Dangerous parasitoses on the Southern Russian Far East under climate and demographic change

Recent distribution in the Southern Russian Far East of the most hazardous parasitoses caused by trematodes, cestodes and nematodes is demonstrated. Decelerating expansion of the trematode Clonorchis sinensis , an agent of clonorchiasis towards the southern Primorye Territory from the Amur River basin, that began 10-15 years ago, was revealed. A prognosis was made on the activation of natural foci of endemic paragonimosis. It has been established experimentally that freshwater gastropods belonging to endemic genus Parajuga and local species of the genus Stenothyra were resistant to infection by that trematode. These facts do not exclude possible introduction of the P . heterotremus on the Russian Far East using susceptible gastropods from other genera.