You are here:
SYSTEMIC HEXAMITID (PROTOZOA: DIPLOMONADIDA) INFECTION IN SEAWATER PEN-REARED CHINOOK SALMON ONCORHYNCHUS TSSHAWYTSCHA
Citation:
Kent, M., J. Ellis, J. Fournie, S. Dawe, J. Bahshaw, AND D. Whitaker. SYSTEMIC HEXAMITID (PROTOZOA: DIPLOMONADIDA) INFECTION IN SEAWATER PEN-REARED CHINOOK SALMON ONCORHYNCHUS TSSHAWYTSCHA. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/069 (NTIS PB93169035), 1992.
Description:
A systemic infection with a diplomonad flagellate resembling Hexamita salmonis caused high mortality in chinook salmon, Oncorhynchus tshawytscha, reared at a seawater netpen farm in British Columbia, Canada. ffected fish were anemic and had swollen abdomens containing serosanguinous ascites and large blood clots. he most remarkable histological changes were found in the liver and kidney. ivers of affected fish showed edema, congestion, and inflammation. he renal interstitium was moderately hyperplastic, due to proliferation of hemoblasts. he systemic infection was transmitted in the laboratory to chinook by intraperitoneal injection, by gavage, and by waterborne exposure (in both fresh and sea water) to heavily infected ascites and tissue. he infection was also transmitted in fresh- and sea-water by cohabitation with infected chinook. ased on the ease of transmission of the parasite in both fresh- and sea-water, and the high mortality associated with the infection, this disease poses a potentially serious threat to the aquaculture of chinook salmon.
URLs/Downloads:
SYSTEMIC HEXAMITID (PROTOZOA: DIPLOMONADIDA) INFECTION IN SEAWATER PEN-REARED CHINOOK SALMON ONCORHYNCHUS TSSHAWYTSCHA