Report and genetic identification of Amyloodinium ocellatum in a sea bass (Dicentrarchus labrax) broodstock in Portugal

•Report of an amyloodiniosis outbreak in a sea bass broodstock in Portugal.•Molecular identification of A. ocellatum.•Gills epithelial hyperplasia, hypertrophy and lamellar fusion were associated with the presence of the parasite.•Colpodellids may be used as a potential agents to control A. ocellatu...

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Bibliographic Details
Published in:Aquaculture reports 2019-07, Vol.14, p.100191, Article 100191
Main Authors: Marques, Cátia L., Medeiros, Ana, Moreira, Márcio, Quental-Ferreira, Hugo, Mendes, Ana C., Pousão-Ferreira, Pedro, Soares, Florbela
Format: Article
Language:English
Subjects:
Amyloodinium ocellatum
Broodstock
Colpodellids
Dicentrarchus labrax
Fish parasites
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Summary:•Report of an amyloodiniosis outbreak in a sea bass broodstock in Portugal.•Molecular identification of A. ocellatum.•Gills epithelial hyperplasia, hypertrophy and lamellar fusion were associated with the presence of the parasite.•Colpodellids may be used as a potential agents to control A. ocellatum infestations. In this paper we report a case of amyloodiniosis in a sea bass (Dicentrarchus labrax) broodstock in Portugal. Microscopic examination of gill filaments showed the presence of trophonts while histological observation revealed gills epithelial hyperplasia, hypertrophy and lamellar fusion of secondary lamellae. The amplification and sequencing of the small subunit ribosomal RNA gene allowed the identification of the parasite as Amyloodinium ocellatum. It was also possible to amplify a partial sequence of ribosomal RNA from a Colpodellid, a predator of protists.
ISSN:2352-5134
2352-5134
DOI:10.1016/j.aqrep.2019.100191