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Oblitimonas alkaliphila gen. nov., sp. nov., in the family Pseudomonadaceae, recovered from a historical collection of previously unidentified clinical strains
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  • Alternative Title:
    Int J Syst Evol Microbiol
  • Description:
    Eight Gram-stain-negative bacteria (B4199T, C6819, C6918, D2441, D3318, E1086, E1148 and E5571) were identified during a retrospective study of unidentified strains from a historical collection held in the Special Bacteriology Reference Laboratory at the Centers for Disease Control and Prevention. The strains were isolated from eight patients: five female, two male and one not specified. No ages were indicated for the patients. The sources were urine (3), leg tissue (2), foot wound, lung tissue and deep liver. The strains originated from seven different states across the USA [Colorado, Connecticut (2), Indiana, North Carolina, Oregon and Pennsylvania]. The strains grew at 10-42 °C, were non-motile, alkalitolerant, slightly halophilic, microaerophilic, and catalase- and oxidase-positive. The DNA G+C content was 47.3-47.6 mol%. The major cellular fatty acids were tetradecanoic acid (C14 : 0), hexadecanoic acid (C16 : 0) and 11-octadecenoic acid (C18 : 1ω7c). Polar lipids detected were phosphatidylglycerol, phosphatidylethanolamine, diphosphatidylglycerol and unknown phospholipids; the only respiratory quinone detected was the ubiquinone Q-9 (100 %). 16S rRNA gene sequence analysis produced results with 95.6 % similarity to Pseudomonas caeni DSM 24390T and 95.2 % similarity to Thiopseudomonas denitrificans X2T. The results of the biochemical, chemotaxonomic and phylogenetic analyses between the study strains and some related type strains indicated that these strains represent a novel species of a new genus within the family Pseudomonadaceae, for which the name Oblitimonas alkaliphila gen. nov., sp. nov. is proposed. The type strain is B4199T (=DSM 100830T=CCUG 67636T).

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