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1 School for Agriculture and Environmental Science, Central University of Technology: Free State, 1 President Brandt Street, Bloemfontein 9300, South Africa
2 Department of Microbial, Biochemical and Food Biotechnology, University of the Free State, Bloemfontein, South Africa
3 Department of Biotechnology and Food Technology, Tshwane University of Technology, Pretoria, South Africa
4 BCCM/LMG Bacteria Collection, Ghent University, K. L. Ledeganckstraat 35, Ghent B-9000, Belgium
5 Laboratorium of Microbiology, Ghent University, K. L. Ledeganckstraat 35, Ghent B-9000, Belgium
Correspondence
Hanli de Beer
hdebeer{at}cut.ac.za
Four isolates from freshly caught fish samples obtained from the South Atlantic Ocean off the South African coastline were shown to represent a novel species in the genus Chryseobacterium by means of a polyphasic taxonomic study. The four isolates had virtually identical whole-cell protein profiles, fatty acid profiles and biochemical properties. Analysis of the 16S rRNA sequence of strain LMG 23089T revealed 99.3 and 98.9 % similarity to the 16S rRNA sequences of the type strains of Chryseobacterium balustinum and Chryseobacterium scophthalmum, respectively. Strain LMG 23089T and the C. balustinum and C. scophthalmum type strains formed a stable lineage supported by a bootstrap value of 100 %. The levels of DNADNA hybridization towards these nearest phylogenetic neighbours were below 57 %. The absence of growth on MacConkey agar or at 37 °C (on nutrient agar), the capacity to grow in the presence of 5 % NaCl and the production of urease activity differentiate this novel taxon from C. balustinum and C. scophthalmum. The four isolates are formally classified as Chryseobacterium piscium sp. nov., with strain LMG 23089T (=CCUG 51923T) as the type strain. Its DNA G+C content is 33.6 mol%.
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