Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile
Abstract 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. Hi...
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crwiley:10.1111/j.1365-2761.2006.00766.x 2024-09-15T17:56:10+00:00 Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile Smith, P A Larenas, J Contreras, J Cassigoli, J Venegas, C Rojas, M E Guajardo, A Pérez, S Díaz, S 2006 http://dx.doi.org/10.1111/j.1365-2761.2006.00766.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.2006.00766.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.2006.00766.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Fish Diseases volume 29, issue 12, page 709-715 ISSN 0140-7775 1365-2761 journal-article 2006 crwiley https://doi.org/10.1111/j.1365-2761.2006.00766.x 2024-07-23T04:15:29Z Abstract 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 μ m) 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 post‐inoculation (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. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Journal of Fish Diseases 29 12 709 715 |
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Wiley Online Library |
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language |
English |
description |
Abstract 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 μ m) 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 post‐inoculation (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. |
format |
Article in Journal/Newspaper |
author |
Smith, P A Larenas, J Contreras, J Cassigoli, J Venegas, C Rojas, M E Guajardo, A Pérez, S Díaz, S |
spellingShingle |
Smith, P A Larenas, J Contreras, J Cassigoli, J Venegas, C Rojas, M E Guajardo, A Pérez, S Díaz, S Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile |
author_facet |
Smith, P A Larenas, J Contreras, J Cassigoli, J Venegas, C Rojas, M E Guajardo, A Pérez, S Díaz, S |
author_sort |
Smith, P A |
title |
Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile |
title_short |
Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile |
title_full |
Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile |
title_fullStr |
Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile |
title_full_unstemmed |
Infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, Oncorhynchus kisutch (Walbaum), in Chile |
title_sort |
infectious haemolytic anaemia causes jaundice outbreaks in seawater‐cultured coho salmon, oncorhynchus kisutch (walbaum), in chile |
publisher |
Wiley |
publishDate |
2006 |
url |
http://dx.doi.org/10.1111/j.1365-2761.2006.00766.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2761.2006.00766.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2761.2006.00766.x |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Journal of Fish Diseases volume 29, issue 12, page 709-715 ISSN 0140-7775 1365-2761 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2761.2006.00766.x |
container_title |
Journal of Fish Diseases |
container_volume |
29 |
container_issue |
12 |
container_start_page |
709 |
op_container_end_page |
715 |
_version_ |
1810432369378721792 |