alexa Validation of a qPCR assay for the detection of Ictalurid herpesvirus-2 (IcHV-2) in fish tissues and cell culture supernatants.
Agri and Aquaculture

Agri and Aquaculture

Fisheries and Aquaculture Journal

Author(s): Goodwin AE, Marecaux E

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Abstract Ictalurid herpesvirus-2 (IcHV-2) is a pathogen of cultured black bullhead, Ameiurus melas (Rafinesque), and has been shown to produce high mortality in experimental exposures of channel catfish, Ictalurus punctatus (Rafinesque). During acute infections, the virus grows readily in cell cultures but produces a cytopathic effect (CPE) similar to that of Ictalurid herpesvirus-1 (IcHV-1) and the channel catfish reovirus. We have developed a quantitative PCR assay that can be used to detect IcHV-2 in fish tissues and cell culture supernatants. The assay does not amplify other fish herpesviruses tested or host DNA. It is quantitative over a range of eight logs, and the limit of detection is <10 copies per reaction. In replicate assays carried out on different days, the coefficient of variability was 10\%. The best organs for the detection of acute IcHV-2 infections by our assay are the spleen and kidney. This assay should be useful for the diagnosis of IcHV-2 disease, the identification of syncytial CPEs in cell cultures, and for the detection of latent infections in carrier fish. This article was published in J Fish Dis and referenced in Fisheries and Aquaculture Journal

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