Flavobacterium

Flavobacterium
Systematics
Domain : Bacteria (bacteria) Department : Bacteroidetes Class : Flavobacteriia Order : Flavobacteriales Family : Flavobacteriaceae Genre : Flavobacterium
Scientific name
Flavobacterium
Bergey et al. (1923)

Gill infection in king salmon by Flavobacterium columnare

The bacteria - genus Flavobacterium (from latin flavus , yellow ' ) comprises gram negative , aerobic - microaerophilic rods 4-8 microns in length. It contains some fish pathogenic species that were formerly assigned to the genera Cytophaga and Flexibacter . The colonies are pigmented yellow to red-orange, hence the name.

There are no flagella . However, some species can move " gliding motility ".

Many species of the genus Flavobacterium have a high to predominant proportion of branched fatty acid chains in their membrane lipids .

Your indole test will usually be positive

metabolism

All types of Flavobacterium are chemoorganoheterotrophic . The majority are strictly aerobic and the metabolic pathway is breathing . The species Flavobacterium hydatis , F. johnsoniae and F. succinicans can also grow anaerobically, i.e. with the exclusion of oxygen.

In addition to breathing, many species can also reduce nitrate to nitrite , e.g. F. johnsoniae and F. columnare . Flavobacterium denitrificans completely reduces nitrate to molecular nitrogen (N ₂ ). It was isolated from an earthworm intestine. In addition to N ₂ here also is nitrous oxide (laughing gas, N ₂ O), a greenhouse gas released.

species

A selection of types follows:

• Flavobacterium antarcticum
• Flavobacterium aquatile
• Flavobacterium branchiophilum → causes bacterial gill disease in trout
• Flavobacterium columnare → causes columnarian disease in fish
• Flavobacterium denitrificans
• Flavobacterium flevense
• Flavobacterium glaciei
• Flavobacterium hydatis
• Flavobacterium johnsoniae
• Flavobacterium omnivorum
• Flavobacterium pectinovorum
• Flavobacterium psychrophilum → causes the cold-water disease of the salmonids , the cold-water disease of rainbow trout and the cotton disease of freshwater fish
• Flavobacterium saccharophilum
• Flavobacterium succinicans
• Flavobacterium xinjiangense
• Flavobacterium xueshanense

literature

• Medical microbiology, infection and epidemic theory von Rolle / Mayr, Enke Verlag Stuttgart (2007)
• MJ Pickett: Methods for identification of flavobacteria. In: J Clin Microbiol. 1989 October; 27 (10): 2309-2315. PMC 267015 (free full text)

Individual evidence

1. ↑ T. Kaneda: Iso- and anteiso-fatty acids in bacteria: biosynthesis, function, and taxonomic significance. In: Microbiol. Rev. 55 (2); June 1991: pp. 288–302 PMID 1886522 (free full text access )
2. ↑ MA Horn: Dechloromonas denitrificans sp. nov., Flavobacterium denitrificans sp. nov., Paenibacillus anaericanus sp. nov. and Paenibacillus terrae strain MH72, N2O-producing bacteria isolated from the gut of the earthworm Aporrectodea caliginosa . In: International Journal of Systematic and Evolutionary Microbiology . 55, No. 3, 2005, ISSN 1466-5026 , pp. 1255-1265. doi : 10.1099 / ijs.0.63484-0 . PMID 15879265 .  

Web links

• Lexicon of biology, spectrum