Native parasite affecting an introduced host in aquaculture: cardiac henneguyosis in the red seabream Pagrus major Temminck & Schlegel (Perciformes: Sparidae) caused by Henneguya aegea n. sp. (Myxosporea: Myxobolidae).
Animals
Aquaculture
Blood Vessels
/ parasitology
DNA, Protozoan
/ chemistry
Diagnosis, Differential
Fish Diseases
/ parasitology
Greece
Heart Atria
/ parasitology
Heart Ventricles
/ parasitology
Kidney
/ parasitology
Liver
/ parasitology
Mediterranean Sea
Microscopy, Electron, Scanning
/ veterinary
Myxozoa
/ classification
Parasitic Diseases, Animal
/ parasitology
Perciformes
/ parasitology
Phylogeny
Spores, Protozoan
/ genetics
Aquaculture
Exotic species
Henneguya aegea n. sp.
Myxosporea
Pagrus major
Parasite
Journal
Parasites & vectors
ISSN: 1756-3305
Titre abrégé: Parasit Vectors
Pays: England
ID NLM: 101462774
Informations de publication
Date de publication:
14 Jan 2020
14 Jan 2020
Historique:
received:
21
05
2019
accepted:
04
01
2020
entrez:
16
1
2020
pubmed:
16
1
2020
medline:
22
10
2020
Statut:
epublish
Résumé
Henneguya Thélohan, 1892 (Myxobolidae) is one of the most species-rich genera of myxosporean parasites infecting fish. Although common in nature, there are few reports of these parasites causing important disease in aquaculture. In this paper, we describe a new species of Henneguya infecting Pagrus major (Temminck & Schlegel), a fish host introduced to the Mediterranean Sea from Japan in the late 1980s. Large plasmodia of the parasite were found in the bulbus arteriosus and in the ventricle of the infected fish. Spores were found mainly in the kidney and heart and were accompanied by melanized macrophages or vascular intimal proliferation mixed with a mild non-suppurative response, respectively. Comparisons of morphometric data for spore and polar capsule length and width, suggest a unique combination of features in the newly described species. Molecular analysis, based on 18S rDNA sequence of the parasite, followed by phylogenetic analysis, indicated that the parasite described here is a novel species of Henneguya, clustered with the marine congeneric species. Henneguya aegea n. sp. infects in aquaculture P. major, a host introduced as eggs to the Mediterranean from Japan. Despite the high host specificity of the myxobolid parasites, H. aegea n. sp. seems to be able to use P. major as a host and propagate successfully, causing morbidity and mortality. This could result in spillback of the new species from high density cultured non-native P. major to native fish hosts.
Sections du résumé
BACKGROUND
BACKGROUND
Henneguya Thélohan, 1892 (Myxobolidae) is one of the most species-rich genera of myxosporean parasites infecting fish. Although common in nature, there are few reports of these parasites causing important disease in aquaculture. In this paper, we describe a new species of Henneguya infecting Pagrus major (Temminck & Schlegel), a fish host introduced to the Mediterranean Sea from Japan in the late 1980s.
RESULTS
RESULTS
Large plasmodia of the parasite were found in the bulbus arteriosus and in the ventricle of the infected fish. Spores were found mainly in the kidney and heart and were accompanied by melanized macrophages or vascular intimal proliferation mixed with a mild non-suppurative response, respectively. Comparisons of morphometric data for spore and polar capsule length and width, suggest a unique combination of features in the newly described species. Molecular analysis, based on 18S rDNA sequence of the parasite, followed by phylogenetic analysis, indicated that the parasite described here is a novel species of Henneguya, clustered with the marine congeneric species.
CONCLUSIONS
CONCLUSIONS
Henneguya aegea n. sp. infects in aquaculture P. major, a host introduced as eggs to the Mediterranean from Japan. Despite the high host specificity of the myxobolid parasites, H. aegea n. sp. seems to be able to use P. major as a host and propagate successfully, causing morbidity and mortality. This could result in spillback of the new species from high density cultured non-native P. major to native fish hosts.
Identifiants
pubmed: 31937360
doi: 10.1186/s13071-020-3888-7
pii: 10.1186/s13071-020-3888-7
pmc: PMC6961378
doi:
Substances chimiques
DNA, Protozoan
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
27Subventions
Organisme : NSRF 2014-2020
ID : MIS 5002470
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