Relationship between precipitation, flow, water temperature and soil use with adenovirus contamination in surface water resources 98 • This work presents an analysis between the presence of Human Mastadenovirus (HAdV) type C serotypes 2 e 5 – HAdV-C (2 and 5) and type F serotypes 40 e 41 – HAdV-F (40 and 41), as well as bovine Mastadenovirus (BAdV) suspended on thewater’s blade of river, correlating themwith the antecedent precipitation, flow of the water body, water temperature, and soil use around the sampled points. • Higher concentrations of HAdV-C (2 and 5), HAdV-F (40 and 41) and BAdV were found for periods of lower flow. 1. INTRODUCTION The population increase occurred in a disorderly manner, without the proper basic structures, leading to the inadequate discharge of human and animal waste into the water bodies, causing water contamination and making them carrier agents of pathogenic (Prado; Miagostovich, 2014; Colantoni et al., 2016; Prez et al., 2018). Densely populated areas, mainly with a low HDI (Human Development Index), become more prone to the increase of waterborne diseases (Forgiarini et al., 2018). Among them, Mastadenoviruses (AdV) are observed in impacted environments and in large amounts of viral particles (between 105 and 1011 genomic copies per gram of feces), presenting high resistance to abiotic factors such as pH and temperature, and conventional methods of water and sewage treatment (Bofill-Mas et al., 2006; Bosch et al., 2006; Jiang et al., 2007; Griffin et al., 2008; Kitajima et al., 2012; Staggemeier et al., 2015; Prado et al., 2016; Rames et al., 2016; Sano et al., 2016). Therefore, viral detection and quantification can be used as potent water quality indicators (Murray et al., 2014; Rames et al., 2016; Haramoto et al., 2018). According to Karl and Trenberth (2003) and Derx et al. (2013) environmental conditions such as high precipitation rates and abrupt temperature changes are increasingly associated with the resistance conditions of viral agents dispersed in the hidric environment. In addition, densely populated areas become more predisposed to the increase in waterborne diseases. Thus, it is important to consider viral markers for water analysis after rainfall events to
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