The Type 9 Secretion System Is Required for Biofilm Formation.

forms biofilms in low nutrient conditions. Protein secretion and cell motility may have roles in biofilm formation. The type IX secretion system (T9SS) is important for both secretion and motility.

The Type IX Secretion System Is Required for Virulence of the Fish Pathogen Flavobacterium columnare.

, a member of the phylum , causes columnaris disease in wild and aquaculture-reared freshwater fish. The mechanisms responsible for columnaris disease are not known. Many members of the phylum use type IX secretion systems (T9SSs) to secrete enzymes, adhesins, and proteins involved in gliding motility.

Novel features of the polysaccharide-digesting gliding bacterium Flavobacterium johnsoniae as revealed by genome sequence analysis.

The 6.10-Mb genome sequence of the aerobic chitin-digesting gliding bacterium Flavobacterium johnsoniae (phylum Bacteroidetes) is presented. F.

Development of methods for the genetic manipulation of Flavobacterium columnare.

Background: Flavobacterium columnare is the causative agent of columnaris disease, a disease affecting many freshwater fish species. Methods for the genetic manipulation for some of the species within the Bacteroidetes, including members of the genus Flavobacterium, have been described, but these methods were not adapted to work with F. columnare.

Susceptibility of zebra fish Danio rerio to infection by Flavobacterium columnare and F. johnsoniae.

Flavobacterium columnare is a serious pathogen in a wide range of fish species. F. johnsoniae is an opportunistic pathogen of certain fish.

Mutations in Flavobacterium johnsoniae gldF and gldG disrupt gliding motility and interfere with membrane localization of GldA.

Flavobacterium johnsoniae moves rapidly over surfaces by a process known as gliding motility. The mechanism of this form of motility is not known. Four genes that are required for F.