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Monitoring SARS-CoV-2 in the wastewater and rivers of Tapachula, a migratory hub in southern Mexico

Zarza Franco, Guadalupe Eugenia [autora] | Diego García, Elia [autora] | García, Luz Verónica [autora] | Castro, Ricardo [autor] | Mejía González, Gamaliel [autor] | Herrera López, David [autor] | Cuevas González, Raúl [autor] | Palomeque, Ángeles [autora] | Iša, Pavel [autor] | Guillén Navarro, Griselda Karina [autora].
Tipo de material: Artículo en línea Artículo en línea Tipo de contenido: Texto Tipo de medio: Computadora Tipo de portador: Recurso en líneaTema(s): SARS-CoV-2 | Infecciones por coronavirus | Aguas residuales | Ríos | Monitoreo ambiental | PandemiaTema(s) en inglés: SARS-CoV-2 | Coronavirus infections | Sewage | Rivers | Environmental monitoring | PandemicsDescriptor(es) geográficos: Tapachula (Chiapas, México) | Cuenca del Río Coatán | Cuenca del Río Cahoacán (Chiapas, México) Nota de acceso: Disponible para usuarios de ECOSUR con su clave de acceso En: Food and Environmental Virology. Volumen 14, número 2 (June 2022), páginas 199–211. --ISSN: 1867-0342Número de sistema: 62540Resumen:
Inglés

The COVID-19 pandemic has been monitored by applying diferent 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 pollu tion biomarker and analytical control. SARS-CoV-2 viral loads (N1 and N2 markers) were quantifed and correlated with ofcial regional statistics of COVID-19 bed occupancy and confrmed 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.

Recurso en línea: https://doi.org/10.1007/s12560-022-09523-2
Lista(s) en las que aparece este ítem: Agua
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Disponible para usuarios de ECOSUR con su clave de acceso

The COVID-19 pandemic has been monitored by applying diferent 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 pollu tion biomarker and analytical control. SARS-CoV-2 viral loads (N1 and N2 markers) were quantifed and correlated with ofcial regional statistics of COVID-19 bed occupancy and confrmed 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. eng

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