Sampling sites in the Atibaia River, Campinas, São Paulo, Brazil. a Brazil's map highlighting São Paulo state; b Metropolitan Region of Campinas and the sampling site coordinates at Atibaia River; c and d details of surface water col-

Contexts in source publication

Context 1

... from the surface water and sediment. Water samples (5 L) were harvested in previous sterilized plastic bottles (30 cm depth, in the middle of the river course). Sediment samples (500 mL) were collected with the aid of an Ekman dredge, which has the advantage of preserving the sediment-water interface and not disturbing the bottom sediments ( Fig. 1), obtaining approximately 5 cm in the sedimentary column (Figueiredo & Brehme, ...

Context 2

... water matrices, several studies have reported variations in efficiency recoveries. Cryptosporidium oocysts are difficult to detect using the techniques routinely employed in environmental analysis, notably due to the small number of such oocysts in the water matrix (Bilung et al., 2017). The recovery for those pathogenic protozoa is still a challenge, due to the presence of the inherent characteristics of environmental matrices, which are considered to be complex (Giglio & Sabogal-Paz, 2018;Sammarro Silva & Sabogal-Paz, 2020). ...