elbows
Well-Known Member
A paper I had missed from November about one of the subjects I often go on about, sewage/wastewater surveillance.
There have been more trials and proper systems setup since I last looked. The paper contains interesting info about how Wales used a system to help them see what the tourism-related risks were for Wales, with such info feeding into policy.
Liverpool also yielded interesting data. This form of surveillance is, as expected, useful and valid.
There have been more trials and proper systems setup since I last looked. The paper contains interesting info about how Wales used a system to help them see what the tourism-related risks were for Wales, with such info feeding into policy.
Liverpool also yielded interesting data. This form of surveillance is, as expected, useful and valid.
Liverpool – Data from Sandon Docks STW indicates that SARS-CoV-2 concentrations in wastewater track the dynamics of positive case rates in both the magnitude and direction of the disease. Liverpool represents a site with a sharp increase in positive cases from mid- September to late October 2020 (Figure S2, Appendix 7.3)
Plymouth – A distinct peak in virus load at the STW with no corresponding increase in the existing low positive case number was observed. The source was identified to be an isolated outbreak where positive case data was not included in the reported T&T numbers (Figure S3, Appendix 7.3)
Small City – Sampling of wastewater upstream of the STW provides potential for greater measurement acuity. Low viral concentrations were identified for five consecutive days, after two weeks of ND (not detected) results at a site receiving wastewater from a multi-occupancy residential building. A positive case was subsequently reported, suggesting that low shedding rates from individuals are identifiable. An order of magnitude increase in wastewater viral concentrations was observed and further tests revealed two positive individuals (Figure S4, Appendix 7.3)
Scotland - At Orkney STW (population equivalent 7750), virus was detected in the wastewater where less than 10 positive cases had been recorded in test numbers and Public Health Scotland were notified