First isolation of Flavobacterium psychrophilum from wild adult Great Lakes lake whitefish (Coregonus clupeaformis)
© 2022 The Authors. Journal of Fish Diseases published by John Wiley & Sons Ltd.
| Publié dans: | Journal of fish diseases. - 1998. - 45(2022), 7 vom: 01. Juli, Seite 1023-1032 |
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| Auteur principal: | |
| Autres auteurs: | , , , |
| Format: | Article en ligne |
| Langue: | English |
| Publié: |
2022
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| Accès à la collection: | Journal of fish diseases |
| Sujets: | Journal Article Flavobacterium psychrophilum Great Lakes bacterial coldwater disease lake whitefish recruitment |
| Résumé: | © 2022 The Authors. Journal of Fish Diseases published by John Wiley & Sons Ltd. Lake whitefish (Coregonus clupeaformis; LWF) is an economically and ecologically valuable native species to the Great Lakes, but recent declines in their recruitment have generated significant concern about their future viability. Although studies have sought to identify factors contributing to declining recruitment, the potential role(s) of infectious diseases has not been thoroughly investigated. In 2018 and 2019, adult LWF were collected from Lakes Superior, Michigan, and Huron for clinical examination and bacteriological analyses. Herein, we describe the first isolation of Flavobacterium psychrophilum, aetiological agent of bacterial coldwater disease (BCWD) and rainbow trout fry syndrome (RTFS), from systemically infected adult LWF. Bacterial isolates were yellow-orange, Gram-negative, filamentous bacilli that were oxidase and catalase positive, and produced a flexirubin-type pigment in 3% potassium hydroxide. Isolate identity was confirmed via F. psychrophilum-specific PCR, and multilocus sequence typing revealed three new singleton sequence types (STs) that were distinct from all previously described F. psychrophilum STs. The prevalence of F. psychrophilum infections was 3.3, 1.7, and 0.0% in Lakes Superior, Michigan and Huron respectively. Findings illustrate the potential for F. psychrophilum to cause systemic infections in adult LWF and highlight the need for future studies to investigate the bacterium's potential role in declining LWF recruitment |
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| Description: | Date Completed 10.06.2022 Date Revised 31.07.2022 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1365-2761 |
| DOI: | 10.1111/jfd.13626 |