Virus

Host

Family/ genus

Virion morphology and size

Genome characteristics

Antigen *

Salmon alphaviruses (SAV)

Salmon,
Trout

Togaviridae/ Alphavirus

Enveloped, icosahedral

One, +ve sense, ssRNA, ~12 kb.

E2

Viral Nervous necrosis virus (VNNV)

Sea bass,
Sea Bream

Nodaviridae/Betanodavirus

Non enveloped, icosahedral

Two +ve-sense, ssRNA

C

Viral hemorrhagic septicemia virus (VHSV)

Trout, Turbot

Rhabdoviridae/ Novirhabdovirus

Enveloped, bullet shaped, ~70 nm X 180 nm.

One, -ve sense, ssRNA, ~11 kb

G

Infectious hematopoietic necrosis virus (IHNV)

Salmon, Trout, Char, Cod, Pike, Sturgeon

Rhabdoviridae/ Novirhabdovirus

Enveloped, bullet shaped, ~170 nm X 80 nm.

One, -ve sense, ssRNA, ~11 kb

G

Spring viremia  carp virus (SVCV)

Carp, European catfish or wels, rainbow trout.

Rhabdoviridae/ Vesiculovirus

Enveloped, bullet shaped

One, -ve sense, ssRNA, ~11 kb

G

Infectious salmon anemia virus (ISAV)

Atlantic salmon, Coho salmon, Pollock, Cod, Brown trout, Sea Trout

Orthomyxoviridae/ Isavirus

Enveloped, polymorphic, 100-130 nm diameter

Eight, -ve sense, ssRNA

HE

Infectious pancreatic necrosis virus (IPNV)

Salmon, trout

Birnaviridae/ Aquabirnavirus

Non enveloped, icosahedral, 60 nm size

Two, dsRNA, ~3.1 kb and ~2.8 kb and

VP2

E2, fusion protein; C, capsid protein; G, glycoprotein; HE, hemaglutinin-esterase; VP2, viral protein 2 * Target: Major protein involved in neutralization: E2, fusion protein; C, capsid protein; G, glycoprotein; HE, hemaglutinin-esterase; VP2, viral protein 2
Table 1: Major viral pathogens of farmed finfish.