Main Title |
Systemic Hexamitid (Protozoa: Diplomonadida) Infection in Seawater Pen-Reared Chinook Salmon 'Oncorhynchus tshawytscha'. |
Author |
Kent, M. L. ;
Ellis, J. ;
Fournie, J. W. ;
Dawe, S. C. ;
Bagshaw, J. W. ;
|
CORP Author |
Environmental Research Lab., Gulf Breeze, FL. ;Department of Fisheries and Oceans, Nanaimo (British Columbia). Pacific Biological Station. ;Scanmar Seafood Ld., Sechelt (British Columbia). |
Publisher |
c1992 |
Year Published |
1992 |
Report Number |
EPA/600/J-93/069; |
Stock Number |
PB93-169035 |
Additional Subjects |
Protozoan infections ;
Fish diseases ;
Salmon ;
Mortality ;
Ascites ;
Kidney ;
Hyperplasia ;
Edema ;
Inflammation ;
Tissues(Biology) ;
Reprints ;
Hexamita salmonis ;
Onchorhynchus tshawytscha
|
Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB93-169035 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
11p |
Abstract |
A systemic infection with a hexamitid flagellate resembling Hexamita salmonis caused high mortality in chinook salmon Oncorhynchus tshawytscha reared at a seawater netpen farm in British Columbia, Canada. Affected fish were anemic and had swollen abdomens containing serosanguinous ascites and large blood clots. They also had an enlarged, mottled and congested liver, and an enlarged kidney and spleen. Numerous parasites were observed in the blood. The most remarkable histological changes were found in the liver and kidney. Livers of affected fish showed edema, congestion and inflammation. The renal interstitium was moderately hyperplastic due to proliferation of hemoblasts. The systemic infection was transmitted in the laboratory to chinook by intraperitoneal injection, by gavage of infected ascites and by waterborne exposure (in both fresh and sea water) with a mixture of infected ascites and tissue. The infection was also transmitted in fresh and sea water by cohabitation with infected chinook. Atlantic salmon were refractory to the infection. Based on the ease of transmission of the parasite in both fresh and sea water, and the high mortality associated with the infection, the disease poses a potentially serious threat to aquaculture of chinook salmon. (Copyright (c) Inter-Research 1992.) |
Supplementary Notes |
Prepared in cooperation with Department of Fisheries and Oceans, Nanaimo (British Columbia). Pacific Biological Station, and Scanmar Seafood Ld., Sechelt (British Columbia). |
Availability Notes |
Pub. in Diseases of Aquatic Organisms, v14 p81-89, 3 Nov 92. |
NTIS Title Notes |
Journal article. |
Title Annotations |
Reprint: Systemic Hexamitid (Protozoa: Diplomonadida) Infection in Seawater Pen-Reared Chinook Salmon 'Oncorhynchus tshawytscha'. |
Category Codes |
98F; 57N |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/04 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
314124382 |
Origin |
NTIS |
Type |
CAT |