Infectious haemolytic anaemia causes jaundice outbreaks in seawater-cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile
Author
dc.contributor.author
Smith Schuster, Pedro
es_CL
Author
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Larenas Herrera, Julio
es_CL
Author
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Contreras Vásquez, Jorge
es_CL
Author
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Cassigoli, J.
es_CL
Author
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Venegas, C.
es_CL
Author
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Rojas, M.E.
es_CL
Author
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Guajardo Vidal, Álvaro
es_CL
Author
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Pérez, S.
es_CL
Author
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Díaz, S.
Admission date
dc.date.accessioned
2014-01-09T20:18:54Z
Available date
dc.date.available
2014-01-09T20:18:54Z
Publication date
dc.date.issued
2006-07-13
Cita de ítem
dc.identifier.citation
Journal of Fish Diseases 2006, 29, 709–715
en_US
Identifier
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https://repositorio.uchile.cl/handle/2250/122511
General note
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Artículo de publicación ISI.
en_US
Abstract
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In the last 9 years, epizootics of an icterus condition
has affected coho salmon, Oncorhynchus kisutch
(Walbaum), reared in seawater cages in southern
regions of Chile. At necropsy, fish from field cases
exhibited signs of jaundice accompanied by pale
light-brown livers and dark spleens. Histopathological
and haematological results indicated that
these fish presented haemolytic anaemia. After
microbiological examination no bacterial or viral
agents could be identified as aetiological agents of
this disease. In an infectivity trial, coho salmon,
Atlantic salmon, Salmo salar L., and rainbow trout,
Oncorhynchus mykiss (Walbaum), were inoculated
intraperitoneally with a filtrate of an organ homogenate
(0.45 lm) from a diseased coho salmon and
held for 60 days in tanks supplied with fresh water.
The disease was only reproduced in coho salmon in
which mortalities, beginning at day 23 postinoculation
(p.i.), reached a cumulative value of
24% at day 27 p.i. This condition was transmitted
to non-inoculated cohabiting coho salmon suggesting
that it is a waterborne disease. Thus, this
icteric condition is caused by an infectious form of
haemolytic anaemia, probably of viral aetiology,
and coho salmon are more susceptible than either
Atlantic salmon or rainbow trout.