Differential diagnostic table for finfish

Aquatic Animal Diseases Significant to Australia - Identification Field Guide 3rd edn

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Please note: one or more of the disease signs described may be present with disease. Disease, however, may still be present in the absence of the gross or clinical signs described here.

Diseases of finfish | Diseases of molluscs | Diseases of crustaceans

green dot: indicates it may be seen in all life stages may be seen in all life stages

star shape indicates seen in adults only typically seen in adults only

black square dot indicates that this is typically seen in juveniles onlytypically seen in juveniles only

 

 table header: distinctive faecal castes table header no visible changes table header: lethargy table header: gill anaemia table header: swollen stomach/ascites table header pop eye and or ocular haemorrhage table header:external haemorrhages table header: internal haemorrhages table header: whirling/corkscrew behaviour table header: erratic swimming/jumping from water/scraping or other motor skill disfunction table header:skin/body lesions/ulcers table header:gathering at surface/edges of waterbody table header:swollen or colour change of internal organs table header: white spots on external surface table header: secondary bacterial/fungal/parasitic infection table header: derformities  table header: external haemorrhages  table header high species specificity   table header: ulceration/lesions in tissue  table header: reduced feeding  table header: mass mortality table header: moderate mortality Differential alternatives
Possible disease or disease agent responsible
Viral diseases of finfish
Channel catfish virus disease          black square dot indicates that this is typically seen in juveniles only  black square dot indicates that this is typically seen in juveniles only  black square dot indicates that this is typically seen in juveniles only  black square dot indicates that this is typically seen in juveniles only                    black square dot indicates that this is typically seen in juveniles only  black square dot indicates that this is typically seen in juveniles only    black square dot indicates that this is typically seen in juveniles only   ESC
Epizootic haematopoietic necrosis green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages black square dot indicates that this is typically seen in juveniles only

green dot: indicates it may be seen in all life stages

      green dot: indicates it may be seen in all life stages    green dot: indicates it may be seen in all life stages black square dot indicates that this is typically seen in juveniles only 

green dot: indicates it may be seen in all life stages

 VHS / IHN
Grouper iridoviral disease green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

    green dot: indicates it may be seen in all life stages  green dot: indicates it may be seen in all life stages      green dot: indicates it may be seen in all life stages VER
Infectious haematopoietic necrosis black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only

black square dot indicates that this is typically seen in juveniles only

   black square dot indicates that this is typically seen in juveniles only        black square dot indicates that this is typically seen in juveniles only VHS / IPN / ISA / ERD / WD
Infectious pancreatic necrosis black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only   black square dot indicates that this is typically seen in juveniles only        black square dot indicates that this is typically seen in juveniles only IHN / VHS / ISA
Infectious salmon anaemia green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

      green dot: indicates it may be seen in all life stages       IPN / IHN / VHS
Koi herpesvirus disease green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

      green dot: indicates it may be seen in all life stages  green dot: indicates it may be seen in all life stages    green dot: indicates it may be seen in all life stages SVC / VHS / EUS
Red sea bream iridoviral disease green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

            green dot: indicates it may be seen in all life stages EHN
Spring viraemia of carp green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages             ESC / atypical A salmonicida / ERD / KHVD
Viral encephalopathy and retinopathy black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only    black square dot indicates that this is typically seen in juveniles only      black square dot indicates that this is typically seen in juveniles only   Nil (histology required)
Viral haemorrhagic septicaemia

black square dot indicates that this is typically seen in juveniles only

 black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only black square dot indicates that this is typically seen in juveniles only   black square dot indicates that this is typically seen in juveniles only         black square dot indicates that this is typically seen in juveniles only IHN / IPN / ISA / KHVD / furunculosis
Bacterial diseases of finfish
Bacterial kidney disease

star shape indicates seen in adults only

star shape indicates seen in adults only

star shape indicates seen in adults only

star shape indicates seen in adults only

star shape indicates seen in adults only

             Nil (histology required)
Enteric red mouth disease (Yersinia ruckeri) - Hagerman green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages   green dot: indicates it may be seen in all life stages          VHS / IHN / SVC / ISA
Enteric  septicaemia of catfish green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages    green dot: indicates it may be seen in all life stages     green dot: indicates it may be seen in all life stages    CCVD
Furunculosis green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

    green dot: indicates it may be seen in all life stages      green dot: indicates it may be seen in all life stages   VHS / atypical A salmonicida
Infection with Aeromonas salmonicida - atypical strains green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages SVC / CCVD / EUS
Piscirickettsiosis green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages    green dot: indicates it may be seen in all life stages      star shape indicates seen in adults only   Nil (histology required)
Fungal diseases of finfish
Epizootic ulcerative syndrome green dot: indicates it may be seen in all life stages

green dot: indicates it may be seen in all life stages

            green dot: indicates it may be seen in all life stages Nil (histology required)
Parasitic diseases of finfish
Gyrodactylosis

green dot: indicates it may be seen in all life stages

 green dot: indicates it may be seen in all life stages green dot: indicates it may be seen in all life stages    green dot: indicates it may be seen in all life stages         Many (histology required)
Whirling disease

black square dot indicates that this is typically seen in juveniles only

black square dot indicates that this is typically seen in juveniles only

  star shape indicates seen in adults only  black square dot indicates that this is typically seen in juveniles only  green dot: indicates it may be seen in all life stages      black square dot indicates that this is typically seen in juveniles only VHS
Last reviewed:
06 Oct 2009
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