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PERSISTENCE OF NEORICKETTSIAE HELMINTHOECA IN AN ENDOPARASITE OF THE PACIFIC SALMON.

Silver salmon (Oncorhynchus kisutch) infected with the metacercariae of the "salmon poisoning" fluke (Nanophyetus salmincola) remain infected after they have migrated to sea. Metacercariae remain viable in such salmon for at least 33(1/2) months. These metacercariae are capable of transmitting salmon disease (Neorickettsiae helminthoeca) to susceptible dogs throughout this period.

Animals↗

[Effect of nitroammofoska on the aldolase activity of the normal hemolymph in the mollusk Planorbarius banaticus and in trematode invasion].

The infection of Planorbarius banaticus with sporocysts of Cotylurus cornutus is accompanied by an increase in aldolase activity of molluscs' haemolymph of 1.2 fold. In solutions of nitroammofoska (0.1, 1 and 10 mg/1) the activity of this ferment in infected individuals increases much higher than in non-infected ones. This results in fast carbohydrate expenditures by molluscs, intermediate hosts of trematodes, and their death from exhaustion.

Animals↗