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Sewage/Covid/ Very important info

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Post by espíritu del lago on Mon Jun 22, 2020 2:38 am

https://www.researchgate.net/publication/313589212_Pathogen_cross-transmission_via_building_sanitary_plumbing_systems_in_a_full_scale_pilot_test-rig

"The WHO Consensus Document on the epidemiology of the SARS epidemic in 2003, included a report on a concentrated outbreak in one Hong Kong housing block which was considered a ‘super-spreading event’. The WHO report conjectured that the sanitary plumbing system was one transmission route for the virus. Empty U-traps allowed the aerosolised virus to enter households from the sewerage system. No biological evidence was presented. This research reports evidence that pathogens can be aerosolised and transported on airstreams within sanitary plumbing systems and enter buildings via empty U-traps. A sanitary plumbing system was built, representing two floors of a building, with simulated toilet flushes on the lower floor and a sterile chamber with extractor fan on the floor above. Cultures of a model organism, Pseudomonas putida at 10⁶–10⁹ cfu ml⁻¹ in 0·85% NaCl were flushed into the system in volumes of 6 to 20 litres to represent single or multiple toilet flushes. Air and surface samples were cultured on agar plates and assessed qualitatively and semi-quantitatively. Flushing from a toilet into a sanitary plumbing system generated enough turbulence to aerosolise pathogens. Typical sanitary plumbing system airflows (between 20–30 ls⁻¹) were sufficient to carry aerosolised pathogens between different floors of a building. Empty U-traps allowed aerosolised pathogens to enter the chamber, encouraging cross-transmission. All parts of the system were found to be contaminated post-flush. Empty U-traps have been observed in many buildings and a risk assessment indicates the potential for high risk cross-transmission under defect conditions in buildings with high pathogen loading such as hospitals. Under defective conditions (which are not uncommon) aerosolised pathogens can be carried on the airflows within sanitary plumbing systems. Our findings show that greater consideration should be given to this mode of pathogen transmission."

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Pathogen cross-transmission via building sanitary plumbing systems in a full scale pilot test-rig
Article (PDF Available) in PLoS ONE 12(2):e0171556 · February 2017 with 4,134 Reads 
DOI: 10.1371/journal.pone.0171556
Cite this publication
Michael Gormley
20.96Heriot-Watt University
Thomas J Aspray
28.56Solidsense Ltd
David Kelly
13.95Heriot-Watt University
Cristina Rodriguez-Gil
--------------------------------------

I hope Trailrunner or anyone reading this can bring this to the attention of someone who monitors raw sewage into the lake. Also community awareness. Sometimes back I posted this info in the medical section

https://www.circleofblue.org/2020/world/australia-researchers-test-sewage-for-new-coronavirus/

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Post by espíritu del lago on Mon Jun 22, 2020 2:51 am

I'm including the link for discussion and research. It is an active and ongoing discussion on Twitter. If your on Twitter just follow.
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(1) The "Fecal-Sewer-Aerosol" transmission theory:

Yesterday, I reported my discovery that #COVID19 transmission seems to follow river watersheds where cities have large Combined Sewer Overflow (CSO) discharges (Milan, London and New York v. Tokyo).

https://t.co/40FciZgMt2
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Post by Jreboll on Mon Jun 22, 2020 5:43 am

Let’s not forget the half life of this organism is pretty long.
NEJM article from March 10, 2020:

33 HCoV-19 (SARS-2) has caused >88,000 reported illnesses with a current case-fatality ratio of ~2%. Here,
34 we investigate the stability of viable HCoV-19 on surfaces and in aerosols in comparison with SARS-
35 CoV-1. Overall, stability is very similar between HCoV-19 and SARS-CoV-1. We found that viable virus
36 could be detected in aerosols up to 3 hours post aerosolization, up to 4 hours on copper, up to 24 hours on
37 cardboard and up to 2-3 days on plastic and stainless steel. HCoV-19 and SARS-CoV-1 exhibited similar
38 half-lives in aerosols, with median estimates around 2.7 hours. Both viruses show relatively long viability
39 on stainless steel and polypropylene compared to copper or cardboard: the median half-life estimate for
40 HCoV-19 is around 13 hours on steel and around 16 hours on polypropylene. Our results indicate that
41 aerosol and fomite transmission of HCoV-19 is plausible, as the virus can remain viable in aerosols for
42 multiple hours and on surfaces up to days.

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Post by addtocart on Mon Jun 22, 2020 9:22 am

So, don't let your dog drink out of the toilet and then lick your face?
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Post by espíritu del lago on Mon Jun 22, 2020 2:37 pm

addtocart wrote:So, don't let your dog drink out of the toilet and then lick your face?

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4692156/
"It may be concluded from the above that flush toilets produce substantial quantities of toilet plume aerosol capable of entraining microorganisms at least as large as bacteria, that sufficiently small microbe-laden droplets will evaporate to form droplet nuclei bioaerosols small enough to be inhaled deep into the lung, and that these bioaerosols may remain viable in the air for extended periods and travel with air currents. Production of these bioaerosols during multiple flushes after contamination suggests a long-term potential for a contaminated toilet to be an infectious bioaerosol generator."

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Post by Jreboll on Mon Jun 22, 2020 2:48 pm

Keeping a clean toilet is essential and squirting in some Clorox on a daily basis and also avoid using public toilets.

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