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'Peptoniphilus vaginalis' sp. nov., a new species isolated from human female genital tract.

ABSTRACT: We relate here the main characteristics of 'Peptoniphilus vaginalis', strain KHD2 (= CSUR P0125 = DSM 101742), a new member of the Peptoniphilus genus, cultivated from a vaginal sample of a woman with bacterial vaginosis.

SUBMITTER: Diop K

PROVIDER: S-EPMC4954932 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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'Peptoniphilus vaginalis' sp. nov., a new species isolated from human female genital tract.

Diop K K Mediannikov O O Raoult D D Bretelle F F Fenollar F F

New microbes and new infections 20160615

We relate here the main characteristics of 'Peptoniphilus vaginalis', strain KHD2 (= CSUR P0125 = DSM 101742), a new member of the Peptoniphilus genus, cultivated from a vaginal sample of a woman with bacterial vaginosis. ...[more]

PMID: 27482387

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Project description:Six strictly anaerobic Gram-negative bacteria representing three novel species were isolated from the female reproductive tract. The proposed type strains for each species were designated UPII 199-6T, KA00182T and BV3C16-1T. Phylogenetic analyses based on 16S rRNA gene sequencing indicated that the bacterial isolates were members of the genus Megasphaera. UPII 199-6T and KA00182T had 16S rRNA gene sequence identities of 99.9 % with 16S rRNA clone sequences previously amplified from the human vagina designated as Megasphaera type 1 and Megasphaera type 2, members of the human vaginal microbiota associated with bacterial vaginosis, preterm birth and HIV acquisition. UPII 199-6T exhibited sequence identities ranging from 92.9 to 93.6 % with validly named Megasphaera isolates and KA00182T had 16S rRNA gene sequence identities ranging from 92.6-94.2 %. BV3C16-1T was most closely related to Megasphaera cerevisiae with a 16S rRNA gene sequence identity of 95.4 %. Cells were coccoid or diplococcoid, non-motile and did not form spores. Genital tract isolates metabolized organic acids but were asaccharolytic. The isolates also metabolized amino acids. The DNA G+C content for the genome sequences of UPII 199-6T, KA00182T and BV3C16-1T were 46.4, 38.9 and 49.8 mol%, respectively. Digital DNA-DNA hybridization and average nucleotide identity between the genital tract isolates and other validly named Megasphaera species suggest that each isolate type represents a new species. The major fatty acid methyl esters include the following: C12 : 0, C16 : 0, C16 : 0 dimethyl acetal (DMA) and summed feature 5 (C15 : 0 DMA and/or C14 : 0 3-OH) in UPII 199-6T; C16 : 0 and C16 : 1cis 9 in KA00182T; C12 : 0; C14 : 0 3-OH; and summed feature 5 in BV3C16-1T. The isolates produced butyrate, isobutyrate, and isovalerate but there were specific differences including production of formate and propionate. Together, these data indicate that UPII 199-6T, KA00182T and BV3C16-1T represent novel species within the genus Megasphaera. We propose the following names: Megasphaera lornae sp. nov. for UPII 199-6T representing the type strain of this species (=DSM 111201T=ATCC TSD-205T), Megasphaera hutchinsoni sp. nov. for KA00182T representing the type strain of this species (=DSM 111202T=ATCC TSD-206T) and Megasphaera vaginalis sp. nov. for BV3C16-1T representing the type strain of this species (=DSM 111203T=ATCC TSD-207T).

Dataset Information

'Peptoniphilus vaginalis' sp. nov., a new species isolated from human female genital tract.

Publications

'Peptoniphilus vaginalis' sp. nov., a new species isolated from human female genital tract.

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