1
|
Petala M, Kostoglou M, Karapantsios T, Dovas CI, Lytras T, Paraskevis D, Roilides E, Koutsolioutsou-Benaki A, Panagiotakopoulos G, Sypsa V, Metallidis S, Papa A, Stylianidis E, Papadopoulos A, Tsiodras S, Papaioannou N. Relating SARS-CoV-2 shedding rate in wastewater to daily positive tests data: A consistent model based approach. Sci Total Environ 2022; 807:150838. [PMID: 34627900 PMCID: PMC8497956 DOI: 10.1016/j.scitotenv.2021.150838] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/15/2021] [Accepted: 10/02/2021] [Indexed: 05/13/2023]
Abstract
During the COVID-19 pandemic, wastewater-based epidemiology (WBE) has been engaged to complement medical surveillance and in some cases to also act as an early diagnosis indicator of viral spreading in the community. Most efforts worldwide by the scientific community and commercial companies focus on the formulation of protocols for SARS-CoV-2 analysis in wastewater and approaches addressing the quantitative relationship between WBE and medical surveillance are lacking. In the present study, a mathematical model is developed which uses as input the number of daily positive medical tests together with the highly non-linear shedding rate curve of individuals to estimate the evolution of global virus shedding rate in wastewater along calendar days. A comprehensive parametric study by the model using as input actual medical surveillance and WBE data for the city of Thessaloniki (~700,000 inhabitants, North Greece) during the outbreak of November 2020 reveals the conditions under which WBE can be used as an early warning tool for predicting pandemic outbreaks. It is shown that early warning capacity is different along the days of an outbreak and depends strongly on the number of days apart between the day of maximum shedding rate of infected individuals in their disease cycle and the day of their medical testing. The present data indicate for Thessaloniki an average early warning capacity of around 2 days. Moreover, the data imply that there exists a proportion between unreported cases (asymptomatic persons with mild symptoms that do not seek medical advice) and reported cases. The proportion increases with the number of reported cases. The early detection capacity of WBE improves substantially in the presence of an increasing number of unreported cases. For Thessaloniki at the peak of the pandemic in mid-November 2020, the number of unreported cases reached a maximum around 4 times the number of reported cases.
Collapse
Affiliation(s)
- M Petala
- Laboratory of Environmental Engineering & Planning, Department of Civil Engineering, Aristotle University of Thessaloniki, Thessaloniki 54 124, Greece
| | - M Kostoglou
- Laboratory of Chemical and Environmental Technology, Dept. of Chemistry, Aristotle University of Thessaloniki, 54 124, Thessaloniki 54124, Greece
| | - Th Karapantsios
- Laboratory of Chemical and Environmental Technology, Dept. of Chemistry, Aristotle University of Thessaloniki, 54 124, Thessaloniki 54124, Greece.
| | - C I Dovas
- Faculty of Veterinary Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Th Lytras
- National Public Health Organization, Athens, Greece; European University Cyprus, Nicosia, Cyprus
| | - D Paraskevis
- National and Kapodistrian University of Athens, Athens, Greece
| | - E Roilides
- Infectious Diseases Unit and 3rd Department of Pediatrics, Aristotle University School of Health Sciences, Hippokration Hospital, Thessaloniki 54642, Greece
| | - A Koutsolioutsou-Benaki
- Department of Environmental Health, Directory of Epidemiology and Prevention of Non Communicable Diseases and Injuries, National Public Health Organization, Athens, Greece
| | | | - V Sypsa
- National and Kapodistrian University of Athens, Athens, Greece
| | - S Metallidis
- Department of Haematology, First Department of Internal Medicine, Faculty of Medicine, AHEPA General Hospital, Aristotle University of Thessaloniki, Thessaloniki 54636, Greece
| | - A Papa
- Department of Microbiology, Medical School, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - E Stylianidis
- School of Spatial Planning and Development, Faculty of Engineering, Aristotle University of Thessaloniki, 54124, Greece
| | - A Papadopoulos
- EYATH S.A., Thessaloniki Water Supply and Sewerage Company S.A., Thessaloniki 54636, Greece
| | - S Tsiodras
- National and Kapodistrian University of Athens, Athens, Greece
| | - N Papaioannou
- Faculty of Veterinary Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| |
Collapse
|
2
|
Sud A, Tacchi S, Sagkovits D, Barton C, Sall M, Diez LH, Stylianidis E, Smith N, Wright L, Zhang S, Zhang X, Ravelosona D, Carlotti G, Kurebayashi H, Kazakova O, Cubukcu M. Tailoring interfacial effect in multilayers with Dzyaloshinskii-Moriya interaction by helium ion irradiation. Sci Rep 2021; 11:23626. [PMID: 34880294 PMCID: PMC8654828 DOI: 10.1038/s41598-021-02902-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2021] [Accepted: 11/23/2021] [Indexed: 11/13/2022] Open
Abstract
We show a method to control magnetic interfacial effects in multilayers with Dzyaloshinskii-Moriya interaction (DMI) using helium (He[Formula: see text]) ion irradiation. We report results from SQUID magnetometry, ferromagnetic resonance as well as Brillouin light scattering results on multilayers with DMI as a function of irradiation fluence to study the effect of irradiation on the magnetic properties of the multilayers. Our results show clear evidence of the He[Formula: see text] irradiation effects on the magnetic properties which is consistent with interface modification due to the effects of the He[Formula: see text] irradiation. This external degree of freedom offers promising perspectives to further improve the control of magnetic skyrmions in multilayers, that could push them towards integration in future technologies.
Collapse
Affiliation(s)
- A. Sud
- grid.83440.3b0000000121901201London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London, WC1H 0AH UK
| | - S. Tacchi
- grid.9027.c0000 0004 1757 3630Istituto Officina dei Materiali del CNR (CNR-IOM), Sede Secondaria di Perugia, c/o Dipartimento di Fisica e Geologia, Università di Perugia, 06123 Perugia, Italy
| | - D. Sagkovits
- grid.83440.3b0000000121901201London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London, WC1H 0AH UK ,grid.410351.20000 0000 8991 6349National Physical Laboratory, Hampton Road, Teddington, TW11 0LW UK
| | - C. Barton
- grid.410351.20000 0000 8991 6349National Physical Laboratory, Hampton Road, Teddington, TW11 0LW UK
| | - M. Sall
- Spin-Ion Technologies, Palaiseau, France
| | - L. H. Diez
- grid.503099.6Centre de Nanosciences et de Nanotechnologies, Orsay, l̂le-de-France France
| | - E. Stylianidis
- grid.83440.3b0000000121901201London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London, WC1H 0AH UK
| | - N. Smith
- grid.410351.20000 0000 8991 6349National Physical Laboratory, Hampton Road, Teddington, TW11 0LW UK
| | - L. Wright
- grid.410351.20000 0000 8991 6349National Physical Laboratory, Hampton Road, Teddington, TW11 0LW UK
| | - S. Zhang
- grid.45672.320000 0001 1926 5090King Abdullah University of Science and Technology Physical Sciences and Engineering Division, Thuwal, Mecca, Saudi Arabia
| | - X. Zhang
- grid.45672.320000 0001 1926 5090King Abdullah University of Science and Technology Physical Sciences and Engineering Division, Thuwal, Mecca, Saudi Arabia
| | - D. Ravelosona
- Spin-Ion Technologies, Palaiseau, France ,grid.503099.6Centre de Nanosciences et de Nanotechnologies, Orsay, l̂le-de-France France
| | - G. Carlotti
- grid.9027.c0000 0004 1757 3630Dipartimento di Fisica e Geologia, Università di Perugia, Via Pascoli, 06123 Perugia, Italy
| | - H. Kurebayashi
- grid.83440.3b0000000121901201London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London, WC1H 0AH UK
| | - O. Kazakova
- grid.410351.20000 0000 8991 6349National Physical Laboratory, Hampton Road, Teddington, TW11 0LW UK
| | - M. Cubukcu
- grid.83440.3b0000000121901201London Centre for Nanotechnology, University College London, 17-19 Gordon Street, London, WC1H 0AH UK ,grid.410351.20000 0000 8991 6349National Physical Laboratory, Hampton Road, Teddington, TW11 0LW UK
| |
Collapse
|
3
|
Cuerda C, Muscaritoli M, Krznaric Z, Pirlich M, Van Gossum A, Schneider S, Ellegard L, Fukushima R, Chourdakis M, Della Rocca C, Milovanovic D, Lember M, Arias-Diaz J, Stylianidis E, Anastasiadis K, Alunni V, Mars T, Hellerman MI, Kujundžić-Tiljak M, Irtun O, Abbasoglu O, Barazzoni R. Nutrition education in medical schools (NEMS) project: Joining ESPEN and university point of view. Clin Nutr 2021; 40:2754-2761. [PMID: 33933741 DOI: 10.1016/j.clnu.2021.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/07/2021] [Accepted: 03/08/2021] [Indexed: 12/31/2022]
Abstract
BACKGROUND & AIMS Nutrition education is not well represented in the medical curriculum. The aim of this original paper was to describe the Nutrition Education in Medical Schools (NEMS) Project of the European Society for Clinical Nutrition and Metabolism (ESPEN). METHODS On 19 January 2020, a meeting was held on this topic that was attended by 51 delegates (27 council members) from 34 countries, and 13 European University representatives. RESULTS This article includes the contents of the meeting that concluded with the signing of the Manifesto for the Implementation of Nutrition Education in the Undergraduate Medical Curriculum. CONCLUSION The meeting represented a significant step forward, moved towards implementation of nutrition education in medical education in general and in clinical practice in particular, in compliance with the aims of the ESPEN Nutrition Education Study Group (NESG).
Collapse
Affiliation(s)
- C Cuerda
- Nutrition Unit. Hospital General Universitario Gregorio Marañón. Instituto de Investigación Sanitaria Gregorio Marañón, Madrid, Spain.
| | - M Muscaritoli
- Department of Translational and Precision Medicine, Sapienza University of Rome, Italy
| | - Z Krznaric
- Department of Gastroenterology, Hepatology and Nutrition, University Hospital Centre Zagreb, University of Zagreb, Croatia
| | - M Pirlich
- Imperial Oak Outpatient Clinic, Endocrinology, Gastroenterology & Clinical Nutrition, Berlin, Germany
| | - A Van Gossum
- Department of Gastroenterology and Nutritional Support, Hopital Erasme and Institut Bordet, Free University of Brussels, Brussels, Belgium
| | - S Schneider
- Department of Gastroenterology and Nutrition, CHU de Nice, Université Côte D'Azur, Nice, France
| | - L Ellegard
- Sahlgrenska Academy at the University of Gothenborg, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - R Fukushima
- Department of Surgery, Teikyo University School of Medicine, Japan
| | - M Chourdakis
- Laboratory of Hygiene, Social & Preventive Medicine and Medical Statistics, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, Greece
| | - C Della Rocca
- Dean of the Faculty of Pharmacy and Medicine, Sapienza University of Rome, Italy
| | - D Milovanovic
- Department of Pharmacology and Toxicology, Faculty of Medical Sciences University of Kragujevac, Kragujevac, Serbia
| | - M Lember
- Dean of the Faculty of Medicine, University of Tartu, Estonia
| | - J Arias-Diaz
- Dean of the Faculty of Medicine, Complutense University, Madrid, Spain
| | - E Stylianidis
- Vice Rector for Research and Lifelong Education, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - K Anastasiadis
- Dean of the School of Medicine, Aristotle University of Thessaloniki, Greece
| | - V Alunni
- Vice Dean of the Faculty of Medicine for Education, Université Côte D'Azur, Nice, France
| | - T Mars
- Vice Dean Erasmus LLP Coordinator, Faculty of Medicine, University of Ljubljana, Ljubljana, Slovenia
| | - M I Hellerman
- Department of General Intensive Care, Institute for Nutrition Research, Rabin Medical Center, Beilinson Hospital, Petah Tikva 49100, Israel
| | - M Kujundžić-Tiljak
- Andrija Stampar School of Public Health, School of Medicine, University of Zagreb, Croatia
| | - O Irtun
- Gastrosurgical Research Group, Department of Clinical Medicine, UiT the Arctic University of Norway, Tromsø, Norway
| | - O Abbasoglu
- Department of Surgery, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - R Barazzoni
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | | |
Collapse
|
4
|
Petala M, Dafou D, Kostoglou M, Karapantsios T, Kanata E, Chatziefstathiou A, Sakaveli F, Kotoulas K, Arsenakis M, Roilides E, Sklaviadis T, Metallidis S, Papa A, Stylianidis E, Papadopoulos A, Papaioannou N. A physicochemical model for rationalizing SARS-CoV-2 concentration in sewage. Case study: The city of Thessaloniki in Greece. Sci Total Environ 2021; 755:142855. [PMID: 33199018 PMCID: PMC7550162 DOI: 10.1016/j.scitotenv.2020.142855] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 09/06/2020] [Accepted: 10/02/2020] [Indexed: 05/17/2023]
Abstract
Detection of SARS-CoV-2 in sewage has been employed by several researchers as an alternative early warning indicator of virus spreading in communities, covering both symptomatic and asymptomatic cases. A factor that can seriously mislead the quantitative measurement of viral copies in sewage is the adsorption of virus fragments onto the highly porous solids suspended in wastewater, making them inaccessible. This depends not only on the available amount of suspended solids, but also on the amount of other dissolved chemicals which may influence the capacity of adsorption. On this account, the present work develops a mathematical framework, at various degrees of spatial complexity, of a physicochemical model that rationalizes the quantitative measurements of total virus fragments in sewage as regards the adsorption of virus onto suspended solids and the effect of dissolved chemicals on it. The city of Thessaloniki in Greece is employed as a convenient case study to determine the values of model variables. The present data indicate the ratio of the specific absorption (UV254/DOC) over the dissolved oxygen (DO) as the parameter with the highest correlation with viral copies. This implies a strong effect on viral inaccessibility in sewage caused (i) by the presence of humic-like substances and (ii) by virus decay due to oxidation and metabolic activity of bacteria. The present results suggest days where many fold corrections in the measurement of viral copies should be applied. As a result, although the detected RNA load in June 2020 is similar to that in April 2020, virus shedding in the city is about 5 times lower in June than in April, in line with the very low SARS-CoV-2 incidence and hospital admissions for COVID-19 in Thessaloniki in June.
Collapse
Affiliation(s)
- M Petala
- Laboratory of Environmental Engineering & Planning, Department of Civil Engineering, Aristotle University of Thessaloniki, Thessaloniki 54 124, Greece
| | - D Dafou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - M Kostoglou
- Laboratory of Chemical and Environmental Technology, Dept. of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - Th Karapantsios
- Laboratory of Chemical and Environmental Technology, Dept. of Chemistry, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece.
| | - E Kanata
- Prion Diseases Research Group, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - A Chatziefstathiou
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - F Sakaveli
- Laboratory of Environmental Engineering & Planning, Department of Civil Engineering, Aristotle University of Thessaloniki, Thessaloniki 54 124, Greece
| | - K Kotoulas
- EYATH S.A., Thessaloniki Water Supply and Sewerage Company S.A., Thessaloniki, 54636, Greece
| | - M Arsenakis
- Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - E Roilides
- Infectious Diseases Unit, 3rd Department of Pediatrics, Faculty of Medicine, Aristotle University School of Health Sciences, Hippokration General Hospital, Thessaloniki 54642, Greece
| | - T Sklaviadis
- Prion Diseases Research Group, School of Pharmacy, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - S Metallidis
- Department of Haematology, First Department of Internal Medicine, Faculty of Medicine, AHEPA General Hospital, Aristotle University of Thessaloniki, Thessaloniki 54636, Greece
| | - A Papa
- Department of Microbiology, Medical School, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| | - E Stylianidis
- School of Spatial Planning and Development, Faculty of Engineering, Aristotle University of Thessaloniki, 54124, Greece
| | - A Papadopoulos
- EYATH S.A., Thessaloniki Water Supply and Sewerage Company S.A., Thessaloniki, 54636, Greece
| | - N Papaioannou
- Faculty of Veterinary Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
| |
Collapse
|
5
|
Grivas TB, Patias P, Soultanis K, Stylianidis E, Tsioukas V, Georgiadis C, Andreou C, Charalambous P, Chrysanthou Y. Design, implementation and first results of a 3RD generation digital photogrammetric system from trunk surface assessment and scoliosis screening. Scoliosis 2012. [PMCID: PMC3304850 DOI: 10.1186/1748-7161-7-s1-p14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- TB Grivas
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - P Patias
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - K Soultanis
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - E Stylianidis
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - V Tsioukas
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - C Georgiadis
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - C Andreou
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - P Charalambous
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| | - Y Chrysanthou
- “Tzanio” General Hospital of Piraeus, Pirae Brilissia, Greece
| |
Collapse
|