“…This is an artificial reservoir that was constructed in 1959 to provide recreational activities in Brasília (Monteiro and Dias, 1980;PadovesiFonseca et al, 2009). All procedures, such as collecting thiarids, detecting larval trematode, the experimental infection of fish Poecilia reticulata (Peters, 1859), the infection of mice (AKR/J strain), metacercariae recovery, and the fixation and colouration of the obtained parasites were performed as described by Pinto and Melo (2010a). Trematode larvae were found in 16 snails (33%) and were preliminarily identified as Pleurolophocercous cercariae.…”