Abstract
A 2-year surveillance study into enteric viruses contaminating environmental water samples was conducted in the city of Chang Mai, Thailand. The aim of the study was to investigate the prevalence of six different human enteric viruses, specifically, adenovirus (AdV), astrovirus (AstV), enteroviruses (EVs), human parechovirus (HPeV), rotavirus (RV), and saffold virus (SAFV), contaminating several types of environmental water using PCR and reverse transcription-PCR (RT-PCR) methods. All targeted viruses were detected with different levels of prevalence. The levels ranged from 0.8 to 4.8% (AdV, 0.8%; AstV, 4.8%; EV, 0.8%; HPeV, 3.2%; RV, 0.8%; SAFV, 3.2%). A wide variety of human enteric virus genotypes, including AdV-41, AstV-MLB1, coxsackievirus A, HPeV1, 5, and 6, RV G4[P8], and SAFV-2 and 3 were detected. The overall picture of the 13 human enteric viruses that were detected in environmental water in Chiang Mai, Thailand, is also summarized in this study. The data and the findings of this study will provide a better understanding of the viral dynamics in environmental water. The detection of these viruses in environmental water indicates there is the potential for human infection from this source. IMPORTANCE Human enteric viruses are a major cause of gastrointestinal illness, and these viruses can be introduced into environmental water through various routes. Viral contamination in water could play a significant role in human health. This study demonstrated the prevalence of six different enteric viruses, adenovirus, astrovirus, enteroviruses, human parechovirus, rotavirus, and saffold virus, contaminating environmental water. We also analyzed the overall prevalence of other enteric viruses that were in this area, and the findings revealed a wide diversity of the enteric viruses contaminating environmental water. The data provide a better understanding of the epidemiologic importance of viral contamination of the water and highlight the need for better management of wastewater disposal and effective environmental water treatment to prevent the human population from infection.
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