First Isolation of Virulent Tenacibaculum maritimum Isolates from Diseased Orbicular Batfish (Platax orbicularis) Farmed in Tahiti Island

Type Article
Date 2022-02
Language English
Author(s) Lopez Pierre1, Saulnier Denis1, Swarup-Gaucher Shital2, David Rarahu2, Lau Christophe2, Taputuarai RevahereORCID2, Belliard Corinne1, Basset CalineORCID1, Labrune VictorORCID1, Marie Arnaud3, Bernardet Jean François4, Duchaud EricORCID4
Affiliation(s) 1 : Ifremer, IRD, Institut Louis-Malardé, Université Polynésie française, EIO, Labex Corail, F-98719 Taravao, French Polynesia
2 : DRM, Direction des Ressources Marines, Fare Ute Immeuble Le caill, F-98713 Papeete, French Polynesia
3 : Labofarm Finalab Veterinary Laboratory Group, 4 rue Théodore Botrel, 22600 Loudéac, France
4 : Unité VIM, INRAE, Université Paris-Saclay, 78350 Jouy-en-Josas, France
Source Pathogens (2076-0817) (MDPI AG), 2022-02 , Vol. 11 , N. 2 , P. 131 (15p.)
DOI 10.3390/pathogens11020131
WOS© Times Cited 3
Note This article belongs to the Section Bacterial Pathogens
Keyword(s) tenacibaculosis, Tenacibaculum maritimum, Platax orbicularis, aquaculture, serotyping, 16S rRNA sequencing, multi-locus sequence analysis (MLSA), histology, qPCR diagnosis assay, experimental infection
Abstract

The orbicular batfish (Platax orbicularis), also called ‘Paraha peue’ in Tahitian, is the most important marine fish species reared in French Polynesia. Sudden and widespread outbreaks of severe ‘white-patch disease’ have occurred since 2011 in batfish farms one to three weeks after the transfer of juveniles from bio-secured hatcheries to lagoon cages. With cumulative mortality ranging from 20 to 90%, the sustainability of aquaculture of this species is severely threatened. In this study, we report for the first time the isolation from diseased batfish of several isolates belonging to the species Tenacibaculum maritimum, a major pathogen of many marine fish species. Histopathological analysis, an experimental bath challenge and a field monitoring study showed that T. maritimum is associated with ‘white-patch disease’. Moreover, molecular and serological analyses performed on representative isolates revealed some degree of genetic diversity among the isolates, a finding of primary importance for epidemiological studies and the development of management and control strategies such as vaccination.

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Lopez Pierre, Saulnier Denis, Swarup-Gaucher Shital, David Rarahu, Lau Christophe, Taputuarai Revahere, Belliard Corinne, Basset Caline, Labrune Victor, Marie Arnaud, Bernardet Jean François, Duchaud Eric (2022). First Isolation of Virulent Tenacibaculum maritimum Isolates from Diseased Orbicular Batfish (Platax orbicularis) Farmed in Tahiti Island. Pathogens, 11(2), 131 (15p.). Publisher's official version : https://doi.org/10.3390/pathogens11020131 , Open Access version : https://archimer.ifremer.fr/doc/00747/85898/