Could mycotoxigenic Fusarium sp. play a role in ulcerative dermal necrosis (UDN) of brown trout (Salmo trutta morpha trutta)?
Fish diseases
Fungi
Mycotoxin
Ulcerative dermal necrosis (UDN)
Zearalenone
Journal
Mycotoxin research
ISSN: 1867-1632
Titre abrégé: Mycotoxin Res
Pays: Germany
ID NLM: 8807334
Informations de publication
Date de publication:
Aug 2020
Aug 2020
Historique:
received:
26
08
2019
accepted:
22
04
2020
revised:
02
04
2020
pubmed:
7
5
2020
medline:
10
10
2020
entrez:
7
5
2020
Statut:
ppublish
Résumé
Fusarium infections have been reported in aquatic animals, but are still poorly investigated in wild salmonids. The aim of the study was to determine the impact of the fungi and their toxins on the health status of brown trout (Salmo trutta morpha trutta) migrating from the Baltic Sea to the freshwater. Individuals from the wild brown trout population exhibiting ulcerative skin lesions were collected from the Słupia River in Poland and subjected to microbiological, histopathological, and hematological examinations, as well as toxicological analysis for a presence of mycotoxins. The results of microflora isolation from the brown trout skin samples revealed the presence of conditionally pathogenic bacteria and fungi classified by molecular techniques as Fusarium spp. Toxicological analysis allowed for detection of zearalenone (ZEN) in the liver, kidney, and gastrointestinal tract of the fish. In several cases, there was α-zearalenone (α-ZEL) identified at trace levels in the liver, as well as sterigmatocystin and enniatin B at low levels in the kidney and the liver. Histopathological examination revealed the presence of fungal hyphae disrupting the epidermis and penetrating into the necrotic dermis and hypodermis. The decreased values of the blood parameters, i.e., hemoglobin concentration (HGB), packed cell volume (PCV), mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and white blood cell count (WBC), were indicative of osmoregulation failure being a consequence of the skin damage. The results of the study provide new information regarding Fusarium sp. infection in brown trout and serve as the basis for further research on the potential impact of the fungi and their mycotoxins on the Baltic salmonid population, including their role in ulcerative dermal necrosis.
Identifiants
pubmed: 32372256
doi: 10.1007/s12550-020-00395-8
pii: 10.1007/s12550-020-00395-8
pmc: PMC7359170
doi:
Substances chimiques
Mycotoxins
0
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
311-318Références
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