Phenotypic and pathobiological properties of Corynebacterium aquaticum isolated from diseased striped bass

A Corynebacterium strain was isolated from the brain tissues of 3 yr old striped bass Morone saxatilis with pronounced bilateral exophthalmia that were being held in experimental aquaculture facilities. Taxonomic analysis, using conventional tests and the API-Coryne system, allowed us to identify th...

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Bibliographic Details
Published in:Diseases of aquatic organisms 1992, Vol.14 (2), p.115-126
Main Authors: BAYA, A. M, LUPIANI, B, BANDIN, I, HETRICK, F. M, FIGUERAS, A, CARNAHAN, A, MAY, E. M, TORANZO, A. E
Format: Article
Language:English
Subjects:
Animal bacterial diseases
Bacterial diseases
Biological and medical sciences
Corynebacterium aquaticum
Freshwater
Infectious diseases
Medical sciences
Morone saxatilis
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Summary:A Corynebacterium strain was isolated from the brain tissues of 3 yr old striped bass Morone saxatilis with pronounced bilateral exophthalmia that were being held in experimental aquaculture facilities. Taxonomic analysis, using conventional tests and the API-Coryne system, allowed us to identify the striped bass strain (RB 968 BA) as Corynebacterium aquaticum . An agglutination assay demonstrated that the fish isolated was serologically related to the reference strain of C. aquaticum (ATCC 14665) originally isolated from water. Although both strains exhibited different surface protein patterns, immunoblot analysis revealed they shared a protein antigen of 68 kDa. Histopathological examination showed lesions in the internal organs of experimentally infected fish. The brain and eyes were the most affected organs and showed acute hemorrhages. Personnel involved in culturing fish should be made aware of the pathogenic capability exhibited by C. aquaticum for mammals.
ISSN:0177-5103
1616-1580
DOI:10.3354/dao014115