Changes

Also Known As: '''''Fin Rot — Peduncle Disease — CWD'''''

Also Known As: '''''Fin Rot — Tail Rot — Peduncle Disease — CWD — Rainbow Trout Fry Mortality Syndrome'''''

Caused by: '''''Flavobacterium psychrophilum''''' previously known as: ''Cytophaga psychrophila — Flexibacter psychrophilus''

Caused by: '''''Flavobacterium psychrophilum''''' previously known as: ''Cytophaga psychrophila — Flexibacter psychrophilus''

Most fishes worldwide are susceptible and the organism is '''ubiquitous.'''

Most fishes worldwide are susceptible and the organism is '''ubiquitous.'''

Cultured salmon species are the most frequently affected: '''brook trout, rainbow trout, brown trout, lake trout, walleye, whitefish, carp, dace and suckers.'''

Cultured salmon species are the most frequently affected. Susceptible fish include: '''brook trout, rainbow trout, brown trout, lake trout, walleye, whitefish, carp, dace and suckers.'''

==Clinical Signs==

==Clinical Signs==

'''Internal, systemic infection''' can also be a sequel of CWD.  

'''Internal, systemic infection''' can also be a sequel of CWD.  

In '''Rainbow Trout Fry Syndrome''', acute disease is usual and '''mortality can approach 60%''' which is devastating in the commonly affected populations of tens of thousands of young fish. Shortly before death, fish are lethargic, have '''darkened skin, inappetance and demonstrate exopthalmos'''.  

In '''Rainbow Trout Fry Syndrome''', acute disease is usual and '''mortality can approach 60%''' which is devastating in the commonly affected populations of tens of thousands of young fish. Shortly before death, fish are lethargic, have '''darkened skin, inappetance and demonstrate [[Exopthalmos - Fish|exopthalmos]]'''.  

Salmonid fish can also acquire a '''chronic form of CWD characterised by erratic “corkscrew” swimming, blackened tails and spinal deformities'''.<ref> Blazer, V., Stark, K., Starliper, C (1996) '''Unusual histologic manifestations of ''Flexibacter psychrophila'' in hatchery salmonids'''. In: 21st Annual Eastern Fish Health Workshop. ''Gloucester Point, Virginia'', 5-6 September, 10</ref> This may follow recovery from typical CWD.

Salmonid fish can also acquire a '''chronic form of CWD characterised by erratic “corkscrew” swimming, blackened tails and spinal deformities'''.<ref> Blazer, V., Stark, K., Starliper, C (1996) '''Unusual histologic manifestations of ''Flexibacter psychrophila'' in hatchery salmonids'''. In: 21st Annual Eastern Fish Health Workshop. ''Gloucester Point, Virginia'', 5-6 September, 10</ref> This may follow recovery from typical CWD.

==Treatment==

==Treatment==

'''Quaternary ammonium compounds''' can be delivered in a static bah or flow through system for infected adult fish and fry.

'''Quaternary ammonium compounds''' can be delivered in a static bath or flow through system for infected adult fish and fry. '''Potassium permanganate''', copper sulphate and hydrogen peroxide can be applied externally but they can be toxic at high concentrations.

'''Terramycin''' can be added to feed as an alternative for adults, fry and broodstock. This can also be used preventively. Some resistance is emerging however.  

'''Terramycin''' can be added to feed as an alternative for adults, fry and broodstock. This can also be used preventively. Some resistance is emerging however.

==Control==

==Control==

{{Learning

{{Learning

|flashcards = [[Cold Water Disease Flashcards]]

|flashcards = [[Cold Water Disease Flashcards]]

}}

}}

==References==

==References==

<references/>

<references/>

{{CABI source

{{CABI source

|datasheet = [http://www.cabi.org/ahpc/Default.aspx?site=160&page=2144&LoadModule=datasheet&CompID=3&dsID=87862 cold-water disease] and [http://www.cabi.org/ahpc/?compid=3&dsid=82793&loadmodule=datasheet&page=2144&site=160 ''Flavobacterium psychrophilum'']

|datasheet = [http://www.cabi.org/ahpc/Default.aspx?site=160&page=2144&LoadModule=datasheet&CompID=3&dsID=87862 cold-water disease] and [http://www.cabi.org/ahpc/?compid=3&dsid=82793&loadmodule=datasheet&page=2144&site=160 ''Flavobacterium psychrophilum'']

|date =10 July 2011

|date =10 July 2011

}}

}}

[[Category:Fish Diseases]]

[[Category:Fish Diseases]]

[[Category:CABI Expert Review]]

[[Category:CABI Expert Review Completed]][[Category:CABI AHPC Pages]]