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Diseases of Aquatic Organisms

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DAO 127:19-27 (2017)  -  DOI:

Molecular investigations of outbreaks of Perch perhabdovirus infections in pike-perch

Laurent Bigarré1, Georges Plassiart2,†, Claire de Boisséson3, Laurane Pallandre1, Françoise Pozet4, Yannick Ledoré5, Pascal Fontaine5, François Lieffrig

1ANSES, Laboratoire Ploufragan-Plouzané, 29280 Plouzané, France
2Laboratoire anatomie pathologique vétérinaire, 57006 Metz, France
3ANSES, Laboratoire Ploufragan-Plouzané, 22440 Ploufragan, France
4LDA39, 39802 Poligny, France
5Université de Lorraine, UR AFPA, USC INRA340, 54505 Vandoeuvre-les-Nancy, France
6CER Groupe, Laboratoire de pathologies des poissons, 6900 Marche-en-Famenne, Belgium
*Corresponding author:

ABSTRACT: In 2016, a total of 5 massive mortality episodes each affecting hundreds of thousands of pike-perch Sander lucioperca larvae occurred at 2 sites in 2 Western European countries. For each episode, perhabdoviruses related to the perch rhabdovirus (PRV) were detected in samples, using either PCR or cell culture combined with PCR. The sequences of the glycoprotein (g), phosphoprotein (p) and nucleoprotein (n) genes of these samples demonstrated that 2 different genotypes were present at 1 site, each associated with 1 of the 3 episodes. At the other site, a single genotype was associated with the 2 outbreaks. Furthermore, this genotype was strictly identical to 1 genotype involved in the outbreaks of the first site, strongly suggesting a common origin for these 2 viruses. The common origin was confirmed a posteriori because some larvae introduced to both sites had exactly the same geographic origin in Eastern Europe. Taken together, the molecular and epidemiological data suggest that both horizontal and vertical transmission of 2 distinct strains of perhabdoviruses were involved in the various outbreaks affecting pike-perch.

KEY WORDS: Pike-perch · Sander lucioperca · Perch rhabdovirus · Percidae · Virus · Epizooty

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Cite this article as: Bigarré L, Plassiart G, de Boisséson C, Pallandre L and others (2017) Molecular investigations of outbreaks of Perch perhabdovirus infections in pike-perch. Dis Aquat Org 127:19-27.

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