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Article Dans Une Revue Journal of Invertebrate Pathology Année : 2019

First detection of Ostreid herpesvirus 1 in wild Crassostrea gigas in Argentina

Elena S. Barbieri
  • Fonction : Auteur
Cintia D. Medina
  • Fonction : Auteur
Nuria Vázquez
  • Fonction : Auteur
Carla Fiorito
  • Fonction : Auteur
Antonela Martelli
  • Fonction : Auteur
Andrés Wigdorovitz
  • Fonction : Auteur
Evangelina Schwindt
  • Fonction : Auteur
Viviana Parreño
  • Fonction : Auteur
Pedro J Barón
  • Fonction : Auteur

Résumé

Ostreid herpesvirus 1 (OsHV-1) is a DNA virus of the genus Ostreavirus (Malacoherpesviridae family, Herpesvirales order). Worldwide, OsHV-1 and its microvariants have been associated with increased mortality of Pacific oysters, Crassostrea gigas. Adult asymptomatic oysters also have shown a high prevalence of viral infection. As a consequence, surveillance is needed to better describe OsHV-1 diversity, pathogenicity, clinical signs, and geographical distribution. We examined Crassostrea gigas sampled in October 2017 from the inner zone of the Bahía Blanca Estuary, Argentina, and found that 8 of 30 specimens (26.7%) presented macroscopic lesions in mantle tissues. Histological analysis revealed abnormal presentation of mantle epithelial cells and connective tissues. Conventional and real-time PCR conducted on the oyster samples revealed 70% to be positive for presence of OsHV-1 DNA. The nucleotide sequence of the amplicon obtained from one sample using the primer pair IA1/IA2 (targeting ORF 42/43) was 99% identical to OsHV-1 reference as well as µVar strains B and A (KY271630, KY242785.1), sequenced from France and Ireland. This finding represents the first detection of OsHV-1 DNA in a wild population of C. gigas in Argentina in association with gross mantle lesions.
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Dates et versions

hal-04202350 , version 1 (11-09-2023)

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Elena S. Barbieri, Cintia D. Medina, Nuria Vázquez, Carla Fiorito, Antonela Martelli, et al.. First detection of Ostreid herpesvirus 1 in wild Crassostrea gigas in Argentina. Journal of Invertebrate Pathology, 2019, 166, 107222 (6p.). ⟨10.1016/j.jip.2019.107222⟩. ⟨hal-04202350⟩
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