Short Communication

Archives of Microbiology

, Volume 188, Issue 5, pp 547-550

First online:

New species in the genus Francisella (Gammaproteobacteria; Francisellaceae); Francisella piscicida sp. nov. isolated from cod (Gadus morhua)

  • Karl F. OttemAffiliated withDepartment of Biology, University of Bergen Email author 
  • , Are NylundAffiliated withDepartment of Biology, University of Bergen
  • , Egil KarlsbakkAffiliated withDepartment of Biology, University of Bergen
  • , Alice Friis-MøllerAffiliated withDepartment of Clinical Microbiology, Hvidovre Hospital
  • , Bjørn KrossøyAffiliated withIntervet Norbio AS
  • , Dag KnappskogAffiliated withIntervet Norbio AS

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A Francisella strain, GM2212, previously isolated from moribund farmed Atlantic cod (Gadus morhua) in Norway, is closely related to Francisella philomiragia among Francisella spp. according to its complete 16S rDNA, 16S-23S intergenic spacer, 23S rDNA, 23S–5S intergenic spacer, 5S rDNA, FopA, lipoprotein TUL4 (LpnA), malate dehydrogenase and hypothetical lipoprotein (LpnB) sequences. A comparison between GM2212 and the type strain of Francisella philomiragia were performed by DNA–DNA hybridization and fatty acid analysis. The DNA–DNA hybridization showed a 70% similarity. The fatty acid analysis showed only minor differences between the Francisella isolates. Due to the inconclusive result from the DNA–DNA hybridisation, major emphasis concerning the status of this isolate is made on previously published molecular, phenotypic and biochemical characters. All characteristics taken together support the establishment of GM2212 as a novel species, for which the name Francisella piscicida sp. nov. is proposed (=CNCM I-3511T = DSM 18777T = LMG registration number not yet available).


Francisella piscicida sp. nov. DNA–DNA hybridization Fatty acids