Pathology attributed to Mycobacterium chelonae infection among farmed and laboratory-infected Atlantic salmon Salmo salar

D. W. Bruno, J. Griffiths, C. G. Mitchell, B. P. Wood, Z. J. Fletcher, Francis Drobniewski, T. S. Hastings

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

This study was promoted following concern over increasing mortality on 2 farms rearing Atlantic salmon Salmo salar in the Shetland Isles, Scotland. A Mycobacterium sp. was isolated from moribund, market-sized Atlantic salmon. Biochemical tests, lipid analysis and PCR (polymerase chain reaction) techniques confirmed the bacterium to be Mycobacterium chelonae. Multiple greyish-white miliary granuloma-like nodules were observed in several tissues. Dense hard-packed nodules contained abundant acid-fast bacteria. Atlantic salmon injected with M. chelonae remained sub-clinically infected, demonstrating the chronic nature of this disease. The source of the pathogen was not identified.

Original languageEnglish
Pages (from-to)101-109
Number of pages9
JournalDiseases of Aquatic Organisms
Volume33
Issue number2
DOIs
Publication statusPublished - 19 Jun 1998

Keywords

  • Atlantic salmon
  • Mycobacteriosis
  • Mycobacterium chelonae
  • Pathology
  • PCR

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