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Int J Syst Evol Microbiol 58 (2008), 89-92; DOI  10.1099/ijs.0.65118-0
© 2008 International Union of Microbiological Societies

Prevotella amnii sp. nov., isolated from human amniotic fluid

Paul A. Lawson1, Edward Moore2 and Enevold Falsen2

1 Department of Botany and Microbiology, University of Oklahoma, Norman, OK 73019-0245, USA
2 Culture Collection, Department of Clinical Bacteriology, University of Göteborg, SE-413 46 Göteborg, Sweden

Correspondence
Paul A. Lawson
paul.lawson{at}ou.edu

Two Gram-negative, anaerobic, non-spore-forming, rod-shaped organisms were isolated from human amniotic fluid. Based on morphological and biochemical criteria, the strains were tentatively identified as Bacteroidaceae but they did not appear to correspond to any recognized species of this family. Comparative 16S rRNA gene sequencing studies showed the strains were highly related to each other and confirmed their placement in the genus Prevotella, but sequence divergence values of >4 % with reference Prevotella species demonstrated that the organisms from human clinical sources represent a novel species. Phylogenetic analysis revealed the novel organism to be most closely related to Prevotella bivia, an organism frequently associated with pelvic inflammatory diseases. The major long-chain cellular fatty acids of the novel species consist of iso-C14 : 0, anteiso-C15 : 0, iso-C15 : 0, C16 : 0, iso-C16 : 0 and iso-3-OH-C17 : 0. Based on biochemical criteria and phylogenetic considerations, it is proposed that the unknown isolates from human amniotic fluid be assigned to a new species of the genus Prevotella, as Prevotella amnii sp. nov. The type strain of Prevotella amnii is CCUG 53648T (=JCM 14753T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain CCUG 53648T is AM422125.






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