Abstract
We investigated the occurrence of tomato brown rugose fruit virus (ToBRFV) at a conventional wastewater treatment plant in Louisiana over a 13-month period, from March 2017 to March 2018. Influent, secondary effluent, and final effluent wastewater samples were collected monthly, and viruses were concentrated by the adsorption-elution method using an electronegative filter, followed by the detection using quantitative polymerase chain reaction. ToBRFV was detected in 10 (77 %) of 13 influent samples, 9 (69 %) of 13 in secondary effluent, and 6 (50 %) of 12 final effluents. The concentrations of ToBRFV in the influent samples ranged from 3.5 to 6.1 log10 copies/L and it was always higher than those in secondary or final effluents. Wastewater samples showed a high positive ratio of ToBRFV during fall and winter months. The findings highlight that routine monitoring of new viral indicator such as ToBRFV is necessary to understand its environmental distribution and correlation with pathogenic viruses. This is the first study providing quantitative data on the occurrence of ToBRFV in wastewater.
Published Version
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