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Withey Z, Gweon HS. Longitudinal bacterial community dynamics and sodium hypochlorite intervention in a newly built university building. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 950:175349. [PMID: 39122041 DOI: 10.1016/j.scitotenv.2024.175349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 07/05/2024] [Accepted: 08/05/2024] [Indexed: 08/12/2024]
Abstract
Urbanisation and building advancements have increased microbial growth in indoor environments, altering human interactions with these microorganisms. Restrooms and their sinks harbour diverse bacterial communities, that differ from those found in natural environments, that could have negative implications for human health. Over two and a half years, this study examined the diversity, temporal dynamics, and resilience of bacterial communities in restroom sink P-traps in a newly built university building. Structured into two phases, the first phase consisted of continuous monitoring of bacterial community dynamics for two years (n = 352), while the second phase involved an intervention with sodium hypochlorite (bleach) and subsequent sampling (n = 132). In the first phase, we show that sink communities converge, becoming more compositionally similar to other sinks within the building. Bacterial families such as Rhodocyclaceae and Flavobacteriaceae dominated across the sinks, and others such as Comamonadaceae, Moraxellaceae and Enterbacteriaceae were highly prevalent. When comparing bacterial structure and composition to other sinks located on the university campus, the mean bacterial dissimilarity decreased over time, indicating compositional similarity, particularly with the newer buildings on campus. The second phase demonstrated resilience by the bacterial sink communities. Following bleach treatments, a distinct increase in Acinetobacter was observed. However, by the fourth week after bleach invention, bacterial communities had re-established to levels observed prior to treatment. This study had the unique opportunity to sample a newly built building before occupancy and for the subsequent two and a half years. The findings provide crucial insights into the development and resilience of sink P-trap bacterial communities in restrooms, laying the groundwork for more targeted approaches to disinfection strategies.
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Affiliation(s)
- Zoe Withey
- School of Biological Sciences, University of Reading, Reading, UK
| | - Hyun S Gweon
- School of Biological Sciences, University of Reading, Reading, UK; UK Centre for Ecology & Hydrology, Wallingford, Oxfordshire OX10 8BB, UK.
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2
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Murashevych B, Bilenkyi G, Girenko D, Bilenkyi E. N-Chlorotaurine Solutions as Agents for Infusion Detoxification Therapy: Preclinical Studies. Int J Mol Sci 2024; 25:8345. [PMID: 39125912 PMCID: PMC11313245 DOI: 10.3390/ijms25158345] [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: 06/16/2024] [Revised: 07/18/2024] [Accepted: 07/19/2024] [Indexed: 08/12/2024] Open
Abstract
N-chlorotaurine (NCT) is a broad-spectrum antimicrobial agent with outstanding tolerability, effective for topical and inhalation use. This paper presents the results of studies of single and repeated intravenous infusions of NCT to laboratory animals. The studies were conducted on female Wistar Han rats. The effect of NCT infusions on the general condition, behavioral reactions, main biochemical and hematological parameters, hemocoagulation system, cardiovascular system, and on the condition of the internal organs was studied. It was found that NCT infusions do not reveal deviations in the studied parameters that could indicate a toxic effect. The estimated LD50 is more than 80 mg/kg. In a subchronic experiment, a statistically significant decrease in cholesterol (by up to 11%), glucose (by up to 15%) and excess bases (up to four times) in the blood, and an increase in heart rate (by up to 31%) and frequency of defecations (by up to 35%), as well as pronounced antiplatelet effect, were found. In animals with simulated endotoxicosis, a decrease in the cytolysis and oxidative stress markers was observed. Such effects are caused by both chlorine-active compounds and taurine.The results obtained indicate broad prospects for the use of NCT solutions as an infusion detoxifying agent.
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Affiliation(s)
- Bohdan Murashevych
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, 49044 Dnipro, Ukraine
| | - Gennadii Bilenkyi
- Clinical Hospital of Emergency Medical Care of the Dnipro City Council, 65 Volodymyra Antonovycha Str., 49000 Dnipro, Ukraine
| | - Dmitry Girenko
- Department of Physical Chemistry, Ukrainian State University of Chemical Technology, 8 Gagarina Ave., 49005 Dnipro, Ukraine;
| | - Emil Bilenkyi
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, 49044 Dnipro, Ukraine
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Onetto AL, Novosak MG, Winnik DL, Cortese IJ, Stockmanns PE, Oviedo PN, Laczeski ME. Screening of antimicrobial activity of Ilex paraguariensis St. Hil. leaf extracts against carbapenemase-producing bacteria. AN ACAD BRAS CIENC 2024; 96:e20221129. [PMID: 38922267 DOI: 10.1590/0001-3765202420221129] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Accepted: 09/21/2023] [Indexed: 06/27/2024] Open
Abstract
I. paraguariensis St. Hil. is a south American species of agronomic interest with studies supporting its medicinal properties. As the investigation of active ingredients with antimicrobial effect from medicinal plants is a suitable approach to the current antibacterial resistance problem, the aim of the present study was to determine the antibacterial activity of yerba mate ethanolic extracts against carbapenemase-producing gram-negative bacteria (reference strains and clinical isolates). Extracts showed antibacterial activity against Klebsiella pneumoniae ATCC® BAA-2342™ (KPC producing), Providencia rettgeri (NDM producing), Pseudomonas aeruginosa (MBL producing) and P. aeruginosa (VIM producing) at the concentrations tested. The Minimal-Inhibitory-Concentration and Minimal-Bactericidal-Concentration values ranged between 1 and 32 mg.ml-1 for the reference strains, and between 0.125 and 1 mg.ml-1 for the clinical isolates. The MBC/MIC index characterized the extracts as bactericidal. The combinations of commercial antibiotics and extracts showed a synergistic action on the reference strains studied. The lethal concentration 50 obtained using the Artemia salina toxicity assay were higher than 1 mg.ml-1 for all the extracts, indicating a low toxicity. The in vitro activity and low toxicity suggest that ethanolic I. paraguariensis leaf extracts constitute an outstanding source for new antibacterial compounds, and further studies should be carried out to understand their mechanism of action.
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Affiliation(s)
- Andrea Liliana Onetto
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Biotecnología Misiones "Dra. María Ebe Reca" (InBioMis), Laboratorio de Biotecnología Molecular, Ruta 12 Km 7 1/2, CP 3304, Misiones, Argentina
- CONICET, Buenos Aires, Argentina
| | - Marina Gisel Novosak
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
| | - Daniana Liliana Winnik
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
| | - Iliana Julieta Cortese
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Biotecnología Misiones "Dra. María Ebe Reca" (InBioMis), Laboratorio de Biotecnología Molecular, Ruta 12 Km 7 1/2, CP 3304, Misiones, Argentina
- CONICET, Buenos Aires, Argentina
| | - Patricia Elizabeth Stockmanns
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
| | - Patricia Noemí Oviedo
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
| | - Margarita Ester Laczeski
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Ciencias de la Salud de Misiones (InCiSMi), Departamento de Microbiología, Laboratorio de Bacteriología, Avda. Mariano Moreno 1375, CP 3300, Misiones, Argentina
- Universidad Nacional de Misiones, Facultad de Ciencias Exactas, Químicas y Naturales, Instituto de Biotecnología Misiones "Dra. María Ebe Reca" (InBioMis), Laboratorio de Biotecnología Molecular, Ruta 12 Km 7 1/2, CP 3304, Misiones, Argentina
- CONICET, Buenos Aires, Argentina
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Kuznetsova TV, Kudryavtseva VA, Kapranova LL. Increasing Risks to the Health of the Invertebrates-Balancing between Harm and Benefit. Animals (Basel) 2024; 14:1584. [PMID: 38891631 PMCID: PMC11170989 DOI: 10.3390/ani14111584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 05/23/2024] [Accepted: 05/24/2024] [Indexed: 06/21/2024] Open
Abstract
The article discusses the issue of extensive use of detergents and sanitizers in the time of new challenges associated with the COVID-19 (SARS-CoV-2) pandemic. These agents could pose threats to the existence of free-living invertebrates as essential components of the ecosystem. The biological effects of the mentioned classes of substances, their metabolites, and combined effects in the mixture have not been studied enough. The main challenges in trying to balance the threats and benefits of using such substances are the lack of knowledge of the biological effects of these products, the gaps in testing invertebrates' responses, and changes in environment-related regulations to minimize risks to animals and humans. Numerous studies in this field still leave research gaps, particularly concerning the combined toxicity of well-known and widely used disinfectants, surfactants, and heavy metals, posing potential future challenges. Additionally, the review identified the need for additional testing of invertebrates for their sensitivity to disinfectants and surfactants of different compositions, including improved (non-invasive) methods, studies for early life stages, and comparative studies of species resilience.
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Affiliation(s)
- Tatiana V. Kuznetsova
- St. Petersburg Federal Research Center of the Russian Academy of Sciences, 199178 St. Petersburg, Russia;
| | - Valentina A. Kudryavtseva
- St. Petersburg Federal Research Center of the Russian Academy of Sciences, 199178 St. Petersburg, Russia;
| | - Larisa L. Kapranova
- A.O. Kovalevsky Institute of Biology of the Southern Seas of the Russian Academy of Sciences, 299011 Sevastopol, Russia;
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Koti K, Rodas-Gonzalez A, Nadon C, McAllister T, Yang X, Narváez-Bravo C. Evaluating disinfectant efficacy on mixed biofilms comprising Shiga toxigenic Escherichia coli, lactic acid bacteria, and spoilage microorganisms. Front Microbiol 2024; 15:1360645. [PMID: 38633705 PMCID: PMC11021663 DOI: 10.3389/fmicb.2024.1360645] [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: 12/23/2023] [Accepted: 03/07/2024] [Indexed: 04/19/2024] Open
Abstract
This study aimed to investigate the impact of temperature and the presence of other microorganisms on the susceptibility of STEC to biocides. Mature biofilms were formed at both 10°C and 25°C. An inoculum of planktonic bacteria comprising 106 CFU/mL of spoilage bacteria and 103 CFU/mL of a single E. coli strain (O157, O111, O103, and O12) was used to form mixed biofilms. The following bacterial combinations were tested: T1: Carnobacterium piscicola + Lactobacillus bulgaricus + STEC, T2: Comamonas koreensis + Raoultella terrigena + STEC, and T3: Pseudomonas aeruginosa + C. koreensis + STEC. Tested biocides included quaternary ammonium compounds (Quats), sodium hypochlorite (Shypo), sodium hydroxide (SHyd), hydrogen peroxide (HyP), and BioDestroy®-organic peroxyacetic acid (PAA). Biocides were applied to 6-day-old biofilms. Minimum Bactericidal Concentrations (MBC) and Biofilm Eradication Concentrations (BEC) were determined. Planktonic cells and single-species biofilms exhibited greater susceptibility to sanitizers (p < 0.0001). Lactobacillus and Carnobacterium were more susceptible than the rest of the tested bacteria (p < 0.0001). Single species biofilms formed by E. coli O111, O121, O157, and O45 showed resistance (100%) to Shypo sanitizer (200 ppm) at 25°C. From the most effective to the least effective, sanitizer performance on single-species biofilms was PAA > Quats > HyP > SHyd > Shypo. In multi-species biofilms, spoilage bacteria within T1, T2, and T3 biofilms showed elevated resistance to SHyd (30%), followed by quats (23.25%), HyP (15.41%), SHypo (9.70%), and BioDestroy® (3.42%; p < 0.0001). Within T1, T2, and T3, the combined STEC strains exhibited superior survival to Quats (23.91%), followed by HyP (19.57%), SHypo (18.12%), SHyd (16.67%), and BioDestroy® (4.35%; p < 0.0001). O157:H7-R508 strains were less tolerant to Quats and Shypo when combined with T2 and T3 (p < 0.0001). O157:H7 and O103:H2 strains in mixed biofilms T1, T2, and T3 exhibited higher biocide resistance than the weak biofilm former, O145:H2 (p < 0.0001). The study shows that STEC within multi-species biofilms' are more tolerant to disinfectants.
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Affiliation(s)
- Kavitha Koti
- Department of Food and Human Nutritional Science, University of Manitoba, Winnipeg, MB, Canada
| | | | - Celine Nadon
- National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB, Canada
| | - Tim McAllister
- Department of Food and Human Nutritional Science, University of Manitoba, Winnipeg, MB, Canada
- Agriculture and Agri-Food Canada, Lethbridge Research and Development Centre, Lethbridge, AB, Canada
| | - Xianqin Yang
- Agriculture and Agri-Food Canada, Lacombe Research and Development Centre, Lacombe, AB, Canada
| | - Claudia Narváez-Bravo
- Department of Food and Human Nutritional Science, University of Manitoba, Winnipeg, MB, Canada
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6
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Wu-Chen RA, Feng J, Elhadidy M, Nambiar RB, Liao X, Yue M, Ding T. Long-term exposure to food-grade disinfectants causes cross-resistance to antibiotics in Salmonella enterica serovar Typhimurium strains with different antibiograms and sequence types. Antimicrob Resist Infect Control 2023; 12:145. [PMID: 38093321 PMCID: PMC10717106 DOI: 10.1186/s13756-023-01333-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2023] [Accepted: 11/09/2023] [Indexed: 12/17/2023] Open
Abstract
BACKGROUND Disinfectants are important in the food industry to prevent the transmission of pathogens. Excessive use of disinfectants may increase the probability of bacteria experiencing long-term exposure and consequently resistance and cross-resistance to antibiotics. This study aims to investigate the cross-resistance of multidrug-resistant, drug-resistant, and drug-susceptible isolates of Salmonella enterica serovar Typhimurium (S. Typhimurium) with different sequence types (STs) to a group of antibiotics after exposure to different food-grade disinfectants. METHODS A panel of 27 S. Typhimurium strains with different antibiograms and STs were exposed to increasing concentrations of five food-grade disinfectants, including hydrogen peroxide (H2O2), benzalkonium chloride (BAC), chlorine dioxide (ClO2), sodium hypochlorite (NaClO), and ethanol. Recovered evolved strains were analyzed using genomic tools and phenotypic tests. Genetic mutations were screened using breseq pipeline and changes in resistance to antibiotics and to the same disinfectant were determined. The relative fitness of evolved strains was also determined. RESULTS Following exposure to disinfectants, 22 out of 135 evolved strains increased their resistance to antibiotics from a group of 14 clinically important antibiotics. The results also showed that 9 out of 135 evolved strains had decreased resistance to some antibiotics. Genetic mutations were found in evolved strains. A total of 77.78% of ST34, 58.33% of ST19, and 66.67% of the other STs strains exhibited changes in antibiotic resistance. BAC was the disinfectant that induced the highest number of strains to cross-resistance to antibiotics. Besides, H2O2 induced the highest number of strains with decreased resistance to antibiotics. CONCLUSIONS These findings provide a basis for understanding the effect of disinfectants on the antibiotic resistance of S. Typhimurium. This work highlights the link between long-term exposure to disinfectants and the evolution of resistance to antibiotics and provides evidence to promote the regulated use of disinfectants.
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Affiliation(s)
- Ricardo A Wu-Chen
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Jinsong Feng
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
| | - Mohamed Elhadidy
- Biomedical Sciences Program, University of Science and Technology, Zewail City of Science and Technology, Giza, Egypt
- Center for Genomics, Helmy Institute for Medical Sciences, Zewail City of Science and Technology, Giza, Egypt
- Department of Bacteriology, Mycology and Immunology, Faculty of Veterinary Medicine, Mansoura University, Mansoura, Egypt
| | - Reshma B Nambiar
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Xinyu Liao
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China
- Future Food Laboratory, Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, 314100, China
| | - Min Yue
- College of Animal Sciences, Zhejiang University, Hangzhou, 310058, China.
| | - Tian Ding
- Department of Food Science and Nutrition, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, China.
- Future Food Laboratory, Innovation Center of Yangtze River Delta, Zhejiang University, Jiaxing, 314100, China.
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Ma Z, Wang H, Zhou Q, Liang B, Li M, Wang P, Zhan S. Energy efficient portable air cathode electrochlorinator for point-of-use disinfection of toilet wastewater. JOURNAL OF HAZARDOUS MATERIALS 2023; 448:130793. [PMID: 36731314 DOI: 10.1016/j.jhazmat.2023.130793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 01/03/2023] [Accepted: 01/12/2023] [Indexed: 06/18/2023]
Abstract
Active chlorine is the most widely used disinfectant for water disinfection as well as surface sterilization. Here, we report an air cathode electrochlorinator for point-of-use disinfection of toilet wastewater. The air cathode dominated by a four-electron pathway to reduce O2 to OH- was more suitable for chlorine synthesis than through a two-electron pathway to H2O2, which could reduce chlorine back to chloride ions. The minimum driving potential of the air cathode electrochlorinator was as low as 0.94 V, which made it possible to be directly powered by a piece of commercial mini photovoltaic solar panel without electronic converter. Under the cell voltage of 2 V, the Faraday current efficiency was 82.0 % and the electrical energy required to produce 1 kg active chlorine was estimated to be only 1.75 kWh. The normalized energy consumption to disinfect simulated toilet wastewater with a pathogen concentration of 107 CFU/mL was estimated to be 7.2 W h/m3. Moreover, the material cost for fabrication of the electrochlorinator was estimated to be less than $ 0.62. These features guarantee the air cathode electrochlorinator of high potential for point-of-use disinfection of toilet wastewater.
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Affiliation(s)
- Zhihui Ma
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, 300350 Tianjin, China; Carbon Neutrality Interdisciplinary Science Center, Nankai University, 300350 Tianjin, China
| | - Haitao Wang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, 300350 Tianjin, China.
| | - Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, 300350 Tianjin, China; Carbon Neutrality Interdisciplinary Science Center, Nankai University, 300350 Tianjin, China
| | - Bolong Liang
- College of Ecology and Environment, Hebei University, Baoding 071002, China
| | - Mingmei Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, 300350 Tianjin, China
| | - Pengfei Wang
- Tianjin Key Laboratory of Clean Energy and Pollution Control, School of Energy and Environmental Engineering, Hebei University of Technology, Tianjin 300401, China
| | - Sihui Zhan
- MOE Key Laboratory of Pollution Processes and Environmental Criteria, College of Environmental Science and Engineering, Nankai University, 300350 Tianjin, China.
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Stoufer S, Demokritou M, Buckley D, Teska P, Moore MD. Evaluation of the ability of commercial disinfectants to degrade free nucleic acid commonly targeted using molecular diagnostics. J Hosp Infect 2023; 133:28-37. [PMID: 36565931 DOI: 10.1016/j.jhin.2022.12.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 12/09/2022] [Accepted: 12/10/2022] [Indexed: 12/24/2022]
Abstract
BACKGROUND Polymerase chain reaction (PCR) is an essential tool for rapid detection of pathogens, but is susceptible to cross-contamination by residual nucleic acid, leading to false-positive results. Adequate surface decontamination would help prevent this, but most protocols target infectious microbes rather than free nucleic acid. The aim of this study was to evaluate the ability of commercial surface disinfectants to degrade different representative classes of nucleic acid. METHODS Commercial surface disinfectants with various active ingredients, as well as 10% chlorine bleach, were tested. Nucleic acid was dried on to stainless steel coupons and treated with disinfectant for 0-4 min prior to neutralization and quantification by quantitative reverse transcription PCR. The effective disinfectants were also evaluated in the presence of organic load. RESULTS Only dilute chlorine bleach and the hypochlorite-based commercial disinfectant significantly degraded any type of free nucleic acid. Hydrogen-peroxide- and quaternary-ammonium-based disinfectants gave <1 log reduction after 4 min for all targets. Results were time-dependent for each target, which underscores the importance of adequate contact time. Organic load appeared to have little impact on the efficacy of hypochlorite-based disinfectants for nucleic acid degradation. CONCLUSIONS This study demonstrates the importance of proper selection and application of disinfectant to remove residual nucleic acid when processing samples for molecular diagnostic testing.
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Affiliation(s)
- S Stoufer
- Department of Food Science, University of Massachusetts, Amherst, MA, USA.
| | - M Demokritou
- Department of Food Science, University of Massachusetts, Amherst, MA, USA
| | | | - P Teska
- Diversey Inc., Fort Mill, SC, USA
| | - M D Moore
- Department of Food Science, University of Massachusetts, Amherst, MA, USA
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Wu RA, Feng J, Yue M, Liu D, Ding T. Overuse of food-grade disinfectants threatens a global spread of antimicrobial-resistant bacteria. Crit Rev Food Sci Nutr 2023; 64:6870-6879. [PMID: 36756870 DOI: 10.1080/10408398.2023.2176814] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Food-grade disinfectants are extensively used for microbial decontamination of food processing equipment. In recent years, food-grade disinfectants have been increasingly used. However, the overuse of disinfectants causes another major issue, which is the emergence and spread of antimicrobial-resistant bacteria on a global scale. As the ongoing pandemic takes global attention, bacterial infections with antibiotic resistance are another ongoing pandemic that often goes unnoticed and will be the next real threat to humankind. Here, the effects of food-grade disinfectant overuse on the global emergence and spread of antimicrobial-resistant bacteria were reviewed. It was found that longtime exposure to the most common food-grade disinfectants promoted resistance to clinically important antibiotics in pathogenic bacteria, namely cross-resistance. Currently, the use of disinfectants is largely unregulated. The mechanisms of cross-resistance are regulated by intrinsic molecular mechanisms including efflux pumps, DNA repair system, modification of the molecular target, and metabolic adaptation. Cross-resistance can also be acquired by mobile genetic elements. Long-term exposure to disinfectants has an impact on the dissemination of antimicrobial resistance in soil, plants, animals, water, and human gut environments.
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Affiliation(s)
- Ricardo A Wu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Jinsong Feng
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
| | - Min Yue
- College of Animal Sciences, Zhejiang University, Hangzhou, China
| | - Donghong Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
- Ningbo Research Institute, Zhejiang University, Ningbo, China
| | - Tian Ding
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, China
- Ningbo Research Institute, Zhejiang University, Ningbo, China
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10
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Lindblad M, Sütterlin S, Tano E, Huss F, Lytsy B. Infection control measures to stop the spread of sequence type 15 OXA-23-producing Acinetobacter baumannii in a Swedish Burn Center. Burns 2022; 48:1940-1949. [PMID: 35148917 DOI: 10.1016/j.burns.2022.01.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 01/19/2022] [Accepted: 01/21/2022] [Indexed: 12/15/2022]
Abstract
OBJECTIVE To describe the course of the outbreak and infection control measures to stop the spread of sequence type 15 OXA-23-producing Acinetobacter baumannii in the Burn Center of Uppsala University Hospital, between November 2014 and the end of April 2015. METHODS Compliance with hand hygiene, dress code, and cleaning routines were reviewed, the ward's environment was systematically investigated to identify potential environmental sources. Sampling routines for A. baumannii, from patients and environment, were established, and the epidemiological relationship was analysed for all carbapenem-resistant A. baumannii isolates using arbitrarily primed polymerase chain reaction (AP-PCR) and pulsed-field gel electrophoresis (PFGE). RESULTS A total of 54 patients were treated at the burn intensive care unit during the studied, approximately five months period, and an OXA-23-producing A. baumannii was isolated from nine patients (9/54, 17%), whereof two died (2/9, 22.2%). All isolates shared identical PFGE-genotype patterns and belonged to sequence type 15; AP-PCR was eligible for prompt epidemiological investigations. CONCLUSIONS Higher awareness and increased compliance with hand hygiene and dress code as well as intensified cleaning protocols of the environment and equipment were successfully established and likely to have led to stop the spread of sequence type 15 OXA-23-producing Acinetobacter baumannii.
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Affiliation(s)
- Marie Lindblad
- Department of Surgical Sciences, Plastic Surgery, Uppsala University, Sweden; Burn Center, Department of Plastic and Maxillofacial Surgery, Uppsala University Hospital, Sweden.
| | - Susanne Sütterlin
- Department of Women´s and Children´s Health, International Maternal and Child Health, Uppsala University, Sweden
| | - Eva Tano
- Department of Medical Sciences, Section of Clinical Microbiology, Uppsala University, Sweden
| | - Fredrik Huss
- Department of Surgical Sciences, Plastic Surgery, Uppsala University, Sweden; Burn Center, Department of Plastic and Maxillofacial Surgery, Uppsala University Hospital, Sweden
| | - Birgitta Lytsy
- Department of Medical Sciences, Section of Clinical Microbiology, Uppsala University, Sweden
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Yoon JH, Kim JY, Bae YM, Lee SY. Control of Salmonella enterica serovar Typhimurium and Listeria monocytogenes on lettuce and radish sprouts by combined treatments with thymol, acetic acid, and ultrasound. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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12
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Liu Y, Fang Y, Chen Y, Chen W, Cheng Z, Yi J, Li X, Gao C, Wu F, Guo B. Improving intestinal absorption and antibacterial effect of florfenicol via nanocrystallisation technology. J Microencapsul 2022; 39:589-600. [PMID: 36369854 DOI: 10.1080/02652048.2022.2145381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
To study the effects of nanocrystallisation technology on the intestinal absorption properties and antibacterial activity of florfenicol (FF). The florfenicol nanocrystals (FF-NC) were prepared by wet grinding and spray drying. Additionally, changes in particle size, charge, morphology, and dissolution of FF-NC in the long-term stability were monitored by laser particle sizer, TEM, SEM, paddle method, and the structure of FF-NC powder was characterised by nuclear magnetic resonance (NMR) test. The antibacterial activity, intestinal absorption and intestinal histocompatibility of FF-NC were investigated by the stiletto, mini broth dilution susceptibility test, in situ single-pass intestinal perfusion (SPIP) and haematoxylin-eosin (H-E) staining. After 12 months of storage, the particle size and zeta potential of FF-NC were 280.43 ± 8.21 nm and -19.64 ± 3.45 mV, and the electron microscopy results showed that FF-NC were nearly circular with no adhesion between particles. In addition, the drug loading, encapsulation efficiency, and dissolution of FF-NC did not change significantly during storage. The inhibition zone of FF-NC against Escherichia coli and Staphylococcus aureus was 21.37 ± 1.70 mm and 25.17 ± 2.47 mm, respectively. Compared with the FF, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of FF-NC are reduced, and the absorption rate constant (Ka) and efficient permeability coefficient (Peff) of FF-NC in the three intestinal segments were increased by 1.28, 0.25, and 9.10 times and 0.59, 0.17, and 6.0 times, respectively. The results of tissue sections showed that FF-NC had little damage to the small intestinal. Nanocrystallisation technology is an effective method to increase the intestinal absorption and antibacterial activity of FF.
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Affiliation(s)
- Yanling Liu
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yuqi Fang
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Yuan Chen
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Weibin Chen
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Ziyu Cheng
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jun Yi
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Xiaofang Li
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
| | - Chongkai Gao
- Guangdong Run Hua Pharmaceutical Co., Ltd., Jieyang, China
| | - Fang Wu
- Guangdong Run Hua Pharmaceutical Co., Ltd., Jieyang, China
| | - Bohong Guo
- Department of Pharmaceutics, School of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, China
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Muscetta M, Portarapillo M, Di Benedetto A, Andreozzi R. Risk analysis of the sodium hypochlorite production process: Focus on the chlorine line. CHEMICAL ENGINEERING JOURNAL ADVANCES 2022. [DOI: 10.1016/j.ceja.2022.100381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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El Mobadder M, Nammour S, Matys J, Grzech-Leśniak K. Sodium Hypochlorite and Diode Laser in Non-Surgical Treatment of Periodontitis: Clinical and Bacteriological Study with Real Time Polymerase Chain Reaction (PCR). Life (Basel) 2022; 12:life12101637. [PMID: 36295072 PMCID: PMC9605566 DOI: 10.3390/life12101637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/04/2022] [Accepted: 10/14/2022] [Indexed: 11/20/2022] Open
Abstract
Increasing the disinfection during non-surgical treatment of periodontitis is primordial. This study assesses the effectiveness of sodium hypochlorite and a 980 nm diode laser in non-surgical treatment of periodontitis. Thirty sites of localized periodontitis with a probing pocket depth (PPD) of ≥ 6 mm were included. Fifteen underwent scaling root planing (SRP group) and 15 underwent SRP + 0.5% NaOCl and a 980 nm diode laser (study group). A biological molecular test and real time polymerase chain reaction (RT-PCR) were performed before (T0) and after intervention (T1). Total bacterial count and counts of Porphyromonas gingivalis, Treponema denticola, Tannerella forsythia, Prevotella intermedia, Peptostreptococcus micros, Fusobacterium nucleatum, Aggregatibacter actinomycetemcomitans, Eubacterium nodatum, Capnocytophaga gingivalis were assessed. Plaque index (PI), bleeding on probing (BOP), gingival recession (GR), PPD and clinical attachment loss (CAL) were evaluated at T0, and 3 and 6 months after. Study group showed a statistically significant reduction of TBC (5.66 × 108 CFU/mL) compared to SRP (6.2 × 109 CFU/mL). Both groups showed a statistically significant reduction of Treponema denticola, Tannerella forsythia, Prevotella intermedia, Peptostrep. (micromonas) micros and Fusobacterium nucleatum; however, a significant reduction of Eubacterium nodatum and Capnocytophaga gingivalis was observed in the study group. At T6, both groups had a statistically significant reduction of PI, BOP, GR, PD and CAL. The study group showed more GR compared to SRP and a significant reduction of PD (4.03 mm ± 0.49) compared to SRP (5.28 mm ± 0.67). This study reveals that NaOCl and a diode laser are effective as an adjunctive to the non-surgical treatment of periodontitis.
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Affiliation(s)
- Marwan El Mobadder
- Dental Surgery Department, Wroclaw Medical University, 50-425 Wroclaw, Poland
- Correspondence: or ; Tel.: +961-71343767
| | - Samir Nammour
- Department of Dental Sciences, Faculty of Medicine, University of Liege, 4000 Liege, Belgium
| | - Jacek Matys
- Dental Surgery Department, Wroclaw Medical University, 50-425 Wroclaw, Poland
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Lu ZC, Tseng CH, Lin HH, Perng YS, Tseng YH. Suggestions on Relieving Physical Anxiety of Medical Workers and Improving Physical and Mental Health Under the COVID-19 Epidemic-A Case Study of Meizhou City. Front Public Health 2022; 10:919049. [PMID: 35784226 PMCID: PMC9247186 DOI: 10.3389/fpubh.2022.919049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 05/16/2022] [Indexed: 11/16/2022] Open
Abstract
The study examined the effects of swimming pools on healthcare professionals' willingness to engage in recreational activities, physical anxiety, and physical and mental well-being in the context of COVID-19. The research adopted the mixed research method, used SPSS 26.0 statistical software to test the reliability of the questionnaire, and then collected 840 valid questionnaires; first analyzed the data with basic statistics, t-test, ANOVA, and PPMCC test methods, and then used the interview method to collect expert opinions. A multi-check approach assembled all data and discussions. The study found that the use of personnel dynamic tracking systems or measures, combined with sodium hypochlorite and repeated filtration to stabilize water quality, could maintain the confidence of most medical workers in the swimming pool sports environment for epidemic prevention and avoid violations. The government could formulate safety prevention and control mechanisms in traffic and establish appropriate traffic routes. Next, formulated a prescription for swimming or other physical activity mechanisms for men aged 31-50 and redesigned measures for medical staff over 51 years old to have tense head issues and physical fatigue, promote blood circulation and improve sleep quality. This will promote the purpose of relieving stress and regulating the physical and mental health of medical staff after engaging in swimming.
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Affiliation(s)
- Zhi-Cheng Lu
- School of Physical Education, Jiaying University, Meizhou, China
| | - Chien-Hsing Tseng
- Department of Recreation and Sport Management, Shu-Te University, Kaohsiung, Taiwan
| | - Hsiao-Hsien Lin
- School of Physical Education, Jiaying University, Meizhou, China
- Department of Leisure Industry Management, National Chin-Yi University of Technology, Taichung, Taiwan
| | - Yuan-Shing Perng
- Department of Forestry, National Chung Hsing University, Taichung, Taiwan
| | - Yi-Han Tseng
- Department of Forestry, National Chung Hsing University, Taichung, Taiwan
- Department of Tourism Leisure and Health Management, Chung Chou University of Science and Technology, Yuanlin City, Taiwan
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Butucel E, Balta I, Ahmadi M, Dumitrescu G, Morariu F, Pet I, Stef L, Corcionivoschi N. Biocides as Biomedicines against Foodborne Pathogenic Bacteria. Biomedicines 2022; 10:biomedicines10020379. [PMID: 35203588 PMCID: PMC8962343 DOI: 10.3390/biomedicines10020379] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 11/16/2022] Open
Abstract
Biocides are currently considered the first line of defense against foodborne pathogens in hospitals or food processing facilities due to the versatility and efficiency of their chemical active ingredients. Understanding the biological mechanisms responsible for their increased efficiency, especially when used against foodborne pathogens on contaminated surfaces and materials, represents an essential first step in the implementation of efficient strategies for disinfection as choosing an unsuitable product can lead to antibiocide resistance or antibiotic–biocide cross-resistance. This review describes these biological mechanisms for the most common foodborne pathogens and focuses mainly on the antipathogen effect, highlighting the latest developments based on in vitro and in vivo studies. We focus on biocides with inhibitory effects against foodborne bacteria (e.g., Escherichia spp., Klebsiella spp., Staphylococcus spp., Listeria spp., Campylobacter spp.), aiming to understand their biological mechanisms of action by looking at the most recent scientific evidence in the field.
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Affiliation(s)
- Eugenia Butucel
- Bacteriology Branch, Veterinary Sciences Division, Agri-Food and Biosciences Institute, Belfast BT4 3SD, UK; (E.B.); (I.B.)
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
| | - Igori Balta
- Bacteriology Branch, Veterinary Sciences Division, Agri-Food and Biosciences Institute, Belfast BT4 3SD, UK; (E.B.); (I.B.)
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
- Faculty of Animal Science and Biotechnologies, University of Agricultural Sciences and Veterinary Medicine, 400372 Cluj-Napoca, Romania
| | - Mirela Ahmadi
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
| | - Gabi Dumitrescu
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
| | - Florica Morariu
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
| | - Ioan Pet
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
| | - Lavinia Stef
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
- Correspondence: (L.S.); (N.C.)
| | - Nicolae Corcionivoschi
- Bacteriology Branch, Veterinary Sciences Division, Agri-Food and Biosciences Institute, Belfast BT4 3SD, UK; (E.B.); (I.B.)
- Faculty of Bioengineering of Animal Resources, Banat University of Animal Sciences and Veterinary Medicine—King Michael I of Romania, 300645 Timisoara, Romania; (M.A.); (G.D.); (F.M.); (I.P.)
- Correspondence: (L.S.); (N.C.)
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Engashev S, Savinkov A, Sadov K, Iliasov P. Effect of colistin sulfate in the health status and bacteriological gut flora in store pigs with nonspecific gastroenteritis. BIO WEB OF CONFERENCES 2022. [DOI: 10.1051/bioconf/20225200039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Piglets with the nonspecific gastroenteritis received Colistin 12000000 with drinking water for 5 days is the doses 0.6 g/100 kg in Group 1 and 0.8 g/100 kg in Group 2. This provided the complete therapeutic efficacy (the clinical recovery) on Day 4 in both treatment groups. The dynamics of the erythrocytes and leukocytes suggested the recovery of the morphofunctional homeostasis after the disease in both treatment groups. After the treatment with the Colistin 12000000, the prevalence of the Streptococcus gallolyticus reduced by 8.3% in the Group 1. Klebsiella pneumoniae prevalence reduced by 33.3%. In Group 2, the prevalence of Streptococcus gallolyticus reduced by 41.7% after the 5-day therapy and was 25.0% at the end of the study. Klebsiella pneumoniae prevalence reduced twice, and it was ultimately observed in 16.7% of cases. Other bacteria presented in the washings at the baseline in both groups were no more observed at the end of the treatment. The symbiotic flora was found in both groups at the end of the experiment in a sufficient number. Thus, the efficient dose of the test drug was 0.6 g/100 kg provided the desirable clinical effect comparable to the higher dosing regimen. The drug well tolerated, with no side effects or adverse events reported throughout the study.
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18
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Murashevych B, Girenko D, Maslak H, Stepanskyi D, Abraimova O, Netronina O, Zhminko P. Acute inhalation toxicity of aerosolized electrochemically generated solution of sodium hypochlorite. Inhal Toxicol 2021; 34:1-13. [PMID: 34915791 DOI: 10.1080/08958378.2021.2013348] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
OBJECTIVE The objective was to determine the inhalation toxicity of the electrochemically generated sodium hypochlorite solution after its single administration to laboratory animals in the form of a highly dispersed aerosol. MATERIALS AND METHODS The study has been conducted according to the OECD Test Guideline №403 'Acute Inhalation Toxicity.' Laboratory animals were exposed to inhalation of an aerosol containing 1.7 ± 0.13 mg/m3 of active chlorine. The hematological and biochemical parameters of the blood of experimental animals have been determined, as well as specific parameters: the activity of cathepsins B and L, catalase, and α1-antitrypsin. Histological study of the lungs of animals has been carried out. RESULTS During inhalation and 14 days after it, no death of the animals was observed; the behavior, appearance, and weight gain did not differ from the control group. There were no significant deviations in hematological parameters, except the decrease in the level of platelets. The biochemical study showed slight changes in the activity of alkaline phosphatase and aspartate aminotransferase on the 1st day after inhalation; these parameters returned to normal within 14 days of observation. Specific biochemical parameters did not show the development of oxidative stress. No specific histological pathologies of lung tissue have been found. CONCLUSIONS Thus, the studied electrochemically generated sodium hypochlorite solution under single inhalation exposure in aerosol form practically does not cause a toxic effect. The data obtained allow classifying such solution to the 4th (or even 5th - after additional studies) class of toxicity in accordance with Globally Harmonized System of Classification and Labeling of Chemicals.
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Affiliation(s)
- Bohdan Murashevych
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, Dnipro, Ukraine
| | - Dmitry Girenko
- Department of Physical Chemistry, Ukrainian State University of Chemical Technology, Dnipro, Ukraine
| | - Hanna Maslak
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, Dnipro, Ukraine
| | - Dmytro Stepanskyi
- Department of Microbiology, Virology, Immunology and Epidemiology, Dnipro State Medical University, Dnipro, Ukraine
| | - Olha Abraimova
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, Dnipro, Ukraine
| | - Olha Netronina
- Department of Biochemistry and Medical Chemistry, Dnipro State Medical University, Dnipro, Ukraine
| | - Petro Zhminko
- Institute of Experimental Toxicology and Medico-Biological Research, L.I. Medved's Research Center of Preventive Toxicology, Food and Chemical Safety, Ministry of Health of Ukraine, Kyiv, Ukraine
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Wu Q, Tao T, Zhao Y, Huang W. A Flexible Chemosensor Based on Colorimetric and Fluorescent Dual Modes for Rapid and Sensitive Detection of Hypochlorite Anion. SENSORS (BASEL, SWITZERLAND) 2021; 21:8082. [PMID: 34884086 PMCID: PMC8659631 DOI: 10.3390/s21238082] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 11/30/2021] [Accepted: 12/01/2021] [Indexed: 01/27/2023]
Abstract
A flexible chemosensor has been developed based on colorimetric and fluorescent dual modes using tetraphenylethylene-centered tetraaniline (TPE4A) for rapid and sensitive detection of hypochlorite anion. The fluorescent probe TPE4A exhibits a unique aggregation-induced emission (AIE) character which is proved by a blue shift of the fluorescent peak from 544 to 474 nm with the water equivalents increasing. With the addition of hypochlorite in solution, the absorbance of the probe changes and the responding fluorescence color can be observed to change from light green to purple. The detection limit of hypochlorite is 1.80 × 10-4 M in solution, and the visual detection limit is 1.27 µg/cm2 with the naked eye for the flexible paper-based chemosensor. The proposed flexible chemosensors show a good selectivity and sensitivity which has great potential for effective detection of hypochlorite anions without any spectroscopic instrumentation.
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Affiliation(s)
- Qin Wu
- Institute of Advanced Materials and Flexible Electronics (IAMFE), School of Chemistry and Materials Science, Nanjing University of Information Science & Technology (NUIST), Nanjing 210044, China; (Q.W.); (Y.Z.)
| | - Tao Tao
- Institute of Advanced Materials and Flexible Electronics (IAMFE), School of Chemistry and Materials Science, Nanjing University of Information Science & Technology (NUIST), Nanjing 210044, China; (Q.W.); (Y.Z.)
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
| | - Yunxia Zhao
- Institute of Advanced Materials and Flexible Electronics (IAMFE), School of Chemistry and Materials Science, Nanjing University of Information Science & Technology (NUIST), Nanjing 210044, China; (Q.W.); (Y.Z.)
| | - Wei Huang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China;
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Brêda Mascarenhas LA, Machado BAS, Rodrigues LDAP, Saraiva Hodel KV, Bandeira Santos AÁ, Freitas Neves PR, da Silva Andrade LPC, Soares MB, de Andrade JB, Badaró R. Potential application of novel technology developed for instant decontamination of personal protective equipment before the doffing step. PLoS One 2021; 16:e0250854. [PMID: 34086691 PMCID: PMC8177472 DOI: 10.1371/journal.pone.0250854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 02/02/2021] [Indexed: 12/14/2022] Open
Abstract
The use of personal protective equipment (PPE) has been considered the most effective way to avoid the contamination of healthcare workers by different microorganisms, including SARS-CoV-2. A spray disinfection technology (chamber) was developed, and its efficacy in instant decontamination of previously contaminated surfaces was evaluated in two exposure times. Seven test microorganisms were prepared and inoculated on the surface of seven types of PPE (respirator mask, face shield, shoe, glove, cap, safety glasses and lab coat). The tests were performed on previously contaminated PPE using a manikin with a motion device for exposure to the chamber with biocidal agent (sodium hypochlorite) for 10 and 30s. In 96.93% of the experimental conditions analyzed, the percentage reduction was >99% (the number of viable cells found on the surface ranged from 4.3x106 to <10 CFU/mL). The samples of E. faecalis collected from the glove showed the lowest percentages reduction, with 86.000 and 86.500% for exposure times of 10 and 30 s, respectively. The log10 reduction values varied between 0.85 log10 (E. faecalis at 30 s in glove surface) and 9.69 log10 (E. coli at 10 and 30 s in lab coat surface). In general, E. coli, S. aureus, C. freundii, P. mirabilis, C. albicans and C. parapsilosis showed susceptibility to the biocidal agent under the tested conditions, with >99% reduction after 10 and 30s, while E. faecalis and P. aeruginosa showed a lower susceptibility. The 30s exposure time was more effective for the inactivation of the tested microorganisms. The results show that the spray disinfection technology has the potential for instant decontamination of PPE, which can contribute to an additional barrier for infection control of healthcare workers in the hospital environment.
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Affiliation(s)
- Luís Alberto Brêda Mascarenhas
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Bruna Aparecida Souza Machado
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
- SENAI CIMATEC, National Service of Industrial Learning–SENAI, Computational Modeling and Industrial Technology, University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Leticia de Alencar Pereira Rodrigues
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Katharine Valéria Saraiva Hodel
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Alex Álisson Bandeira Santos
- SENAI CIMATEC, National Service of Industrial Learning–SENAI, Computational Modeling and Industrial Technology, University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Paulo Roberto Freitas Neves
- SENAI CIMATEC, National Service of Industrial Learning–SENAI, Computational Modeling and Industrial Technology, University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Leone Peter Correia da Silva Andrade
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Milena Botelho Soares
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, Brazil
| | - Jailson Bittencourt de Andrade
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Roberto Badaró
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
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21
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Saharman YR, Karuniawati A, Sedono R, Aditianingsih D, Qi H, Verbrugh HA, Severin JA. Multimodal intervention to reduce acquisition of carbapenem-non-susceptible Gram-negative bacteria in intensive care units in the National Referral Hospital of Indonesia: An interrupted time series study. J Crit Care 2021; 64:237-244. [PMID: 34044188 DOI: 10.1016/j.jcrc.2021.04.016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 04/23/2021] [Accepted: 04/27/2021] [Indexed: 01/23/2023]
Abstract
PURPOSE To evaluate a low-cost multimodal intervention on the acquisition of carbapenem-non-susceptible Acinetobacter baumannii, Klebsiella pneumoniae, and Pseudomonas aeruginosa by patients in low-resource intensive care units. MATERIALS AND METHODS We performed a quasi-experimental study in a referral hospital in Jakarta, Indonesia: pre-intervention phase 1 (2013-2014), intervention phase 2 (2014-2015) and post-intervention phase 3 (2015-2016). The intervention was hand hygiene promotion and environmental cleaning and disinfection combined with patient disinfection and cohorting. The primary outcome was acquisition of resistant bacteria per 100 patient-days at risk, which was assessed by active microbiological surveillance and analysed with a multilevel Poisson segmented regression model. RESULTS In phase 1 (387 patients), the acquisition rate was 4.3/100 days for carbapenem-non-susceptible A. baumannii versus 1.1/100 days for both K. pneumoniae and P. aeruginosa. There was a significant step change from phase 1 to phase 3 (361 patients) in the acquisition of carbapenem-non-susceptible strains, the incidence rate ratio (IRR) was 0.343 (99%CI: 0.164-0.717). This significant change was mainly due to reduced acquisitions of resistant A. baumannii (IRR 0.4, 99%CI: 0.181-1.061). Negative confounding was observed. CONCLUSION A multimodal intervention to prevent acquisition of resistant pathogens is feasible and may be effective in ICUs in lower-middle income countries.
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Affiliation(s)
- Yulia Rosa Saharman
- Department of Clinical Microbiology, Faculty of Medicine, Universitas Indonesia/Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia; Department of Medical Microbiology and Infectious Diseases, Erasmus MC University Medical Center Rotterdam, Rotterdam, the Netherlands
| | - Anis Karuniawati
- Department of Clinical Microbiology, Faculty of Medicine, Universitas Indonesia/Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Rudyanto Sedono
- Critical Care Division, Department of Anesthesia and Intensive Care, Faculty of Medicine, - Universitas Indonesia/Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Dita Aditianingsih
- Critical Care Division, Department of Anesthesia and Intensive Care, Faculty of Medicine, - Universitas Indonesia/Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - Hongchao Qi
- Department of Biostatistics, Erasmus MC University Medical Center Rotterdam, Rotterdam, the Netherlands; Department of Epidemiology, Erasmus MC University Medical Center Rotterdam, Rotterdam, the Netherlands.
| | - Henri A Verbrugh
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC University Medical Center Rotterdam, Rotterdam, the Netherlands.
| | - Juliëtte A Severin
- Department of Medical Microbiology and Infectious Diseases, Erasmus MC University Medical Center Rotterdam, Rotterdam, the Netherlands.
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Adhikari B, Sahu N. COVID-19 into Chemical Science Perspective: Chemical Preventive Measures and Drug Development. ChemistrySelect 2021; 6:2010-2028. [PMID: 33821213 PMCID: PMC8013609 DOI: 10.1002/slct.202100127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Accepted: 02/12/2021] [Indexed: 01/08/2023]
Abstract
COVID-19 facts and literature are discussed into chemical science intuition highlighting the direct role of chemistry to the ongoing global pandemic by covering structural identification of the virus, chemical preventive measures and development of drugs. We reviewed the four most promising repurposed drugs which are presently being investigated in mass clinical trials on COVID-19 infected persons and synthetic routes of these drugs with their recent advancement. Chemical preventive measures such as soap water, hand sanitizer and disinfectant are the only available options in the arsenal to fight against COVID-19, till an effective medicine or vaccine will be made available. As such the present review will focus on the mode of action of the major chemical preventives.
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Affiliation(s)
- Bimalendu Adhikari
- Department of ChemistryNational Institute of Technology Rourkela RourkelaOdisha769008India
| | - Nihar Sahu
- Department of ChemistryNational Institute of Technology Rourkela RourkelaOdisha769008India
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Ghafoor D, Khan Z, Khan A, Ualiyeva D, Zaman N. Excessive use of disinfectants against COVID-19 posing a potential threat to living beings. Curr Res Toxicol 2021; 2:159-168. [PMID: 33688633 PMCID: PMC7931675 DOI: 10.1016/j.crtox.2021.02.008] [Citation(s) in RCA: 48] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/08/2021] [Accepted: 02/26/2021] [Indexed: 02/07/2023] Open
Abstract
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan city of China in late December 2019. The rapid spread of the COVID-19 across the communities shock the entire population, because of no existing therapies. Health professionals recommended frequent washing of hands with soap and alcohol-based sanitizers, but these disinfectants has worst effects on human health. Precautionary measures should be ensured to protect ourselves and the community from the possible risk associated with disinfectants.
The severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) emerged in Wuhan city of China in late December 2019 and identified as a novel coronavirus disease 2019 (COVID-19). On January 30, the World Health Organization (WHO) declared the coronavirus outbreak a global public health emergency. The rapid spread of the pathogen across the communities shock the entire population. As no existing therapy were available during the pandemic. Health professionals recommended frequent washing of hands with soap and alcohol-based sanitizers. Disinfectants were extensively sprayed to minimize the possibility of getting COVID-19. Despite the potential benefits of these germicidal agents against COVID-19. Alcohol-based hand sanitizers lead to dry skin, infection, and alcohol poisoning. Children are considered more prone to alcohol poisoning and other major health concern. Precautionary measures should be ensured to protect the community from the possible risk associated with disinfectants.
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Affiliation(s)
- Dawood Ghafoor
- CAS Key Laboratory of Special Pathogens, Wuhan Institute of Virology, Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan, Hubei, China.,University of Chinese Academy of Sciences, Beijing 100049, China.,Center for Biotechnology and Microbiology, University of Swat, Pakistan
| | - Zafran Khan
- University of Chinese Academy of Sciences, Beijing 100049, China.,State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Guangzhou 510530, China.,Center for Biotechnology and Microbiology, University of Swat, Pakistan
| | - Asaf Khan
- Ministry of Education, Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, 730000 Gansu, China
| | - Daniya Ualiyeva
- University of Chinese Academy of Sciences, Beijing 100049, China.,Department of Herpetology, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
| | - Nasib Zaman
- Center for Biotechnology and Microbiology, University of Swat, Pakistan
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Castro VS, Mutz YDS, Rosario DKA, Cunha-Neto A, Figueiredo EEDS, Conte-Junior CA. Inactivation of Multi-Drug Resistant Non-Typhoidal Salmonella and Wild-Type Escherichia coli STEC Using Organic Acids: A Potential Alternative to the Food Industry. Pathogens 2020; 9:E849. [PMID: 33081230 PMCID: PMC7602699 DOI: 10.3390/pathogens9100849] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/06/2020] [Accepted: 09/23/2020] [Indexed: 11/17/2022] Open
Abstract
Salmonella and Escherichia coli are the main bacterial species involved in food outbreaks worldwide. Recent reports showed that chemical sanitizers commonly used to control these pathogens could induce antibiotic resistance. Therefore, this study aimed to describe the efficiency of chemical sanitizers and organic acids when inactivating wild and clinical strains of Salmonella and E. coli, targeting a 4-log reduction. To achieve this goal, three methods were applied. (i) Disk-diffusion challenge for organic acids. (ii) Determination of MIC for two acids (acetic and lactic), as well as two sanitizers (quaternary compound and sodium hypochlorite). (iii) The development of inactivation models from the previously defined concentrations. In disk-diffusion, the results indicated that wild strains have higher resistance potential when compared to clinical strains. Regarding the models, quaternary ammonium and lactic acid showed a linear pattern of inactivation, while sodium hypochlorite had a linear pattern with tail dispersion, and acetic acid has Weibull dispersion to E. coli. The concentration to 4-log reduction differed from Salmonella and E. coli in acetic acid and sodium hypochlorite. The use of organic acids is an alternative method for antimicrobial control. Our study indicates the levels of organic acids and sanitizers to be used in the inactivation of emerging foodborne pathogens.
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Affiliation(s)
- Vinicius Silva Castro
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (V.S.C.); (Y.d.S.M.); (D.K.A.R.)
- Faculdade de Agronomia e Zootecnia, Universidade Federal de Mato Grosso, Mato Grosso 78060-900, Brazil;
- Faculdade de Nutrição, Universidade Federal de Mato Grosso, Mato Grosso 78060-900, Brazil;
- Departamento de Tecnologia de Alimentos, Faculdade de Veterinária, Universidade Federal Fluminense, Rio de Janeiro 24230-340, Brazil
| | - Yhan da Silva Mutz
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (V.S.C.); (Y.d.S.M.); (D.K.A.R.)
- Departamento de Tecnologia de Alimentos, Faculdade de Veterinária, Universidade Federal Fluminense, Rio de Janeiro 24230-340, Brazil
| | - Denes Kaic Alves Rosario
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (V.S.C.); (Y.d.S.M.); (D.K.A.R.)
- Departamento de Tecnologia de Alimentos, Faculdade de Veterinária, Universidade Federal Fluminense, Rio de Janeiro 24230-340, Brazil
| | - Adelino Cunha-Neto
- Faculdade de Nutrição, Universidade Federal de Mato Grosso, Mato Grosso 78060-900, Brazil;
| | - Eduardo Eustáquio de Souza Figueiredo
- Faculdade de Agronomia e Zootecnia, Universidade Federal de Mato Grosso, Mato Grosso 78060-900, Brazil;
- Faculdade de Nutrição, Universidade Federal de Mato Grosso, Mato Grosso 78060-900, Brazil;
| | - Carlos Adam Conte-Junior
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-909, Brazil; (V.S.C.); (Y.d.S.M.); (D.K.A.R.)
- Departamento de Tecnologia de Alimentos, Faculdade de Veterinária, Universidade Federal Fluminense, Rio de Janeiro 24230-340, Brazil
- Instituto Nacional de Controle de Qualidade em Saúde, Fundação Oswaldo Cruz, Rio de Janeiro, Rio de Janeiro 21040-900, Brazil
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Xu J, Gao Y, Meng Y, Wu W, Tsauo C, Guo T, Cao Y, Huang D, Zhou X, He J. Mechano-chemical coupling of irrigation enhances endodontic biofilm debridement. BIOFOULING 2020; 36:792-799. [PMID: 32873073 DOI: 10.1080/08927014.2020.1814753] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Jialei Xu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yuan Gao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Yajun Meng
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Department of VIP Dental Care, Stomatology Hospital of Xi’an Jiaotong University, Xi’an, China
| | - Weiwei Wu
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chialing Tsauo
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Tingwei Guo
- Center for Craniofacial Molecular Biology, Herman Ostrow School of Dentistry, University of Southern California, Los Angeles, CA, USA
| | - Yangpei Cao
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Dingming Huang
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jinzhi He
- State Key Laboratory of Oral Diseases & National Clinical Research Center for Oral Diseases & Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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Wijesooriya LI, Waidyathilake D. Antimicrobial Properties of Nonantibiotic Agents for Effective Treatment of Localized Wound Infections: A Minireview. INT J LOW EXTR WOUND 2020; 21:207-218. [PMID: 32746677 DOI: 10.1177/1534734620939748] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Wounds present serious health problems in humans and animals. Importantly, if left untreated, wounds invariably lead to long-term morbidity. The inappropriate use and costs of antibiotics place significant challenges globally and affect the health budgets of many countries. Though some antibiotics are administered systemically, treatment of localized infections, in particular, chronic wound infections, does not need such therapy-this would minimize development of antibiotic resistance. Of these measures, nanoparticles of silver, ZnO, and gold seem to give promising results against common wound pathogens while having few limitations. Chemical components of essential oils, which are extracted from different plants, have been shown to act against common wound pathogens. Plant extracts have shown different mechanisms in biofilm elimination. Chlorhexidine and chlorine derivatives act as wound antiseptics. Attempts with biological agents such as maggots have also been shown to provide anti-infective as well as mechanical removal of wound debris. Honey, including those obtained from bees, has a wide coverage against wound pathogens. Glycerin and hypertonic saline are anti-infective through the concentration-dependent killing of pathogens. Hyperbaric oxygen acts against many wound pathogens, in particular anaerobes. This review is focused on nonantibiotic attempts for the cure of localized infections, in particular, chronic wounds with common wound pathogens.
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Speck S, Wenke C, Feßler AT, Kacza J, Geber F, Scholtzek AD, Hanke D, Eichhorn I, Schwarz S, Rosolowski M, Truyen U. Borderline resistance to oxacillin in Staphylococcus aureus after treatment with sub-lethal sodium hypochlorite concentrations. Heliyon 2020; 6:e04070. [PMID: 32613099 PMCID: PMC7317233 DOI: 10.1016/j.heliyon.2020.e04070] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/21/2020] [Accepted: 05/21/2020] [Indexed: 11/30/2022] Open
Abstract
Surface disinfectants are regularly used in prophylactic and infection control measures. Concern has been raised whether residues of sub-inhibitory disinfectant concentrations may constitute a selective pressure and could contribute to the development of strains which are tolerant and/or resistant to biocides including antibiotics. The current study investigated whether Staphylococcus (S.) aureus ATCC® 29213™ and ATCC® 6538™ would change their growth characteristics and antimicrobial susceptibility profiles after prolonged treatment with sub-inhibitory concentrations of sodium hypochlorite (NaOCl). NaOCl is a fast-acting disinfectant with a broad-spectrum activity, inexpensive and widely used in healthcare and the food production industry. Minimum inhibitory concentration (MIC) for NaOCl was determined by broth macrodilution according to the guidelines for disinfectant efficacy testing provided by the German Veterinary Medical Society. Serial passages after 24 h and 72 h, respectively, in defined sub-inhibitory concentrations of NaOCl resulted in a number of phenotypic variants. Two of these variants, derived from S. aureus ATCC® 29213™, showed elevated MICs of oxacillin and were considered as in vitro-generated borderline oxacillin-resistant S. aureus (BORSA). Transmission electron microscopy revealed a significantly thickened cell wall in these isolates, a phenomenon that has also been described for Listeria monocytogenes after low-level exposure to NaOCl. Whole genome sequencing revealed an early stop codon in the gene coding for the GdpP protein and thereby abolishing the function of this gene. GdpP represents a phosphodiesterase that regulates gene expression, and loss of function of the GdpP protein has been described in association with borderline oxacillin resistance. Our findings suggest that a mutation in the GdpP protein gene and morphological changes of the cell wall were induced by repeated exposure to sub-lethal NaOCl concentrations, and most likely accounted for a BORSA phenotype in two variants derived from S. aureus ATCC® 29213™.
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Affiliation(s)
- Stephanie Speck
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, Leipzig, Germany
- Corresponding author.
| | - Cindy Wenke
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, Leipzig, Germany
| | - Andrea T. Feßler
- Institute of Microbiology and Epizootics, Centre of Infection Medicine, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Johannes Kacza
- BioImaging Core Facility, VMF/SIKT, University of Leipzig, Leipzig, Germany
| | - Franziska Geber
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, Leipzig, Germany
| | - Anissa D. Scholtzek
- Institute of Microbiology and Epizootics, Centre of Infection Medicine, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Dennis Hanke
- Institute of Microbiology and Epizootics, Centre of Infection Medicine, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Inga Eichhorn
- Institute of Microbiology and Epizootics, Centre of Infection Medicine, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Stefan Schwarz
- Institute of Microbiology and Epizootics, Centre of Infection Medicine, Department of Veterinary Medicine, Freie Universität Berlin, Berlin, Germany
| | - Maciej Rosolowski
- Institute for Medical Informatics, Statistics and Epidemiology (IMISE), University of Leipzig, Leipzig, Germany
| | - Uwe Truyen
- Institute of Animal Hygiene and Veterinary Public Health, University of Leipzig, Leipzig, Germany
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Li G, Xia X, Zhao S, Shi M, Liu F, Zhu Y. The physiological and toxicological effects of antibiotics on an interspecies insect model. CHEMOSPHERE 2020; 248:126019. [PMID: 32007775 DOI: 10.1016/j.chemosphere.2020.126019] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 06/10/2023]
Abstract
Silkworm (Bombyx mori L.) has a clear genetic background, parts of which are highly homologous to certain genes related to human hereditary diseases. Thus, the species presents an excellent interspecies model for drug screening and microbe-host interaction studies. Chloramphenicol (CAM) and vancomycin (VCM) are antibiotics commonly used to treat specific bacterial infections in medical care, animal husbandry, and agriculture. However, inappropriate dosages and prolonged therapy increase their risk of toxicity. In this work, we investigated the physiological and toxicological responses of silkworm to combined oral administration of CAM and VCM. Results showed that antibiotics promote the feeding behavior of silkworm and significantly reduce (P < 0.05) intestinal cultivable bacterial counts. Moreover, antibiotics decreased the antioxidant enzyme activities of superoxide dismutase, catalase, glutathione S-transferase, and thioredoxin reductase and caused oxidative damage to the silkworm intestine; the degree of damage was confirmed by histopathology analysis. The gene expression levels of antimicrobial peptides (attacin, lysozyme, and cecropins) were also perturbed by antibiotics. After antibiotic exposure, 16S rRNA metagenomic sequencing revealed increases in the relative abundance of Sphingobium, Burkholderia, Barnesiella, Bacteroides, Bradyrhizobium, Acinetobacter, Phenylobacterium, Plesiomonas, Escherichia/Shigella, and unclassified bacteria, as well as a reduction of Enterococcus. The metabolic and functional profiles of intestinal microbiota, particularly metabolic processes, such as energy, cofactors and vitamins, lipid, amino acid, and carbohydrate metabolisms, changed after antibiotic exposure. In conclusion, our findings reveal that antibiotics exert substantial effects on silkworm. The present study may promote the applications of silkworm as an interspecies model in the medical and pharmaceutical fields.
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Affiliation(s)
- Guannan Li
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400716, China.
| | - Xuejuan Xia
- Food Science and Technology Programme, Department of Chemistry, National University of Singapore, Singapore, 117546, Singapore
| | - Shan Zhao
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400716, China
| | - Min Shi
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400716, China
| | - Fengdan Liu
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400716, China
| | - Yong Zhu
- State Key Laboratory of Silkworm Genome Biology, College of Biotechnology, Southwest University, Chongqing, 400716, China.
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Gomes IB, Simões LC, Simões M. Influence of surface copper content on Stenotrophomonas maltophilia biofilm control using chlorine and mechanical stress. BIOFOULING 2020; 36:1-13. [PMID: 31997661 DOI: 10.1080/08927014.2019.1708334] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 12/18/2019] [Accepted: 12/18/2019] [Indexed: 06/10/2023]
Abstract
This work aimed to evaluate the action of materials with different copper content (0, 57, 96 and 100%) on biofilm formation and control by chlorination and mechanical stress. Stenotrophomonas maltophilia isolated from drinking water was used as a model microorganism and biofilms were developed in a rotating cylinder reactor using realism-based shear stress conditions. Biofilms were characterized phenotypically and exposed to three control strategies: 10 mg l-1 of free chlorine for 10 min, an increased shear stress (a fluid velocity of 1.5 m s-1 for 30s), and a combination of both treatments. These shock treatments were not effective in biofilm control. The benefits from the use of copper surfaces was found essentially in reducing the numbers of non-damaged cells. Copper materials demonstrated better performance in biofilm prevention than chlorine. In general, copper alloys may have a positive public health impact by reducing the number of non-damaged cells in the water delivered after chlorine exposure.
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Affiliation(s)
- I B Gomes
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
| | - L C Simões
- CEB-Centre of Biological Engineering, University of Minho, Braga, Portugal
| | - M Simões
- LEPABE, Department of Chemical Engineering, Faculty of Engineering, University of Porto, Porto, Portugal
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Köhler AT, Rodloff AC, Labahn M, Reinhardt M, Truyen U, Speck S. Evaluation of disinfectant efficacy against multidrug-resistant bacteria: A comprehensive analysis of different methods. Am J Infect Control 2019; 47:1181-1187. [PMID: 31060869 DOI: 10.1016/j.ajic.2019.04.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 04/01/2019] [Accepted: 04/01/2019] [Indexed: 12/28/2022]
Abstract
BACKGROUND Multidrug-resistant gram-negative bacteria (MDR-GNB) constitute a threat to health care worldwide. Disinfectants are used to prevent and control the spread of MDR-GNB in a hospital setting but their efficacy might be impaired by bacterial mechanisms that may act on both antimicrobials and disinfectants. Determination of minimum inhibitory concentrations is mainly used to determine bacterial susceptibility against disinfectants, but practical tests on surfaces might be more suitable to predict in-use conditions. Our objective was to compare and evaluate 4 different methods widely used to assess surface disinfectant efficacy. METHODS The efficacy of benzalkonium chloride (BAC), peracetic acid (PAA), and ethanol (ETH) against multidrug-resistant Acinetobacter, Pseudomonas, and Klebsiella strains was assessed by minimum inhibitory concentration determinations, quantitative suspension tests, qualitative suspension tests, and carrier tests. Test results were compared to ascertain the most appropriate method. RESULTS ETH, PAA, and BAC were highly effective against MDR-GNB, but we observed marked differences in efficacious concentrations (up to 100-fold) as a function of the test method applied. Minimum inhibitory concentration determination was not reliable for evaluating susceptibility or resistance to BAC. CONCLUSIONS Surface tests should be used to determine bacterial susceptibility against disinfectants. Moreover, suitable guidelines are needed that allow for the standardization and comparison of bactericidal values obtained by different investigators.
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