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Flavobacterium plurextorum sp nov Isolated from Farmed Rainbow Trout (Oncorhynchus mykiss)

Artikel i vetenskaplig tidskrift
Författare L. Zamora
J. F. Fernandez-Garayzabal
C. Sanchez-Porro
M. A. Palacios
Edward R.B. Moore
L. Dominguez
A. Ventosa
A. I. Vela
Publicerad i Plos One
Volym 8
Nummer/häfte 6
Sidor e67741
ISSN 1932-6203
Publiceringsår 2013
Publicerad vid Institutionen för biomedicin, avdelningen för infektionssjukdomar
Sidor e67741
Språk en
Länkar dx.doi.org/10.1371/journal.pone.006...
https://gup.ub.gu.se/file/177430
Ämnesord emended description, maximum-likelihood, lipid-composition, fish, johnsoniae, family, pond
Ämneskategorier Mikrobiologi

Sammanfattning

Five strains (1126-1H-08(T), 51B-09, 986-08, 1084B-08 and 424-08) were isolated from diseased rainbow trout. Cells were Gram-negative rods, 0.7 mu m wide and 3 mu m long, non-endospore-forming, catalase and oxidase positive. Colonies were circular, yellow-pigmented, smooth and entire on TGE agar after 72 hours incubation at 25 degrees C. They grew in a temperature range between 15 degrees C to 30 degrees C, but they did not grow at 37 degrees Cor 42 degrees C. Based on 16S rRNA gene sequence analysis, the isolates belonged to the genus Flavobacterium. Strain 1126-1H-08(T) exhibited the highest levels of similarity with Flavobacterium oncorhynchi CECT 7678(T) and Flavobacterium pectinovorum DSM 6368(T) (98.5% and 97.9% sequence similarity, respectively). DNA-DNA hybridization values were 87 to 99% among the five isolates and ranged from 21 to 48% between strain 1126-1H-08(T), selected as a representative isolate, and the type strains of Flavobacterium oncorhynchi CECT 7678(T) and other phylogenetic related Flavobacterium species. The DNA G+C content of strain 1126-1H-08(T) was 33.2 mol%. The predominant respiratory quinone was MK-6 and the major fatty acids were iso-C-15:0 and C-15:0. These data were similar to those reported for Flavobacterium species. Several physiological and biochemical tests differentiated the novel bacterial strains from related Flavobacterium species. Phylogenetic, genetic and phenotypic data indicate that these strains represent a new species of the genus Flavobacterium, for which the name Flavobacterium plurextorum sp. nov. was proposed. The type strain is 1126-1H-08(T) (=CECT 7844(T) = CCUG 60112(T)).

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