“…The generally accepted model for studying opisthorchiasis caused by O. felineus and O. viverrini is the Syrian hamster Mesocricetus auratus (Waterhouse, 1839) (Fig. 2D-G) (Sripa et al, 2012a;Mordvinov et al, 2017bMordvinov et al, , 2021Pakharukova et al, 2018Pakharukova et al, , 2019aPakharukova et al, , 2019bPakharukova et al, , 2019cPakharukova et al, , 2021Arunsan et al, 2019;Zaparina et al, 2021). These animals are susceptible to infection by liver flukes, which is not surprising because the main reservoir animal of O. felineus is the muskrat, of the Cricetidae family closely related to Syrian hamsters (Fedorov, 1979;Fedorov et al, 1989).…”