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. 1973 Aug;8(2):249–254. doi: 10.1128/iai.8.2.249-254.1973

Immunofluorescent Study of the Replication of Infectious Pancreatic Necrosis Virus in Trout and Atlantic Salmon Cell Cultures

Donald Piper a, Bruce L Nicholson a, James Dunn a,1
PMCID: PMC422840  PMID: 4199156

Abstract

Cell cultures of trout gonad tissue (RTG-2) and Atlantic salmon heart, kidney, liver, and spleen tissue were inoculated with 50 50% tissue culture infective doses (TCID50) of infectious pancreatic necrosis (IPN) virus per cell, and the titer of cell-associated and released virus was determined from 2 to 16 h postinoculation (PI). Cover slips were collected over the same period and stained for IPN viral antigen by the direct immunofluorescent (FA) technique. Viral replication was detected after a latent period of approximately 2 to 4 h and reached a peak titer of 108.2 to 108.4 TCID50 per ml at 8 to 10 h PI. The release of virus was more rapid in Atlantic salmon cells than in RTG-2 cells. Viral antigen was first detected by FA from 3 to 4 h PI. Approximately 75 to 80% of the cells contained antigen in the cytoplasm 9 to 11 h PI. The direct FA technique was found to be a sensitive method for detecting IPN virus in infected cells. Three strains of IPN virus were tested for serological cross reactions by FA and virus neutralization tests.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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