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Phenotypic and genotypic characterization of Flavobacterium psychrophilum from Finnish fish farms
Madetoja, J.; Hänninen, M.-L.; Hirvelä-Koski, V.; Dalsgaard, I.; Wiklund, T. (2001). Phenotypic and genotypic characterization of Flavobacterium psychrophilum from Finnish fish farms. J. Fish Dis. 24: 469-479
In: Journal of Fish Diseases. Blackwell Science: Oxford; London; Edinburgh; Boston; Melbourne. ISSN 0140-7775, more
Peer reviewed article  

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  • Madetoja, J.
  • Hänninen, M.-L.
  • Hirvelä-Koski, V.
  • Dalsgaard, I.
  • Wiklund, T.

    Finnish isolates (n = 37) of Flavobacterium psychrophilum isolated from farmed salmonids were studied using phenotypic and genotypic characteristics. The characteristics of isolates were compared with the characteristics of Swedish and Estonian F. psychrophilum isolates and the type strain, F. psychrophilum NCIMB 1947T. Multiple isolates from eight disease outbreaks were examined to determine differences between isolates from a single outbreak. The F. psychrophilum isolates represented a bio- chemically homogeneous group. However, some minor differences in biochemical and physiological characteristics were observed. Seven different antigenic patterns among Finnish isolates were detected and the results suggest a new serotype of F. psychrophilum. Using ClaI, HaeIII and PvuII restriction enzymes in ribotyping analyses 13 different genotypes were demonstrated and a possible relationship between serotype Fd and genotype F1 was determined. There were no significant differences between the isolates from Finland, Estonia, Sweden and the type strain of F. psychrophilum.

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