The Spectre of SARS-CoV-2 in the Ambient Urban Natural Water in Ahmedabad and Guwahati: A Tale of Two Cities

Kumar, M.; Mazumder, P.; Deka, J. P.; Srivastava, V.; Mahanta, C.; Goswami, R.; Gupta, S.; Joshi, M.; Ramanathan, A.

COVID-19 positive patients can egest live SARS-CoV-2 virus through fecal matter and urine, raising concerns about viral transmission through the fecal-oral route and/or contaminated aerosolized water. These worries are heightened in many low and middle-income nations, where raw sewage is often dumped into surface waterways and open defecation betide. In this manuscript we attempt to discern the presence of SARS-CoV-2 genetic material (ORF-1ab, N and S genes) in two urban cities of India viz., Ahmedabad, in western India with ~12 WWTPs and Guwahati, in the northeast of the country with no such plants. 100% and 20% of the surface water samples had detectable SARSCoV-2 RNA load in Ahmedabad and Gandhinagar, respectively. N-gene>S-gene>ORF-1ab-gene were readily detected in the surface water of Ahmedabad, whereas, no such significant trend was found in the case of Guwahati. The high concentration of gene (ORF-1ab 800 copies/L for Sabarmati river, Ahmedabad and S-gene 565 copies/L for Bharalu urban river, Guwahati) found in natural waters indicates low sanitation and have various health and ecological consequences that should be investigated further.