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  • Title: Acetanaerobacterium elongatum gen. nov., sp. nov., from paper mill waste water.
    Author: Chen S, Dong X.
    Journal: Int J Syst Evol Microbiol; 2004 Nov; 54(Pt 6):2257-2262. PubMed ID: 15545467.
    Abstract:
    Two mesophilic anaerobic bacterial strains (Z7(T) and Z1) were isolated from waste water sludge of the Xinanzhang paper mill, Beijing, China. The strains were Gram-positive, non-spore-forming and motile. Cells were thin rods (0.2-0.4x4.0-8.0 microm). Growth of the strains was observed at 20-42 degrees C and pH 5.0-7.5. Both strains hydrolysed gelatin and aesculin and fermented several kinds of mono-, di- and oligosaccharides. The fermentation end products formed from glucose were acetate, ethanol, hydrogen and carbon dioxide. The predominant cellular fatty acids were the branched-chain fatty acids isoC(15 : 0) (42.83 %) and isoC(14 : 0) (32.11 %). The DNA G+C contents of strains Z7(T) and Z1 were 50.4 and 48.6 mol%, respectively. Phylogenetic analysis based on 16S rRNA gene sequences revealed that the isolates represent a new phyletic sublineage within the Clostridium leptum rRNA cluster, with <91 % 16S rRNA gene sequence similarity to currently described species. On the basis of polyphasic evidence from this study, Acetanaerobacterium elongatum gen. nov., sp. nov., a novel genus and species, is proposed, with strain Z7(T) (=JCM 12359(T)=AS 1.5012(T)) as the type strain.
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