic device that comes into contact with saliva and blood in the oral cavity, IFPD indexed with AR must be disinfected before sending to the laboratory. However, disinfection procedures are often neglected for fear of shrinkage or distortion caused by a dimensional change of the acrylic resin. Peracetic acid is a high-level disinfectant agent at low concentrations and immersion time, with no reported toxic residues, and it is not inactivated in the presence of organic matter when compared to other disinfectants. This study aimed to evaluate the influence of 0.2% peracetic acid disinfectant solution after different storage media and times on the horizontal dimension of IFPD frameworks indexed with AR. MATERIAL AND METHODS IFPD frameworks were indexed with two AR: group 1 Duralay and group 2 Pattern Resin LS. Each group was further divided into five subgroups according to disinfection procedure and storage medium: no disinfection and dry storage, no disinfection and water storage, 0.2% peracetic acid disinfection and water storage, 0.2% peracetic acid disinfection and peracetic acid storage, and 0.2% peracetic acid disinfection and dry storage. The horizontal dimension of the specimens and an average was established for analysis. Measurements were performed at four different storage times (hours): T0, T24, T48, T168. RESULTS No statistical differences were found when T0 was compared to T168 for Pattern resin groups submitted to disinfection and storage in water (group 2b, p = 1.000) or peracetic acid solution (group 2c, p = 0.352). For Duralay groups, the use of peracetic acid solution did not affect the horizontal dimension of the specimens when T0 was compared to T168 only with water as a storage medium (group 1b, p = 1.000). Additionally, T0 did not differ from T24 for groups 1c (p = 0.553), 2b (p = 1.000), 2d (p = 0.234), and 2e (p = 1.000) and from T48 for groups 1d (p = 0.118) and 2b (p = 1.000). CONCLUSION Within the studied conditions, the use of 0.2% peracetic acid can be safely used as a disinfectant solution regarding dimensional stability of AR-indexed IFPD until 7 days of storage. Horizontal discrepancies are dependent on acrylic resin type, time, and medium of storage.
Collapse
Affiliation(s)
- Emanuely Ronconi da Fonseca
- Clinical Dentistry Master Program, Universidade Federal do Espiríto Santo, Av. Marechal Campos, 1468 - Maruípe, Vitória, ES, 29040-090, Brazil
| | - Paula Pereira Santana
- Clinical Dentistry Master Program, Universidade Federal do Espiríto Santo, Av. Marechal Campos, 1468 - Maruípe, Vitória, ES, 29040-090, Brazil
| | - Anuar Antonio Xible
- Department of Prosthodontic, Universidade Federal do Espírito Santo, Av. Marechal Campos, 1468 - Maruípe, Vitória, ES, 29040-090, Brazil
| | - Donald A Curtis
- Department of Preventive and Restorative Dental Sciences, School of Dentistry, University of California, San Francisco, 707 Parnassus Avenue, San Francisco, CA, 94143-0758, USA
| | - Stefania Carvalho Kano
- Department of Prosthodontic, Universidade Federal do Espírito Santo, Av. Marechal Campos, 1468 - Maruípe, Vitória, ES, 29040-090, Brazil.
| |
Collapse
|
45
|
Galiano F, Mancuso R, Guzzo MG, Lucente F, Gukelberger E, Losso MA, Figoli A, Hoinkis J, Gabriele B. New Polymeric Films with Antibacterial Activity Obtained by UV-induced Copolymerization of Acryloyloxyalkyltriethylammonium Salts with 2-Hydroethyl Methacrylate. Int J Mol Sci 2019; 20:E2696. [PMID: 31159299 PMCID: PMC6600214 DOI: 10.3390/ijms20112696] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2019] [Revised: 05/29/2019] [Accepted: 05/30/2019] [Indexed: 11/16/2022] Open
Abstract
New polymeric films with antibacterial activity have been prepared, by simple UV-induced copolymerization of readily available ω-(acryloyloxy)-N,N,N-triethylalcan-1-aminium bromides (or acryloyloxyalkyltriethylammonium bromides, AATEABs) with commercially available 2-hydroethyl methacrylate (HEMA), at different relative amounts. In particular, the antibacterial activity of polymeric films derived from 11-(acryloyloxy)-N,N,N-triethylundecan-1-aminium bromide (or acryloyloxyundecyltriethylammonium bromide, AUTEAB; bearing a C-11 alkyl chain linker between the acrylate polymerization function and the quaternary ammonium moiety) and 12-(acryloyloxy)-N,N,N-triethyldodecan-1-aminium bromide (or acryloyldodecyltriethylammonium bromide, ADTEB, bearing a C-12 alkyl chain linker) has been assessed against Gram-negative Escherichia Coli and Gram-positive Staphylococcus aureus cells. The results obtained have shown a clear concentration-dependent activity against both bacterial strains, the films obtained from homopolymerization of pure AUTEAB and ADTEAB being the most effective. Moreover, ADTEAB-based films showed a higher antibacterial activity with respect to the AUTEAB-based ones. Interestingly, however, both types of films presented a significant activity not only toward Gram-positive S. aureus, but also toward Gram-negative E. Coli cells.
Collapse
Affiliation(s)
- Francesco Galiano
- Institute on Membrane Technologies (ITM-CNR), Via Pietro Bucci 17/C, 87036 Arcavacata di Rende (CS), Italy.
| | - Raffaella Mancuso
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Arcavacata di Rende (CS), Italy.
| | - Maria Grazia Guzzo
- Department of Biology, Ecology, and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata di Rende (CS), Italy.
| | - Fabrizio Lucente
- Department of Biology, Ecology, and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata di Rende (CS), Italy.
| | - Ephraim Gukelberger
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Arcavacata di Rende (CS), Italy.
- University of Applied Sciences Karlsruhe, Center of Applied Research (CAR), Moltkestraße 30, 76133 Karlsruhe, Germany.
| | - Maria Adele Losso
- Department of Biology, Ecology, and Earth Sciences (DiBEST), University of Calabria, 87036 Arcavacata di Rende (CS), Italy.
| | - Alberto Figoli
- Institute on Membrane Technologies (ITM-CNR), Via Pietro Bucci 17/C, 87036 Arcavacata di Rende (CS), Italy.
| | - Jan Hoinkis
- University of Applied Sciences Karlsruhe, Center of Applied Research (CAR), Moltkestraße 30, 76133 Karlsruhe, Germany.
| | - Bartolo Gabriele
- Laboratory of Industrial and Synthetic Organic Chemistry (LISOC), Department of Chemistry and Chemical Technologies, University of Calabria, 87036 Arcavacata di Rende (CS), Italy.
| |
Collapse
|
46
|
Storage of Sputum in Cetylpyridinium Chloride, OMNIgene.SPUTUM, and Ethanol Is Compatible with Molecular Tuberculosis Diagnostic Testing. J Clin Microbiol 2019; 57:JCM.00275-19. [PMID: 31092592 PMCID: PMC6595455 DOI: 10.1128/jcm.00275-19] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 05/05/2019] [Indexed: 11/24/2022] Open
Abstract
We compared cetylpyridinium chloride (CPC), ethanol (ETOH), and OMNIgene.SPUTUM (OMNI) for 28-day storage of sputum at ambient temperature before molecular tuberculosis diagnostics. Three sputum samples were collected from each of 133 smear-positive tuberculosis (TB) patients (399 sputum samples). We compared cetylpyridinium chloride (CPC), ethanol (ETOH), and OMNIgene.SPUTUM (OMNI) for 28-day storage of sputum at ambient temperature before molecular tuberculosis diagnostics. Three sputum samples were collected from each of 133 smear-positive tuberculosis (TB) patients (399 sputum samples). Each patient’s sputum was stored with either CPC, ETOH, or OMNI for 28 days at ambient temperature, with subsequent rpoB amplification targeting a short fragment (81 bp, GeneXpert MTB/RIF [Xpert]) or a long fragment (1,764 bp, in-house nested PCR). For 36 patients, Xpert was also performed at baseline on all 108 fresh sputum samples. After the 28-day storage (D28), Xpert positivity did not significantly differ between storage methods. In contrast, higher positivity for rpoB nested PCR was obtained with OMNI (n = 125, 94%) than with ETOH (n = 114, 85.7%; P = 0.001). Smears with scanty acid-fast bacilli (AFB) had lower rpoB PCR positivity with ETOH storage (n = 10, 41.7%) than with CPC (n = 16, 66.7%; difference, 25%; 95% confidence interval [CI], 3.5 to 46.5; P = 0.031) or OMNI (n = 16, 69.6%; difference, 26.1%; 95% CI, 3.8 to 48.4; P = 0.031), with no difference between CPC and OMNI. Poststorage, the threshold cycle (CT) values significantly decreased compared to those prestorage with ETOH (difference, −1.1; 95% CI, −1.6 to −0.6; P = 0.0001) but not with CPC (P = 0.915) or OMNI (P = 0.33). For one patient’s ETOH- and CPC-stored specimens with a CT of <10, Xpert gave results of rifampin false resistant at D28, which was resolved by repeating Xpert on a 1/100 diluted specimen. In conclusion, 28-day storage of sputum in OMNI, CPC, or ETOH at ambient temperature does not impact short-fragment PCR (Xpert), including for low smear grades. However, for long-fragment PCR, ETOH yielded a lower PCR positivity for low smear grades, while the performance of OMNI and CPC was excellent for all smear grades. (The study has been registered at ClinicalTrials.gov under registration number NCT02744469.)
Collapse
|
47
|
Pisani S, Dorati R, Chiesa E, Genta I, Modena T, Bruni G, Grisoli P, Conti B. Release Profile of Gentamicin Sulfate from Polylactide- co-Polycaprolactone Electrospun Nanofiber Matrices. Pharmaceutics 2019; 11:E161. [PMID: 30987212 PMCID: PMC6523179 DOI: 10.3390/pharmaceutics11040161] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 03/28/2019] [Accepted: 03/30/2019] [Indexed: 11/30/2022] Open
Abstract
The advent and growth of resistance phenomena to antibiotics has reached critical levels, invalidating the action of a majority of antibiotic drugs currently used in the clinical field. Several innovative techniques, such as the nanotechnology, can be applied for creating innovative drug delivery systems designed to modify drug release itself and/or drug administration route; moreover, they have proved suitable for overcoming the phenomenon of antibiotic resistance. Electrospun nanofibers, due to their useful structural properties, are showing promising results as antibiotic release devices for preventing bacteria biofilm formation after surgical operation and for limiting resistance phenomena. In this work gentamicin sulfate (GS) was loaded into polylactide-co-polycaprolactone (PLA-PCL) electrospun nanofibers; quantification and in vitro drug release profiles in static and dynamic conditions were investigated; GS kinetic release from nanofibers was studied using mathematical models. A preliminary microbiological test was carried out towards Staphylococcus aureus and Escherichia coli bacteria.
Collapse
Affiliation(s)
- Silvia Pisani
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
| | - Rossella Dorati
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
- Polymerix S.r.l., Via Taramelli 24, 27100 Pavia, Italy.
| | - Enrica Chiesa
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
| | - Ida Genta
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
| | - Tiziana Modena
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
- Polymerix S.r.l., Via Taramelli 24, 27100 Pavia, Italy.
| | - Giovanna Bruni
- Department of Chemistry, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
| | - Pietro Grisoli
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
| | - Bice Conti
- Department of Drug Sciences, University of Pavia, Viale Taramelli 12/14, 27100 Pavia, Italy.
- Polymerix S.r.l., Via Taramelli 24, 27100 Pavia, Italy.
| |
Collapse
|