国产热热热精品,亚洲视频久久】日韩,三级婷婷在线久久,99人妻精品视频,精品九热人人肉肉在线,AV东京热一区二区,91po在线视频观看,久久激情宗合,青青草黄色手机视频

Global EditionASIA 中文雙語(yǔ)Fran?ais
World
Home / World / Europe

Suspect traces in Barcelona water samples from March 2019

China Daily | Updated: 2020-06-29 11:16
Share
Share - WeChat
A worker washes the street outside of a medical emergency facility during the coronavirus disease (COVID-19) outbreak, in Barcelona, Spain, April 7, 2020. [Photo/Agencies]

Researchers at the University of Barcelona say they have detected the presence of the novel coronavirus in waste water samples collected in Barcelona on March 12, 2019.

"These results, sent to a high impact journal and published in the archive medRxiv, suggest the infection was present before knowing about any case of COVID-19 in any part of the world," the researchers said.

The study was led by researchers from the Enteric Virus Laboratory of the University of Barcelona in collaboration with the public-private company Aigues de Barcelona, which is responsible for managing the water cycle in Barcelona's metropolitan area, they said.

"Although COVID-19 is a respiratory disease, researchers proved there were large quantities of the coronavirus genome in the excrement that reached the wastewater. This situation makes wastewater-based epidemiology a potential tool for early detection of the circulation of the virus among the population," the researchers said.

Since April 13 this year, the researchers have analyzed the samples from Barcelona's two major water treatment plants.

"The levels of the SARS-CoV-2 (or novel coronavirus) genome coincided with the evolution of COVID-19 cases in the population," Albert Bosch, professor at the Faculty of Biology of the University of Barcelona and coordinator of the study, said.

During systematic sampling, the researchers analyzed frozen samples from the previous month, which revealed the novel coronavirus genome between early January and early March this year.

The findings brought forward the date of the coronavirus' arrival in Spain-the presence of the virus was first detected on Jan 15, 41 days before the official announcement of the first case of COVID-19 on Feb 25, the researchers said.

These results encouraged researchers to analyze frozen samples taken between January 2018 and December 2019, which led to "the shocking results of the presence of the SARS-CoV-2 genome in March 2019," they said.

Another study, by the National Institute of Health in Italy found that the coronavirus had been circulating in Italy's wastewater as far back as last December.

"Traces of the SARS-CoV-2 virus were present in the wastewater in (the northern cities of) Milan and Turin in December 2019," the researchers said.

Xinhua - Agencies

Most Viewed in 24 Hours
Top
BACK TO THE TOP
English
Copyright 1994 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
西城区| 溧水县| 安远县| 二连浩特市| 许昌县| 厦门市| 无锡市| 东乌| 金阳县| 龙海市| 英吉沙县| 南充市| 浑源县| 岳池县| 上虞市| 佛教| 潼南县| 抚顺市| 平乐县| 泊头市| 永川市| 庄河市| 会同县| 扶余县| 炎陵县| 泾阳县| 呼和浩特市| 峨眉山市| 台南市| 林口县| 桓台县| 南部县| 江川县| 瓦房店市| 万年县| 那坡县| 拉孜县| 阜新| 安泽县| 漳浦县| 三明市|