107 Marco Alésio Figueiredo Pereira, Tatiana Moraes da Silva Heck, Fabiano Costa de Oliveira, Rodrigo Staggemeier, Daniela Müller de Quevedo e Sabrina Esteves de Matos Almeida samples. Corroborating this affirmation, Rigotto et al. (2011) evaluated the survival rate of AdV Type 2 and 41 (AdV2 e AdV41) in samples of 50 mL of surface and groundwater at different temperatures. The authors concluded that the concentrations of AdV2 and AdV41 were relatively stable in all waters at 10 °C for at least 160 days and in some instances up to 301 days. However, when the samples were incubated at a temperature of 19 ºC, there was an approximate reduction of 90% in both viruses after 160 days. Similarly, Enriquez et al. (1995) evaluated the survival time of HAdV-F (40 and 41) in tap water, at a temperature of 15 ºC, in which they detected a 99%drop in the presence of AdVs, for a period of 87 to 124 days. When submitted to a temperature of 23 ºC the period was 60 to 84 days. This same experiment was carried out using sea water, with a temperature of 23 ºC the survival period was 77 and 85 days for HAdV-F (40 and 41), respectively. The mean water temperature data used in this study came from historical series of fluviometric stations (Table 1). As from the correlation analysis, a strong negative correlation between temperature and HAdV-C and moderate for HAdV-F can be observed, being found that the lowest concentrations were observed in samples collected at the end and beginning of summer, respectively, consistent with those presented by previous research (Corsi et al., 2014; Lenaker et al., 2017) in which the colder months provide the presence of HAdV in water bodies. Micminn et al. (2020) in a study conducted from samples collected at Lake Harsha, Ohio, USA, exposed their samples containing HAdV and somatic colipphages and F+ to ambient sunlight and UV irradiation associated with controlled temperature around 16 ºC, observed that the high incidence of sunlight provides viral deterioration. It is assumed that in the months when the solar incidence is higher and, consequently, the higher temperature causes viral decay in aquatic environments. From the spatial analysis, considering the HAdV-C (2 and 5), was observed that its greatest detection occurred in points 1, 3 and 4 in the collection campaign of 06/27/2016, however, in the other three campaigns the presence of this AdV was detected in almost all points of this research, despite being in lower concentration. For HAdV-F (40 and 41) its presence was detected at fewer points, however its
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