Piscine mycobacteriosis – Involvement of bacterial species and reflection in pathology

Keller, C; Wenker, C; Jermann, T; Hirschi, Regula; Schildger, B; Meier, R; Schmidt-Posthaus, Heike (2018). Piscine mycobacteriosis – Involvement of bacterial species and reflection in pathology. Schweizer Archiv für Tierheilkunde, 160(6), pp. 385-393. Gesellschaft Schweizer Tierärztinnen und Tierärzte 10.17236/sat00165

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Piscine mycobacteriosis is a lethal disease with zoonotic potential, found worldwide in both fresh and marine fish. More than 20 strains of Mycobacterium spp. are known to persist in fish so far, but the pathogenicity is currently unknown for most of them. However, M. marinum is reported as one of the most pathogenic agents for fish and is involved in zoonotic cases. We examined 47 different cases from two zoological gardens, where fish tuberculosis was identified or previously suspected during the last ten years. We collected PCR and sequencing data, which were then compared to previously collected clinical data and pathology. The clinical signs caused by Mycobacterium spp. were similar in all the cases, except for cases infected by M. marinum, which lacked the presence of skin lesions. Lesions seen in histology caused by M. marinum tended to be more acute and severe compared lesions caused by other Mycobacterium spp. The majority of M. marinum cases have been reported within marine fish. In contrast to previous studies we detected this species to be the predominant bacteria present within freshwater fish. Interestingly, we detected M. holsaticum in one of the seawater systems used in this project, being the first report of this Mycobacterium species shown to be present in a fish.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP)
05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Center for Fish and Wildlife Health (FIWI)

UniBE Contributor:

Hirschi, Regula and Schmidt-Posthaus, Heike

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 630 Agriculture

ISSN:

0036-7281

Publisher:

Gesellschaft Schweizer Tierärztinnen und Tierärzte

Language:

German

Submitter:

Achim Braun Parham

Date Deposited:

23 May 2019 13:07

Last Modified:

24 Oct 2019 18:25

Publisher DOI:

10.17236/sat00165

PubMed ID:

29905162

BORIS DOI:

10.7892/boris.129642

URI:

https://boris.unibe.ch/id/eprint/129642

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