Wastewater Based Epidemiology

Wastewater-Based epidemiology (WBE) is based on the extraction, detection, analysis, and interpretation of preading of any disease or disorder caused by the chemical/biological compounds (biomarkers) excreted in the sewage system. sos or pathogens that come from wastewater analysis could be equivalent to community-based materials such as urine and , fecal analysis that can give a reflection of community health state Subsequently. In a pandemic situamaterials, medical waste  or any solid or liquid waste product. The extraction, with time limitations and restrict access to massive diagnostic, an alternative approach as a complementary tool to investigate virus circulationdetection, analysis, and interpretation of chemical/biological compounds (biomarkers) excreted in the community is essential. In the situation of limited and time-consuming diagnostic tests, monitoring sewage systemsewage system can eventually contribute to WBE. So wastewater analysis could better estimate the spread of the virus and determine whether there are potential cases because wastewater surveillance can also account for those who have only mild or no equivalent to community-based urine and fecal analysis that can symptoms.subsequently give a reflection  of community health. Under pandemic situation with time limitations and restrict access to massive diagnostic, an alternative approach as a complementary tool to investigate virus circulation in the community is essential. In the situation of limited and time-consuming diagnostic tests, monitoring sewage systems could better estimate the spread of the virus and determine whether there are potential cases because wastewater surveillance can also account for those who contract mild or asymptomatic state.

wastewater-based epidemiology;SARS-CoV-2;COVID-19;coronavirus;detection and quantification protocols

Fast and effective surveillance systems works ares the bedrock offor prevention, and control of infectious outbreak which. It is because of dissimilar conditions of different health enth of various individuals on which different entities around the world are working on it[1][2][3]. IUn a der such and this pandemic situation, withhaving time limitations and restrict access to massive diagnostic centers, an alternative approach as a complementary tool to investigate virus circulation in the community is essential[4].

The importance of such a surveillance system has been more highlighted with the emergence of coronavirus respiratory disease (COVID-19) In December 2019, Wuhan, China[2][4]. Although air mediated infection mode of the COVID-19 was first not accepted by many including WHO, now it is an well established fact that SAR-CoV-2 is air borne in nature. This fact has been accepted prior to the 2nd wave of COVID-19 hit the world and under the prevalence of the 3rd wave of the disease, Wastewater-based epidemiology (WBE) now gained most of the attraction to be studied.

Since many SARS-CoV-2 patients are might ehave exhibit few or non-specific symptoms, rapid and accurate diagnosis of potential virus carriers and identification of asymptomatic cases is a critical step to suppress the risk of disease transmission at the early stage[5]. This is because in many parts of the word, waste eater detection of the virus has ben found to be positively correlated with the unset of the disease in communities. 

Wastewater-based epidemiology (WBE) provides comprehensive information on community health status in near real-time based upon analyses of wastewater compounds. More importantly, the data from WBE is not only useful to detect the onset of pandemics but also is useful to detect various other toxins and pathogens that can cause massive health damages to the communities. All the physical, chemical and biological substances of the community are excreted to the sewer systems and transported to wastewater treatment plants (WWTP) that serving definedes as catchment areas[2]. So, wastewater analysis could be equivalent to community-based urine and fecal analysis that can give a reflection of community health state[3][6][7]. The obtained data are not only useful for the adaption of preventives against water water treatment but also useful for the treatment of solid waste (that act as carrier of many compounds and pathogens) including soil based contaminations.   

This approach was previously used to monitoring pharmaceutical consumption, early detection of infectious outbreaks, and detection of viral pathogens such as adenovirus, poliovirus and hepatitis A[8]. Since the first report of SARS-CoV2 detection in patient’s feces and identification of virus genomes in wastewater in the Netherlands, Australia, and Paris, France, WBE has been proposed as a surveillance tool to investigate the presence and prevalence of the virus in the community[9][10]. In the situation of limited and time-consuming diagnostic tests monitoring sewage systems could provide a better estimate of the spread of the virus and determine whether there are potential cases because wastewater surveillance can also account for those who have only mild or no symptoms[11].

Early and population-wide scale analysis, represent the WBE as a potential early warning tool to strengthen health entity's preparedness and limit the health and economic burden caused in (re) emergence of the infectious outbreak[3].

Despite the promising aspects of utilizing WBE in COVID-19 surveillance, there are still challenges in representative sampling, virus recovery, and concentration methods as well as population normalization and ethical issues that should be considered[12]. Establishing the water borne nature of COVID-19 is still wanting because only waste water surveillance for the detection of the viral RNA has been done but their infectious nature has to be correlated with clinical states. 

 

References

  1. Organization, W.H., WHO guidelines on ethical issues in public health surveillance. 2017.
  2. Sims, N. and B.J.E.i. Kasprzyk-Hordern, Future perspectives of wastewater-based epidemiology: monitoring infectious disease spread and resistance to the community level. 2020. 139: p. 105689.
  3. Xagoraraki, I. and E. O’Brien, Wastewater-based epidemiology for early detection of viral outbreaks, in Women in water quality. 2020, Springer. p. 75-97.
  4. Medema, G., et al., Presence of SARS-Coronavirus-2 RNA in sewage and correlation with reported COVID-19 prevalence in the early stage of the epidemic in the Netherlands. 2020. 7(7): p. 511-516.
  5. Mao, K., H. Zhang, and Z. Yang, Can a paper-based device trace COVID-19 sources with wastewater-based epidemiology? 2020, ACS Publications.
  6. Sinclair, R.G., et al., Pathogen surveillance through monitoring of sewer systems. 2008. 65: p. 249.
  7. Mallapaty, S.J.N., How sewage could reveal true scale of coronavirus outbreak. 2020. 580(7802): p. 176-177.
  8. Ahmed, W., et al., First confirmed detection of SARS-CoV-2 in untreated wastewater in Australia: a proof of concept for the wastewater surveillance of COVID-19 in the community. 2020. 728: p. 138764.
  9. Barcelo, D.J.J.o.E.C.E., An environmental and health perspective for COVID-19 outbreak: meteorology and air quality influence, sewage epidemiology indicator, hospitals disinfection, drug therapies and recommendations. 2020. 8(4): p. 104006.
  10. Wu, F., et al., SARS-CoV-2 titers in wastewater are higher than expected from clinically confirmed cases. 2020. 5(4): p. e00614-20.
  11. Wurtzer, S., et al., Time course quantitative detection of SARS-CoV-2 in Parisian wastewaters correlates with COVID-19 confirmed cases. 2020: p. 2020.04.12.20062679.
  12. Polo, D., et al., Making waves: Wastewater-based epidemiology for COVID-19–approaches and challenges for surveillance and prediction. 2020. 186: p. 116404.
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