detection of the bk virus in urban wastewater inlets into the karun river

Background and objectives: the presence of the bk virus in wastewater indicates pollution, as it is shed in the urine of infected individuals. over fifty percent of the human population remains asymptomatic for the bk virus. reactivation of the bk virus in immunosuppressed individuals can lead to serious health issues, including cystic hemorrhagic, nephritis, and kidney graft rejection. the bk virus is associated with various cancers, such as head and neck, prostate, bladder, and colorectal cancers. the urban wastewater inlets into the karun river cause the river contamination. this study focused on detecting the bk virus in wastewater inlet in karun river, ahvaz city, iran.materials and methods: sixty raw wastewater samples were collected from diverse urban sources and concentrated using polyethylene glycol 6000 to isolate bk virus. the bk virus isolates were analyzed for genotypes and the non-coding control region (nccr).results: the nested pcr results indicated that thirty-two out of sixty samples (53.33%) were positive for the bk virus. the phylogenetic analysis revealed the dominance of bk virus genotype ib2, followed by genotype 4. the bk virus non-coding control region (nccr) analysis identified an archetype strain.conclusion: the sewage plant treatment should be implemented to remove pathogenic viruses specially bk virus and to curb the circulating of bk virus in human and environment.