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Natural and Laboratory Transmission of the Marine Myxozoan Parasite Kudoa thyrsites to Atlantic Salmon
Author(s) -
Moran J. D. W.,
Whitaker D. J.,
Kent M. L.
Publication year - 1999
Publication title -
journal of aquatic animal health
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 52
eISSN - 1548-8667
pISSN - 0899-7659
DOI - 10.1577/1548-8667(1999)011<0110:naltot>2.0.co;2
Subject(s) - myxosporea , myxozoa , salmo , biology , parasite hosting , fishery , oncorhynchus , epizootiology , zoology , seawater , coelom , aquatic animal , salmonidae , fish <actinopterygii> , ecology , anatomy , world wide web , computer science , virology
Experiments were conducted to evaluate routes of transmission and subsequent development of Kudoa thyrsites (Myxozoa: Myxosporea) in Atlantic salmon Salmo salar. Atlantic salmon that were held for a 2‐week exposure period at the seawater net‐pen site and then transferred to freshwater tanks developed K. thyrsites infections as evidenced by the presence of myxospores in the somatic musculature at 3 months postexposure. Attempts to transmit the parasite directly from fish to fish by intubation of fresh myxospores were unsuccessful. However, the parasite was transmitted to Atlantic salmon by intraperitoneal injection of blood collected from a coho salmon Oncorhynchus kisutch infected with K. thyrsites. The waterborne infective stage of K. thyrsites was not removed by filtration of seawater entering the tanks at the Pacific Biological Station.