Abundance of Opisthorchis felineus Metacercariae in cyprinid fish in the middle Ob River basin (Tomsk region, Russia)

Infection with the liver fluke, Opisthorchis felineus, caused by consumption of infected raw or undercooked cyprinid fish is common in humans and carnivores middle Ob River basin (Tomsk region, Russia) can lead to diseases humans. The goal this study was status infection O. felineus metacercariae order assess role human population basin. Of 14 Cyprinidae species recorded basin, we examined 6 for prevalence intensity metacercariae. Five these (Leuciscus idus, Leuciscus leuciscus, Rutilus rutilus, Abramis brama, Carassius gibelio) are commercial value, while bleak an object amateur fishing. In addition, conducted a survey habits as part community-based cross-sectional rural Shegarsky district, Tomsk Russian Federation. were observed muscles all except Prussian carp. ide main source (prevalence infection, 100%, intensity, 50.5 per fish) dace Tom (91.1% 12.7 metacercariae). Although two alien (bream bleak) susceptible metacercariae, roach did not exceed 3%. increased age size. characteristics different water flows different. account on average 69.8% harvested region. According epidemiological survey, among 600 participants, 87.5% (n = 525) respondents consumed river fish, most popular being cyprinids including carp, dace, bream, followed pike perch. Thus, epizootological state adverse respect opisthorchiasis, indicated high rates fluke which abundant value. An extremely suggests strong transmission cycle rate from and/or animal reservoir hosts snails fish. addition treating humans, there should be focus identifying potential reduce subsequent Furthermore, since determined presence such diet, they included dietary change campaign eliminating