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Hernández-Ledesma A, Cabrera-Díaz E, Arvizu-Medrano SM, Gómez-Baltazar A, Hernández-Iturriaga M, Godínez-Oviedo A. Virulence and antimicrobial resistance profiles of Salmonella enterica isolated from foods, humans, and the environment in Mexico. Int J Food Microbiol 2023; 391-393:110135. [PMID: 36827747 DOI: 10.1016/j.ijfoodmicro.2023.110135] [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: 11/03/2022] [Revised: 01/11/2023] [Accepted: 02/09/2023] [Indexed: 02/21/2023]
Abstract
Salmonella enterica genotypic and phenotypic characteristics play an important role in its pathogenesis, which could be influenced by its origin. This study evaluated the association among the antimicrobial resistance, virulence, and origin of circulating S. enterica strains in Mexico, isolated from foods, humans, and the environment. The antimicrobial susceptibility to fourteen antibiotics by the Kirby-Bauer method (n = 117), and the presence of thirteen virulence genes by multiplex PCR (n = 153) and by sequence alignments (n = 2963) were evaluated. In addition, a set of S. enterica isolates from Mexico (n = 344) previously characterized according to their genotypic and phenotypic print was included to increase the coverage of the association analysis. Strains with the presence of sopE and strains with the absence of sspH1 were significantly associated with multidrug-resistant (MDR) phenotypes (p < 0.05). The origin of the strains had significant associations with the antimicrobial profiles and some virulence genes (hilA, orgA, sifA, ssaQ, sseL, sspH1, pefA, and spvC) (p < 0.05). Animal-origin food isolates showed the highest frequency of MDR (57.2 %), followed by human isolates (30.0 %). Also, sspH1, pefA, and spvC were found in major frequency in human (32.4 %, 31.0 %, 31.7 %) and animal-origin foods (41.6 %, 10.6 %, 10.6 %) isolates. The findings highlighted that antimicrobial profiles and specific virulence genes of S. enterica strains are related to their origin. Similar genotypic and phenotypic characteristics between human and animal-origin foods isolates were found, suggesting that animal-origin foods isolates are the most responsible for human cases. The revealed associations can be used to improve risk estimation assessments in national food safety surveillance programs.
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Affiliation(s)
- A Hernández-Ledesma
- Departamento de Investigación y Posgrado de Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Col. Las Campanas, 76010 Querétaro, Qro., Mexico
| | - E Cabrera-Díaz
- Departamento de Salud Pública, Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Camino Ramón Padilla Sánchez 2100, Zapopan, Jalisco 45200, Mexico
| | - S M Arvizu-Medrano
- Departamento de Investigación y Posgrado de Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Col. Las Campanas, 76010 Querétaro, Qro., Mexico
| | - A Gómez-Baltazar
- Departamento de Investigación y Posgrado de Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Col. Las Campanas, 76010 Querétaro, Qro., Mexico
| | - M Hernández-Iturriaga
- Departamento de Investigación y Posgrado de Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Col. Las Campanas, 76010 Querétaro, Qro., Mexico
| | - A Godínez-Oviedo
- Departamento de Investigación y Posgrado de Alimentos, Facultad de Química, Universidad Autónoma de Querétaro, Cerro de las Campanas s/n, Col. Las Campanas, 76010 Querétaro, Qro., Mexico.
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Prado T, Rey-Benito G, Miagostovich MP, Sato MIZ, Rajal VB, Filho CRM, Pereira AD, Barbosa MRF, Mannarino CF, da Silva AS. Wastewater-based epidemiology for preventing outbreaks and epidemics in Latin America - Lessons from the past and a look to the future. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 865:161210. [PMID: 36581294 DOI: 10.1016/j.scitotenv.2022.161210] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 12/05/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
Wastewater-based epidemiology (WBE) is an approach with the potential to complement clinical surveillance systems. Using WBE, it is possible to carry out an early warning of a possible outbreak, monitor spatial and temporal trends of infectious diseases, produce real-time results and generate representative epidemiological information in a territory, especially in areas of social vulnerability. Despite the historical uses of this approach, particularly in the Global Polio Eradication Initiative, and for other pathogens, it was during the COVID-19 pandemic that occurred an exponential increase in environmental surveillance programs for SARS-CoV-2 in wastewater, with many experiences and developments in the field of public health using data for decision making and prioritizing actions to control the pandemic. In Latin America, WBE was applied in heterogeneous contexts and with emphasis on populations that present many socio-environmental inequalities, a condition shared by all Latin American countries. This manuscript addresses the concepts and applications of WBE in public health actions, as well as different experiences in Latin American countries, and discusses a model to implement this surveillance system at the local or national level. We emphasize the need to implement this sentinel surveillance system in countries that want to detect the early entry and spread of new pathogens and monitor outbreaks or epidemics of infectious agents in their territories as a complement of public health surveillance systems.
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Affiliation(s)
- Tatiana Prado
- Laboratory of Comparative and Environmental Virology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP 21040-360, Brazil.
| | - Gloria Rey-Benito
- Pan American Health Organization (PAHO/WHO), 525 23rd St NW, Washington, DC 20037, United States of America.
| | - Marize Pereira Miagostovich
- Laboratory of Comparative and Environmental Virology, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP 21040-360, Brazil
| | - Maria Inês Zanoli Sato
- Department of Environmental Analysis, Environmental Company of the São Paulo State (CETESB), Av. Prof. Frederico Hermann Jr., 345, São Paulo CEP 05459-900, Brazil
| | - Veronica Beatriz Rajal
- Instituto de Investigaciones para la Industria Química (INIQUI), Universidad Nacional de Salta (UNSa) - Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) and Facultad de Ingeniería, UNSa, Av. Bolivia 5150, Salta 4400, Argentina; Singapore Centre for Environmental Life Science Engineering (SCELSE), Nanyang Technological University, Singapore
| | - Cesar Rossas Mota Filho
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Alyne Duarte Pereira
- Department of Sanitary and Environmental Engineering, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil
| | - Mikaela Renata Funada Barbosa
- Department of Environmental Analysis, Environmental Company of the São Paulo State (CETESB), Av. Prof. Frederico Hermann Jr., 345, São Paulo CEP 05459-900, Brazil
| | - Camille Ferreira Mannarino
- Sergio Arouca National School of Public Health, Oswaldo Cruz Foundation, Av. Brasil, 4365, Manguinhos, Rio de Janeiro, CEP 21040-360, Brazil
| | - Agnes Soares da Silva
- Pan American Health Organization (PAHO/WHO), 525 23rd St NW, Washington, DC 20037, United States of America.
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Zhang X, Zhang L, Wang Y, Zhang M, Zhou J, Liu X, Wang Y, Qu C, Han W, Hou M, Deng F, Luo Y, Mao Y, Gu W, Dong Z, Pan Y, Zhang D, Tang S, Zhang L. Detection of the SARS-CoV-2 Delta Variant in the Transboundary Rivers of Yunnan, China. ACS ES&T WATER 2022; 2:2367-2377. [PMID: 37552741 PMCID: PMC9631342 DOI: 10.1021/acsestwater.2c00224] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2022] [Revised: 10/08/2022] [Accepted: 10/10/2022] [Indexed: 05/30/2023]
Abstract
Ruili and Longchuan, two border counties in southwestern China, are facing epidemic control challenges due to the high rate of COVID-19 infections originating from neighboring Myanmar. Here, we aimed to establish the applicability of wastewater and environmental water surveillance of SARS-CoV-2 and conduct whole-genome sequencing (WGS) to trace the possible infection origin. In August 2021, total 72 wastewater and river water samples were collected from 32 sampling sites. SARS-CoV-2 ORF1ab and N genes were measured by RT-qPCR. We found that 19 samples (26.39%) were positive, and the viral loads of ORF1ab and N genes were 6.62 × 102-2.55×105 and 1.86 × 103-2.32 × 105 copies/L, respectively. WGS further indicated the sequences in two transboundary river samples, and one hospital wastewater sample belonged to the delta variant, suggesting that the infection source might be areas with high COVID-19 delta variant incidence in Southeast Asia (e.g., Myanmar). We reported for the first time the detection and quantification of SARS-CoV-2 RNA in the transboundary rivers of Myanmar-China. Our findings demonstrate that wastewater and environmental water may provide independent and nonintrusive surveillance points to monitor the global spread of emerging COVID-19 variants of concern, particularly in high-risk regions or border areas with considerable epidemic challenges and poor wastewater treatment facilities.
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Affiliation(s)
- Xiao Zhang
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Liang Zhang
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Yuanyuan Wang
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Meiling Zhang
- Acute Infectious Disease Prevention and Control
Institute, Yunnan Center for Disease Control and Prevention,
Kunming, Yunnan650022, China
| | - Jienan Zhou
- Acute Infectious Disease Prevention and Control
Institute, Yunnan Center for Disease Control and Prevention,
Kunming, Yunnan650022, China
| | - Xin Liu
- Ruili Center for Disease Control and
Prevention, Ruili, Yunnan678599, China
| | - Yan Wang
- Ruili Center for Disease Control and
Prevention, Ruili, Yunnan678599, China
| | - Changsheng Qu
- Longchuan Center for Disease Control and
Prevention, Longchuan, Yunnan678799, China
| | - Wenxiang Han
- Longchuan Center for Disease Control and
Prevention, Longchuan, Yunnan678799, China
| | - Min Hou
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Fuchang Deng
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Yueyun Luo
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Yixin Mao
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Wen Gu
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Zhaomin Dong
- School of Space and Environment, Beihang
University, Beijing100191, China
| | - Yang Pan
- Institute for Infectious Disease and Endemic Disease Control,
Beijing Center for Disease Prevention and Control,
Beijing100013, China
| | - Daitao Zhang
- Institute for Infectious Disease and Endemic Disease Control,
Beijing Center for Disease Prevention and Control,
Beijing100013, China
| | - Song Tang
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
| | - Lan Zhang
- China CDC Key Laboratory of Environment and Population
Health, National Institute of Environmental Health, Chinese Center for
Disease Control and Prevention, Beijing100021,
China
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Martins RM, Carvalho T, Bittar C, Quevedo DM, Miceli RN, Nogueira ML, Ferreira HL, Costa PI, Araújo JP, Spilki FR, Rahal P, Calmon MF. Long-Term Wastewater Surveillance for SARS-CoV-2: One-Year Study in Brazil. Viruses 2022; 14:v14112333. [PMID: 36366431 PMCID: PMC9692902 DOI: 10.3390/v14112333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Revised: 09/26/2022] [Accepted: 10/05/2022] [Indexed: 02/01/2023] Open
Abstract
Wastewater-based epidemiology (WBE) is a tool involving the analysis of wastewater for chemicals and pathogens at the community level. WBE has been shown to be an effective surveillance system for SARS-CoV-2, providing an early-warning-detection system for disease prevalence in the community via the detection of genetic materials in the wastewater. In numerous nation-states, studies have indicated the presence of SARS-CoV-2 in wastewater. Herein, we report the primary time-course monitoring of SARS-CoV-2 RNA in wastewater samples in São José do Rio Preto-SP/Brazil in order to explain the dynamics of the presence of SARS-CoV-2 RNA during one year of the SARS-CoV-2 pandemic and analyze possible relationships with other environmental parameters. We performed RNA quantification of SARS-CoV-2 by RT-qPCR using N1 and N2 targets. The proportion of positive samples for every target resulted in 100% and 96.6% for N1 and N2, respectively. A mean lag of -5 days is observed between the wastewater signal and the new SARS-CoV-2-positive cases reported. A correlation was found between the air and wastewater temperatures and therefore between the SARS-CoV-2 viral titers for N1 and N2 targets. We also observed a correlation between SARS-CoV-2 viral titers and media wastewater flow for the N1 target. In addition, we observed higher viral genome copies within the wastewater samples collected on non-rainy days for the N1 target. Thus, we propose that, based on our results, monitoring raw wastewater may be a broadly applicable strategy that might contribute to resolving the pressing problem of insufficient diagnostic testing; it may represent an inexpensive and early-warning method for future COVID-19 outbreaks, mainly in lower- and middle-income countries.
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Affiliation(s)
- Renan Moura Martins
- Laboratory of Genomic Studies, Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University (UNESP), São José do Rio Preto 15054-000, SP, Brazil
| | - Tamara Carvalho
- Laboratory of Genomic Studies, Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University (UNESP), São José do Rio Preto 15054-000, SP, Brazil
| | - Cintia Bittar
- Laboratory of Genomic Studies, Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University (UNESP), São José do Rio Preto 15054-000, SP, Brazil
| | - Daniela Muller Quevedo
- Institute of Exact and Technological Sciences (ICET), University Feevale, Novo Hamburgo 93525-075, RS, Brazil
| | - Rafael Nava Miceli
- SeMAE-Autonomous Municipal Water and Sewage Service, São José do Rio Preto 15048-000, SP, Brazil
| | - Mauricio Lacerda Nogueira
- Virology Research Laboratory (LPV), Faculty of Medicine of São José do Rio Preto (FAMERP), São José do Rio Preto 15090-000, SP, Brazil
| | - Helena Lage Ferreira
- Applied Preventive Veterinary Medicine Laboratory, Department of Veterinary Medicine, Faculty of Animal Science and Food Engineering (FZEA), University of São Paulo (USP), Pirassununga 13635-900, SP, Brazil
| | - Paulo Inácio Costa
- Department of Clinical Analysis, School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara 14801-360, SP, Brazil
| | - João Pessoa Araújo
- Biotechnology Institute, São Paulo State University (UNESP), Botucatu 18607-440, SP, Brazil
| | - Fernando Rosado Spilki
- Molecular Microbiology Laboratory, University Feevale, Novo Hamburgo 93525-075, RS, Brazil
| | - Paula Rahal
- Laboratory of Genomic Studies, Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University (UNESP), São José do Rio Preto 15054-000, SP, Brazil
| | - Marilia Freitas Calmon
- Laboratory of Genomic Studies, Institute of Biosciences, Letters and Exact Sciences (IBILCE), São Paulo State University (UNESP), São José do Rio Preto 15054-000, SP, Brazil
- Correspondence:
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de Freitas Bueno R, Claro ICM, Augusto MR, Duran AFA, Camillo LDMB, Cabral AD, Sodré FF, Brandão CCS, Vizzotto CS, Silveira R, de Melo Mendes G, Arruda AF, de Brito NN, Machado BAS, Duarte GRM, de Lourdes Aguiar-Oliveira M. Wastewater-based epidemiology: A Brazilian SARS-COV-2 surveillance experience. JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 2022; 10:108298. [PMID: 35873721 PMCID: PMC9295330 DOI: 10.1016/j.jece.2022.108298] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 07/05/2022] [Accepted: 07/17/2022] [Indexed: 05/11/2023]
Abstract
Since 2020, developed countries have rapidly shared both publicly and academically relevant wastewater surveillance information. Data on SARS-CoV-2 circulation is pivotal for guiding public health policies and improving the COVID-19 pandemic response. Conversely, low- and middle-income countries, such as Latin America and the Caribbean, showed timid activities in the Wastewater-Based Epidemiology (WBE) context. In these countries, isolated groups perform viral wastewater monitoring, and the data are unevenly shared or accessible to health agencies and the scientific community. This manuscript aims to highlight the relevance of a multiparty effort involving research, public health, and governmental agencies to support usage of WBE methodology to its full potential during the COVID-19 pandemic as part of a joint One Health surveillance approach. Thus, in this study, we explored the results obtained from wastewater surveillance in different regions of Brazil as a part of the COVID-19 Wastewater Monitoring Network ANA (National Water Agency), MCTI (Ministry of Science, Technology, and Innovations) and MS (Ministry of Health). Over the epidemiological weeks of 2021 and early 2022, viral RNA concentrations in wastewater followed epidemiological trends and variations. The highest viral loads in wastewater samples were detected during the second Brazilian wave of COVID-19. Corroborating international reports, our experience demonstrated usefulness of the WBE approach in viral surveillance. Wastewater surveillance allows hotspot identification, and therefore, early public health interventions. In addition, this methodology allows tracking of asymptomatic and oligosymptomatic individuals, who are generally underreported, especially in emerging countries with limited clinical testing capacity. Therefore, WBE undoubtedly contributes to improving public health responses in the context of this pandemic, as well as other sanitary emergencies.
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Affiliation(s)
- Rodrigo de Freitas Bueno
- Federal University of ABC. Center of Engineering, Modelling and Applied Social Sciences (CECS), Santo Andre, São Paulo, Brazil
| | - Ieda Carolina Mantovani Claro
- Federal University of ABC. Center of Engineering, Modelling and Applied Social Sciences (CECS), Santo Andre, São Paulo, Brazil
| | - Matheus Ribeiro Augusto
- Federal University of ABC. Center of Engineering, Modelling and Applied Social Sciences (CECS), Santo Andre, São Paulo, Brazil
| | - Adriana Feliciano Alves Duran
- Federal University of ABC. Center of Engineering, Modelling and Applied Social Sciences (CECS), Santo Andre, São Paulo, Brazil
| | | | - Aline Diniz Cabral
- Federal University of ABC. Center of Engineering, Modelling and Applied Social Sciences (CECS), Santo Andre, São Paulo, Brazil
| | | | | | - Carla Simone Vizzotto
- University of Brasilia, Department of Civil and Environmental Engineering, Brasília, Federal District, Brazil
| | - Rafaella Silveira
- University of Brasilia. Institute of Chemistry, Brasília, Federal District, Brazil
- University of Brasilia, Department of Civil and Environmental Engineering, Brasília, Federal District, Brazil
| | | | | | | | - Bruna Aparecida Souza Machado
- University Center SENAI/CIMATEC. SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), Salvador, Bahia, Brazil
| | | | - Maria de Lourdes Aguiar-Oliveira
- Laboratory of Respiratory Viruses and Measles, National/MoH and International/WHO Reference Laboratory in COVID-19, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
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Al Huraimel K, Alhosani M, Gopalani H, Kunhabdulla S, Stietiya MH. Elucidating the role of environmental management of forests, air quality, solid waste and wastewater on the dissemination of SARS-CoV-2. HYGIENE AND ENVIRONMENTAL HEALTH ADVANCES 2022; 3:100006. [PMID: 37519421 PMCID: PMC9095661 DOI: 10.1016/j.heha.2022.100006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/13/2022] [Accepted: 04/30/2022] [Indexed: 11/29/2022]
Abstract
The increasing frequency of zoonotic diseases is amongst several catastrophic repercussions of inadequate environmental management. Emergence, prevalence, and lethality of zoonotic diseases is intrinsically linked to environmental management which are currently at a destructive level globally. The effects of these links are complicated and interdependent, creating an urgent need of elucidating the role of environmental mismanagement to improve our resilience to future pandemics. This review focused on the pertinent role of forests, outdoor air, indoor air, solid waste and wastewater management in COVID-19 dissemination to analyze the opportunities prevailing to control infectious diseases considering relevant data from previous disease outbreaks. Global forest management is currently detrimental and hotspots of forest fragmentation have demonstrated to result in zoonotic disease emergences. Deforestation is reported to increase susceptibility to COVID-19 due to wildfire induced pollution and loss of forest ecosystem services. Detection of SARS-CoV-2 like viruses in multiple animal species also point to the impacts of biodiversity loss and forest fragmentation in relation to COVID-19. Available literature on air quality and COVID-19 have provided insights into the potential of air pollutants acting as plausible virus carrier and aggravating immune responses and expression of ACE2 receptors. SARS-CoV-2 is detected in outdoor air, indoor air, solid waste, wastewater and shown to prevail on solid surfaces and aerosols for prolonged hours. Furthermore, lack of protection measures and safe disposal options in waste management are evoking concerns especially in underdeveloped countries due to high infectivity of SARS-CoV-2. Inadequate legal framework and non-adherence to environmental regulations were observed to aggravate the postulated risks and vulnerability to future waves of pandemics. Our understanding underlines the urgent need to reinforce the fragile status of global environmental management systems through the development of strict legislative frameworks and enforcement by providing institutional, financial and technical supports.
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Affiliation(s)
- Khaled Al Huraimel
- Division of Consultancy, Research & Innovation (CRI), Sharjah Environment Company - Bee'ah, Sharjah, United Arab Emirates
| | - Mohamed Alhosani
- Division of Consultancy, Research & Innovation (CRI), Sharjah Environment Company - Bee'ah, Sharjah, United Arab Emirates
| | - Hetasha Gopalani
- Division of Consultancy, Research & Innovation (CRI), Sharjah Environment Company - Bee'ah, Sharjah, United Arab Emirates
| | - Shabana Kunhabdulla
- Division of Consultancy, Research & Innovation (CRI), Sharjah Environment Company - Bee'ah, Sharjah, United Arab Emirates
| | - Mohammed Hashem Stietiya
- Division of Consultancy, Research & Innovation (CRI), Sharjah Environment Company - Bee'ah, Sharjah, United Arab Emirates
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Zarza E, Diego-García E, García LV, Castro R, Mejía G, Herrera D, Cuevas R, Palomeque Á, Iša P, Guillén K. Monitoring SARS-CoV-2 in the Wastewater and Rivers of Tapachula, a Migratory Hub in Southern Mexico. FOOD AND ENVIRONMENTAL VIROLOGY 2022; 14:199-211. [PMID: 35508751 PMCID: PMC9067545 DOI: 10.1007/s12560-022-09523-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 04/20/2022] [Indexed: 05/11/2023]
Abstract
The COVID-19 pandemic has been monitored by applying different strategies, including SARS-CoV-2 detection with clinical testing or through wastewater-based epidemiology (WBE). We used the latter approach to follow SARS-CoV-2 dispersion in Tapachula city, located in Mexico's tropical southern border region. Tapachula is a dynamic entry point for people seeking asylum in Mexico or traveling to the USA. Clinical testing facilities for SARS-CoV-2 monitoring are limited in the city. A total of eighty water samples were collected from urban and suburban rivers and sewage and a wastewater treatment plant over 4 months in Tapachula. We concentrated viral particles with a PEG-8000-based method, performed RNA extraction, and detected SARS-CoV-2 particles through RT-PCR. We considered the pepper mild mottle virus as a fecal water pollution biomarker and analytical control. SARS-CoV-2 viral loads (N1 and N2 markers) were quantified and correlated with official regional statistics of COVID-19 bed occupancy and confirmed cases (r > 91%). Our results concluded that WBE proved a valuable tool for tracing and tracking the COVID-19 pandemic in tropical countries with similar water temperatures (21-29 °C). Monitoring SARS-CoV-2 through urban and suburban river water sampling would be helpful in places lacking a wastewater treatment plant or water bodies with sewage discharges.
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Affiliation(s)
- Eugenia Zarza
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
- Investigadoras CONACyT- El Colegio de la Frontera Sur, Av. Insurgentes Sur 1582, Col. Crédito Constructor, Benito Juárez, 03940, Mexico City, Mexico
| | - Elia Diego-García
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
- Investigadoras CONACyT- El Colegio de la Frontera Sur, Av. Insurgentes Sur 1582, Col. Crédito Constructor, Benito Juárez, 03940, Mexico City, Mexico
| | - Luz Verónica García
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
| | - Ricardo Castro
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
| | - Gamaliel Mejía
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
| | - David Herrera
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
| | - Raúl Cuevas
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
| | - Ángeles Palomeque
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico
| | - Pavel Iša
- Instituto de Biotecnología, Universidad Nacional Autónoma de México, Av. Universidad 2001, 62210, Cuernavaca, Morelos, Mexico
| | - Karina Guillén
- El Colegio de la Frontera Sur (ECOSUR), Grupo Académico de Biotecnología Ambiental, Carretera Antiguo Aeropuerto Km 2.5, 30700, Tapachula, Chiapas, Mexico.
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Wang Q, Liu L. On the Critical Role of Human Feces and Public Toilets in the Transmission of COVID-19: Evidence from China. SUSTAINABLE CITIES AND SOCIETY 2021; 75:103350. [PMID: 34540563 PMCID: PMC8433098 DOI: 10.1016/j.scs.2021.103350] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 09/08/2021] [Accepted: 09/08/2021] [Indexed: 05/05/2023]
Abstract
The surprising spread speed of the COVID-19 pandemic creates an urgent need for investigating the transmission chain or transmission pattern of COVID-19 beyond the traditional respiratory channels. This study therefore examines whether human feces and public toilets play a critical role in the transmission of COVID-19. First, it develops a theoretical model that simulates the transmission chain of COVID-19 through public restrooms. Second, it uses stabilized epidemic data from China to empirically examine this theory, conducting an empirical estimation using a two-stage least squares (2SLS) model with appropriate instrumental variables (IVs). This study confirms that the wastewater directly promotes the transmission of COVID-19 within a city. However, the role of garbage in this transmission chain is more indirect in the sense that garbage has a complex relationship with public toilets, and it promotes the transmission of COVID-19 within a city through interaction with public toilets and, hence, human feces. These findings have very strong policy implications in the sense that if we can somehow use the ratio of public toilets as a policy instrument, then we can find a way to minimize the total number of infections in a region. As shown in this study, pushing the ratio of public toilets (against open defecation) to the local population in a city to its optimal level would help to reduce the total infection in a region.
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Affiliation(s)
- Qiuyun Wang
- School of Economics, Southwestern University of Finance and Economics, P.R China
| | - Lu Liu
- School of Economics, Southwestern University of Finance and Economics, P.R China
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