Biofilm Formation by the Fish Pathogen Flavobacterium columnare: Development and Parameters Affecting Surface Attachment

We have shown that F. columnare can survive in water without nutrients for extended periods, its cells underwent drastic morphological changes that resulted in loss of fitness over time

Wenlong Cai; Leonardo De La Fuente; Covadonga R. Arias


Scholarcy highlights

  • Flavobacterium columnare is a bacterial fish pathogen that affects many freshwater species worldwide
  • Studies using light microscopy confirmed that F. columnare can attach to and rapidly colonize microscope slides
  • We have characterized the dynamics of biofilm formation by the fish pathogen F. columnare under static and flow conditions
  • The cells were observed gliding on the surface, as has been reported during the early stages of biofilm formation by other Gram-negative bacteria
  • Mannose is known to be a receptor for different bacterial adhesins; the addition of mannose can block attachment to surfaces but the opposite effect was observed in F. columnare
  • Further studies are needed to assess if F. columnare persists as biofilm in aquaculture settings, our study provides the baseline to determine the effects that temperature, salinity, and hardness will have in a commercial operation
  • 5640 formation of biofilm by the fish pathogen F. columnare under both static and flow conditions

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