Accepted Manuscript “Vaginella massiliensis” gen. nov., sp. nov., a new genus cultivated from human female genital tract Khoudia Diop, Oleg Mediannikov, Didier Raoult, Florence Bretelle, Florence Fenollar, Pr PII:
S2052-2975(16)30102-0
DOI:
10.1016/j.nmni.2016.09.012
Reference:
NMNI 233
To appear in:
New Microbes and New Infections
Received Date: 4 September 2016 Revised Date:
16 September 2016
Accepted Date: 21 September 2016
Please cite this article as: Diop K, Mediannikov O, Raoult D, Bretelle F, Fenollar F, “Vaginella massiliensis” gen. nov., sp. nov., a new genus cultivated from human female genital tract, New Microbes and New Infections (2016), doi: 10.1016/j.nmni.2016.09.012. This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.
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“Vaginella massiliensis” gen. nov., sp. nov., a new genus cultivated from human female genital tract
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Running title: “Vaginella massiliensis”
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Khoudia Diop1, Oleg Mediannikov1, Didier Raoult1,2, Florence Bretelle1,3 and Florence Fenollar1*
Aix Marseille Univ, Institut hospitalo-universitaire Méditerranée-infection, URMITE, UM63,
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CNRS 7278, IRD 198, Inserm U1095, Faculté de médecine, 27 Boulevard Jean Moulin, 13385 Marseille cedex 05, France Tel: +33 491 385 517, Fax: +33 491 387 772. 2
Special Infectious Agents Unit, King Fahd Medical Research Center, King Abdulaziz
University, Jeddah, Saudi Arabia.
Department of Gynecology and Obstetrics, Gynépole, Hôpital Nord, Assistance Publique-
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Hôpitaux de Marseille, AMU, Aix-Marseille Université.
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*Corresponding author: Pr Florence Fenollar
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Email:
[email protected]
Keywords: “Vaginella massiliensis”, vaginal flora, culturomics, human microbiota, Flavobacteriaceae
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Abstract We relate the main characteristics of “Vaginella massiliensis” strain Marseille P2517 (= DSM 102346 = CSUR P2517), a new member of the Flavobacteriaceae family. The strain
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Marseille P2517 was cultivated in the vaginal swab of a healthy, 22-year-old, woman.
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As part of the study of the vaginal microbiota by the concept of “microbial culturomics”
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[1], in February 2016, we isolated, from the vaginal sample of a healthy 22-year-old woman, a
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bacterium that could not be identified using matrix-assisted laser desorption-ionization time-of-
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flight (MALDI-TOF) mass spectrometry (MS) performed with a MicroFlex spectrometer (Bruker
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Daltonics, Bremen, Germany) [2]. The study was authorized by the local ethics committee of the
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IFR48 (Marseille, France) under the agreement 09-022; the patient gave also her written consent.
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The initial growth of strain Marseille P2517 was obtained at 37°C under aerobic conditions
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after 2 days of culture on Chocolat PolyViteX (PVX) agar (BD Diagnostics, Le Pont-de-Claix,
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France) after 7 days of pre-incubation in a blood culture bottle (BD Diagnostics) enriched with 4
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ml of rumen that was filter-sterilized through at 0.2µm pore filter (Thermo Fisher Scientific,
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Villebon-sur-Yvette, France) and 3 ml of sheep blood (bioMérieux, Marcy l’Etoile, France).
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Bacterial cells were Gram-negative rod-shaped bacilli, non-motile, and non-spore-forming with a
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diameter ranging from 0.54 to 0.68 µm and a length ranging from 1.2 to 1.5 µm. Strain Marseille
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P2517 exhibited positive oxydase activity but catalase was negative. After 2 days of incubation at
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37°C under aerobic conditions on blood agar (bioMérieux), colonies were light yellow, opaque,
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circular, and smooth with a diameter of 1.7 to 2 mm. Strain Marseille P2517 is obligate aerobe.
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The 16S rRNA sequence was obtained after amplification using the universal primer pair
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(fD1 and rp2) and a 3130-XL sequencer (Applied Biosciences, Saint-Aubin, France), as
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previously reported [3]. 16S rRNA gene sequence-based identification of strain Marseille P2517
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showed 93% of identity with Weeksella virosa DSM 16922 (GenBank accession number
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NR_074495), the phylogenetically closest bacterium with a validly published name (Figure 1).
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As this sequence was below the 95% threshold set by Stackebrandt and Elbers to define a new
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genus without carrying out DNA-DNA hybridization [4], strain Marseille P2517 was classified as
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the representative strain of a new genus belonging to the family Flavobacteriaceae in the phylum
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Bacteroidetes [5].
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Weeksella virosa was first described in 1987 by Holmes et al. [6]. This bacterium is rodshaped, aerobic, Gram-negative, non-motile, and non-saccharolytic, exhibiting a positive activity
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for catalase and oxidase [6]. Weeksella virosa is mostly isolated from the human urogenital tract.
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As well the strain Marseille P2517 presents a 16S rRNA divergence around 7% with its phylogenetically closest species [8], we propose that it may be the representative strain of a novel
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genus preliminarily named here "Vaginella" (Va.gi.nel′la. L. fem. n. vagina, vagina, a part of the
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female genital tract; L. dim. suff. -ella; N. L. dim. fem. n. Vaginella, a small vagina, referring to
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the source of the isolation of the type strain). Strain Marseille P2517 is the type strain of the new
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species “Vaginella massiliensis” (mas.si.li.en'sis. L. gen. adj. massiliensis, from Massilia, the
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Latin name of Marseille, France, where the organism was first grown, identified and
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characterized).
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MALDI-TOF MS spectrum accession number. The MALDI-TOF MS spectrum of “Vaginella
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massiliensis” is available at http://www.mediterranee-
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infection.com/article.php?laref=256&titre=urms-database.
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Nucleotide sequence accession number. The 16S rRNA gene sequence was deposited in
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EMBL-EBI under accession number LT223570.
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Deposit in culture collection. Strain Marseille P2517 was deposited in the collection “Deutsche
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Sammlung von Mikroorganismen” (DSM) and in the “Collection de Souches de l’Unité des
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Rickettsies” (CSUR, WDCM 875) under numbers 102346 and P2517, respectively.
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Acknowledgments
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This research is funded by the Méditerranée-Infection Foundation.
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Figure 1. Phylogenetic tree highlighting the phylogenetic position of “Vaginella massiliensis”
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strain Marseille P2517T relative to other species close members of Flavobacteriaceae. GenBank
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accession numbers are indicated after the name in brackets. Sequences were aligned using
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CLUSTALW, and phylogenetic inferences obtained using the approximately maximum-
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likelihood method within the Mega6 Software. Numbers at the nodes are percentages of bootstrap
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values obtained by repeating the analysis 500 times to generate a majority consensus tree. Only
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the bootstraps score equal or greater than 95% were retained. The scale bar indicates a 2%
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nucleotide sequence divergence.
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