Nodavirus colonizes and replicates in the testis of gilthead seabream and European sea bass modulating its immune and reproductive functions
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AuthorsValero, Y. (Yulema); Arizcun-Arizcun, M. (Marta); Esteban, M.A. (M. Ángeles); Bandín, I. (Isabel); Olveira, J.G. (José G.); Patel, S. (Sonal); Cuesta, A. (Alberto); Chaves-Pozo, E. (Elena)
KeywordsSparus aurata, Dicentrarchus labrax, NNV, gonad, immune response
Viruses are threatening pathogens for fish aquaculture. Some of them are transmitted through gonad fluids or gametes as occurs with nervous necrosis virus (NNV). In order to be transmitted through the gonad, the virus should colonize and replicate inside some cell types of this tissue and avoid the subsequent immune response locally. However, whether NNV colonizes the gonad, the cell types that are infected, and how the immune response in the gonad is regulated has never been studied. We have demonstrated for the first time the presence and localization of NNV into the testis after an experimental infection in the European sea bass (Dicentrarchus labrax), and in the gilthead seabream (Sparus aurata), a very susceptible and an asymptomatic host fish species, respectively. Thus, we localized in the testis viral RNA in both species using in situ PCR and viral proteins in gilthead seabream by immunohistochemistry, suggesting that males might also transmit the virus. In addition, ...
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