PMID- 32160147 OWN - NLM STAT- MEDLINE DCOM- 20200508 LR - 20200508 IS - 1466-5034 (Electronic) IS - 1466-5026 (Linking) VI - 70 IP - 3 DP - 2020 Mar TI - Reclassification of Francisella noatunensis subsp. orientalis Ottem et al. 2009 as Francisella orientalis sp. nov., Francisella noatunensis subsp. chilensis subsp. nov. and emended description of Francisella noatunensis. PG - 2034-2048 LID - 10.1099/ijsem.0.004009 [doi] AB - Francisella noatunensis is a fastidious facultative intracellular bacterial pathogen that causes 'piscine francisellosis', a serious disease affecting both marine and fresh water farmed and wild fish worldwide. Currently two F. noatunensis subspecies are recognized, i.e. F. noatunensis subsp. noatunensis and F. noatunensis subsp. orientalis. In the present study, the taxonomy of F. noatunensis was revisited using a polyphasic approach, including whole genome derived parameters such as digital DNA-DNA hybridization, whole genome average nucleotide identity (wg-ANIm), whole genome phylogenetic analysis, whole genome G+C content, metabolic fingerprinting and chemotaxonomic analyses. The results indicated that isolates belonging to F. noatunensis subsp. orientalis represent a phenotypically and genetically homogenous taxon, clearly distinguishable from F. noatunensis subsp. noatunensis that fulfils requirements for separate species status. We propose, therefore, elevation of F. noatunensis subsp. orientalis to the species rank as Francisella orientalis sp. nov. with the type strain remaining as Ehime-1(T) (DSM 21254(T)=LMG 24544(T)). Furthermore, we identified sufficient phenotypic and genetic differences between F. noatunensis subsp. noatunensis recovered from diseased farmed Atlantic salmon in Chile and those isolated from wild and farmed Atlantic cod in Northern Europe to warrant proposal of the Chilean as a novel F. noatunensis subspecies, i.e. Francisella noatunensis subsp. chilensis subsp. nov. with strain PQ1106(T) (CECT 9798(T)=NCTC14375(T)) as the type strain. Finally, we emend the description of F. noatunensis by including further metabolic information and the description of atypical strains. FAU - Ramirez-Paredes, Jose Gustavo AU - Ramirez-Paredes JG AD - Ridgeway Biologicals Ltd. a Ceva Sante Animale Company, Units 1-3 Old Station Business Park, Compton, Berkshire, England, RG20 6NE, UK. AD - Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK. AD - Present address: Ridgeway Biologicals Ltd. a Ceva Sante Animale Company, Units 1-3 Old Station Business Park, Compton, Berkshire, England, RG20 6NE, UK. FAU - Larsson, Par AU - Larsson P AD - Swedish Defence Research Agency (FOI), CBRN Defence and Security, Umea, Sweden. AD - Department of Medical Biosciences, Umea University, Umea, Sweden. FAU - Thompson, Kim D AU - Thompson KD AD - Aquaculture Research Group, Moredun Research Institute, Edinburgh, Scotland, EH26 0PZ, UK. FAU - Penman, David J AU - Penman DJ AD - Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK. FAU - Busse, Hans-Jurgen AU - Busse HJ AD - Institute of Microbiology, Veterinary University, Vienna, A-1160 Wien, Austria. FAU - Ohrman, Caroline AU - Ohrman C AD - Swedish Defence Research Agency (FOI), CBRN Defence and Security, Umea, Sweden. FAU - Sjodin, Andreas AU - Sjodin A AD - Swedish Defence Research Agency (FOI), CBRN Defence and Security, Umea, Sweden. FAU - Soto, Esteban AU - Soto E AD - Department of Medicine and Epidemiology, University of California Davis, School of Veterinary Medicine, Davis, California, 95616, USA. FAU - Richards, Randolph H AU - Richards RH AD - Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK. FAU - Adams, Alexandra AU - Adams A AD - Institute of Aquaculture, Faculty of Natural Sciences, University of Stirling, Stirling, Scotland, FK9 4LA, UK. FAU - Colquhoun, Duncan J AU - Colquhoun DJ AD - Fish Health Research Group, Norwegian Veterinary Institute, Oslo, Pb 750 Sentrum, N-0106 Oslo, Norway. LA - eng PT - Journal Article PL - England TA - Int J Syst Evol Microbiol JT - International journal of systematic and evolutionary microbiology JID - 100899600 RN - 0 (DNA, Bacterial) RN - 0 (RNA, Ribosomal, 16S) RN - Francisella noatunensis SB - IM MH - Animals MH - Bacterial Typing Techniques MH - Chile MH - DNA, Bacterial/genetics MH - Europe MH - Fish Diseases/microbiology MH - Fishes/microbiology MH - Francisella/*classification MH - Gram-Negative Bacterial Infections/veterinary MH - Nucleic Acid Hybridization MH - *Phylogeny MH - RNA, Ribosomal, 16S/genetics MH - Sequence Analysis, DNA OTO - NOTNLM OT - Francisella new species OT - Francisella noatunensis subsp. chilensis OT - Francisella orientalis OT - Francisella salmon Chile OT - Francisella tilapia OT - tilapia diseases EDAT- 2020/03/12 06:00 MHDA- 2020/05/10 06:00 CRDT- 2020/03/12 06:00 PHST- 2020/03/12 06:00 [pubmed] PHST- 2020/05/10 06:00 [medline] PHST- 2020/03/12 06:00 [entrez] AID - 10.1099/ijsem.0.004009 [doi] PST - ppublish SO - Int J Syst Evol Microbiol. 2020 Mar;70(3):2034-2048. doi: 10.1099/ijsem.0.004009.