Certain characteristics of trypsin activity inhibition by cestodes Triaenophorus nodulosus and Eubothrium rugosum
The eﬀect of the extracts from cestodes T. nodulosus and E. rugosum inhabiting the intestines of pike and burbot, respectively, on the activity of commercial trypsin was studied. It was found that adding these extracts leads to an immediate and signiﬁcant decrease in the activity of trypsin solution. The impact level of the extracts depends on their dilution. The lower the dilution of the worm extract, the higher the level of trypsin activity inhibition. At the same time, the mass of the tapeworms have no signiﬁcant inﬂuence on their inhibitory eﬀect. Proteinase inhibitors protect the studied cestodes from the destructive eﬀects of host proteolytic enzymes.