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Environmental Screening of Aeromonas hydrophila, Mycobacterium spp., and Pseudocapillaria tomentosa in Zebrafish Systems
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Published on: December 8, 2017

Mycobacteria isolated from Chesapeake Bay fish.

C B Stine1, A S Kane, A M Baya

  • 1US Food and Drug Administration, Center for Veterinary Medicine, Laurel, MD, USA.

Journal of Fish Diseases
|November 14, 2009
PubMed
Summary

Mycobacteria commonly infect Chesapeake Bay fish, causing disease. This study found most mycobacterial strains infect multiple fish species and locations, with few showing host or site specificity.

Area of Science:

  • Aquatic microbiology
  • Fish pathology
  • Environmental science

Background:

  • Mycobacteriosis is a significant disease affecting fish populations globally.
  • Previous isolation of mycobacteria from Chesapeake Bay fish indicates a need to understand host-pathogen dynamics.
  • Understanding host specificity and location fidelity is crucial for managing fish health.

Purpose of the Study:

  • To identify potential host specificity of mycobacterial isolates from Chesapeake Bay fish.
  • To determine the location fidelity of mycobacterial isolates within the Chesapeake Bay ecosystem.
  • To investigate the diversity and distribution of mycobacteria in wild fish populations.

Main Methods:

  • Isolation of mycobacteria from wild fish collected across multiple Chesapeake Bay sites (2003-2006).

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  • Gas chromatography dendrogram clustering to group and analyze mycobacterial isolates.
  • Identification of host species and collection sites for each isolate.

    • Main Results:

    • Mycobacteria were isolated from 13 different fish species in the Chesapeake Bay.
    • Twenty-nine distinct mycobacterial groups were identified through clustering analysis.
    • Most mycobacterial groups were found in multiple host species and collection sites.
    • Four groups were exclusively isolated from striped bass, with three resembling Mycobacterium shottsii.

    Conclusions:

    • Multiple fish species in the Chesapeake Bay are colonized by diverse mycobacterial isolates.
    • Mycobacterial infections in these fish show limited host or location specificity.
    • Further research is needed to understand the implications of widespread mycobacterial presence in fish.