Passage of infectious pancreatic necrosis virus (IPNV) througn invertebrates in an aquatic food chain

ABSTWCT: Infectious pancreatic necrosis virus (IPNV) was reisolated from particles containing faeces and pseudofaeces of scallops Pecten maximus after IPNV bath and injection challenges, and from prawns Pandalus boreahs and Palaemon elegans which had grazed upon dead IPNV-contaminated scallops.Virus was also reisolated from prawns which were physically isolated from the scallops, but in contact with IPNV-contaminated scallop faeces and pseudofaeces.Virus titers of the prawns decreased rapidly after the contaminated food source was removed.IPNV was not detected in brown trout Salrno trutta which were fed prawns which contained 102.' to 103.' TCIDSO g-l wet weight, but was transmitted to 2 of 8 trout which were fed food pellets with a virus titer of ~O ~C I D , , g-' wet weight.