An outbreak of Shewanella putrefaciens group in wild eels Anguilla anguilla L. favoured by hypoxic aquatic environments
© 2016 John Wiley & Sons Ltd.
| Veröffentlicht in: | Journal of fish diseases. - 1998. - 40(2017), 7 vom: 08. Juli, Seite 929-939 |
|---|---|
| 1. Verfasser: | |
| Weitere Verfasser: | , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2017
|
| Zugriff auf das übergeordnete Werk: | Journal of fish diseases |
| Schlagworte: | Journal Article Shewanella putrefaciens Shewanella xiamenensis hypoxic aquatic environments wild European eels |
| Zusammenfassung: | © 2016 John Wiley & Sons Ltd. Microbiological analyses were conducted on wild eels from the L'Albufera Lake (Spain). A total of 174 individuals were collected in two surveys (i.e. year 2008 and autumn-winter 2014) among those caught by local fishermen into the lagoon. The prevalence of Shewanella putrefaciens group was 1.7% in 2008 and rose above 32% in 2014. It was due to an outbreak of shewanellosis that presented a morbidity rate of 64%. S. putrefaciens group strains were isolated as pure cultures from the sick eels that showed white ulcers surrounded by a reddish inflammation, damage of the mouth, extensive skin discoloration, exophthalmia, ascites and bad odour. The S. putrefaciens group was recovered from freshwater samples taken at the L'Albufera system, along autumn-winter 2015. Its counts significantly increased in freshwater parallel to hypoxia and temperature rising. Shewanellae strains were identified as S. putrefaciens and S. xiamenensis by 16S rRNA gene sequencing. These isolates recovered from sick eels or freshwater were virulent for European eel by IP challenge (LD50 106 CFU g-1 body weight). They also caused 30-38% cumulative mortality, in European eels challenged by a 2-h bath (107 CFU mL-1 ). These results suggest that shewanellosis could be transmitted through water highlighting the fact that hypoxic conditions increase this bacterium levels in water |
|---|---|
| Beschreibung: | Date Completed 06.11.2017 Date Revised 09.12.2020 published: Print-Electronic GENBANK: FJ589031, X81623 Citation Status MEDLINE |
| ISSN: | 1365-2761 |
| DOI: | 10.1111/jfd.12574 |