Fabien Aujoulat

Institut de Recherche pour le Développement

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Estelle Jumas‐Bilak

Laboratoire HydroSciences Montpellier

Hélène Marchandin

Centre Hospitalier Universitaire de Nîmes

Patricia Licznar‐Fajardo

Université de Montpellier

R. Chiron

Centre Hospitalier Universitaire de Montpellier

Agnès Masnou

Laboratoire HydroSciences Montpellier

C. Dupont

Université de Montpellier

Mylène Toubiana

Laboratoire HydroSciences Montpellier

Patrick Monfort

Centre National de la Recherche Scientifique

Sara Romano-Bertrand

Université de Montpellier

Isabelle Zorgniotti

Université de Montpellier

Cooperative Institutions

Université de Montpellier

110

Centre National de la Recherche Scientifique

105

Institut de Recherche pour le Développement

Laboratoire HydroSciences Montpellier

Centre Hospitalier Universitaire de Montpellier

Inserm

Ifremer

Département Santé des Plantes et Environnement

Centre Hospitalier Universitaire de Nîmes

Université Paris Cité

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Évaluation de la sensibilité au céfidérocol d'une collection de 160 souches cliniques d'Achromobacter

Médecine et Maladies Infectieuses Formation (2023)

V. Jean-Pierre Pauline Sorlin E. Brivet Fabien Aujoulat R. Chiron

Achromobacter

Achromobacter xylosoxidans

10.1016/j.mmifmc.2023.03.195

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Dynamics and diversity of Vibrio parahaemolyticus, Vibrio vulnificus, and vibrio cholerae in the Biguglia lagoon, Corsica, France

HAL (Le Centre pour la Communication Scientifique Directe) (2017)

Mylène Toubiana Fabien Aujoulat Dominique Hervio‐Heath Rita R. Colwell Estelle Jumas‐Bilak

Vibrio vulnificus

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Comparative diffusion assay to assess efficacy of topical antimicrobial agents against Pseudomonas aeruginosa in burns care

Annals of Clinical Microbiology and Antimicrobials (2011)

Fabien Aujoulat Françoise Lebreton Sara Romano-Bertrand Milena Delage Hélène Marchandin

Abstract Background Severely burned patients may develop life-threatening nosocomial infections due to Pseudomonas aeruginosa , which can exhibit a high-level of resistance to antimicrobial drugs and has a propensity to cause nosocomial outbreaks. Antiseptic and topical antimicrobial compounds constitute major resources for burns care but in vitro testing of their activity is not performed in practice. Results In our burn unit, a P. aeruginosa clone multiresistant to antibiotics colonized or infected 26 patients over a 2-year period. This resident clone was characterized by PCR based on ERIC sequences. We investigated the susceptibility of the resident clone to silver sulphadiazine and to the main topical antimicrobial agents currently used in the burn unit. We proposed an optimized diffusion assay used for comparative analysis of P. aeruginosa strains. The resident clone displayed lower susceptibility to silver sulphadiazine and cerium silver sulphadiazine than strains unrelated to the resident clone in the unit or unrelated to the burn unit. Conclusions The diffusion assay developed herein detects differences in behaviour against antimicrobials between tested strains and a reference population. The method could be proposed for use in semi-routine practice of medical microbiology.

clone (Java method)

10.1186/1476-0711-10-27

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Citations (10)

Physiological and behavioural responses of Gammarus pulex exposed to acid stress

Comparative Biochemistry and Physiology Part C Toxicology & Pharmacology (2007)

Vincent Felten Guy Charmantier Mireille Charmantier‐Daures Fabien Aujoulat Jeanne Garric

Gammarus pulex

Osmoregulation

Hemolymph

Pulex

10.1016/j.cbpc.2007.09.006

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Citations (34)

Whole-Genome Sequences of a Cluster of 14 Unidentified Related Veillonella sp. Strains from Human Clinical Samples and Type Strains of 3 Veillonella Validated Species

Microbiology Resource Announcements (2019)

Fabien Aujoulat Michel R. Popoff Laure Diancourt Alexis Criscuolo Hélène Jean‐Pierre

We report 17 draft genomes for 14 unidentified Veillonella sp. strains closely related in 16S rRNA gene-based phylogeny and type strains of 3 Veillonella species with the aims of deciphering relationships between related species, evaluating the accuracy of current thresholds for species delineation, and robustly describing new species in the genus.

Veillonella

10.1128/mra.01743-18

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Site RABLez : Résistance aux Antibiotiques dans le Bassin du Lez. Site d’étude de l’antibiorésistance environnementale au cœur de Montpellier (http://rablez.msem.univ-montp2.fr)

HAL (Le Centre pour la Communication Scientifique Directe) (2019)

Patricia Licznar‐Fajardo Estelle Jumas‐Bilak Fabien Aujoulat Agnès Masnou Mylène Toubiana

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Pathobiome: a valuable concept in Cystic fibrosis

HAL (Le Centre pour la Communication Scientifique Directe) (2015)

C. Dupont Fabien Aujoulat Anne Laure Michon Sara Romano-Bertrand Niels Nørskov‐Lauritsen

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Intragenomic and intraspecific heterogeneity in rrs may surpass interspecific variability in a natural population of Veillonella

Microbiology (2010)

Anne-Laure Michon Fabien Aujoulat Laurent Roudière Olivier Soulier Isabelle Zorgniotti

As well as intraspecific heterogeneity, intragenomic heterogeneity between 16S rRNA gene copies has been described for a range of bacteria. Due to the wide use of 16S rRNA gene sequence analysis for taxonomy, identification and metagenomics, evaluating the extent of these heterogeneities in natural populations is an essential prerequisite. We investigated inter- and intragenomic 16S rRNA gene heterogeneity of the variable region V3 in a population of 149 clinical isolates of Veillonella spp. of human origin and in 13 type or reference Veillonella strains using PCR-temporal temperature gel electrophoresis (TTGE). 16S rRNA gene diversity was high in the studied population, as 45 different banding patterns were observed. Intragenomic heterogeneity was demonstrated for 110 (74 %) isolates and 8 (61.5 %) type or reference strains displaying two or three different gene copies. Polymorphic nucleotide positions accounted for 0.5-2.5 % of the sequence and were scattered in helices H16 and H17 of the rRNA molecule. Some of them changed the secondary structure of H17. Phylotaxonomic structure of the population based on the single-copy housekeeping gene rpoB was compared with TTGE patterns. The intragenomic V3 heterogeneity, as well as recombination events between strains or isolates of different rpoB clades, impaired the 16S rRNA-based identification for some Veillonella species. Such approaches should be conducted in other bacterial populations to optimize the interpretation of 16S rRNA gene sequences in taxonomy and/or diversity studies.

Veillonella

10.1099/mic.0.038224-0

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Citations (42)

Susceptibility to cefiderocol of an accurately identified collection of 147 Achromobacter clinical strains

HAL (Le Centre pour la Communication Scientifique Directe) (2023)

Vincent Jean-Pierre Pauline Sorlin E. Brivet Fabien Aujoulat R. Chiron

Achromobacter

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Rarimicrobium hominis gen. nov., sp. nov., representing the fifth genus in the phylum Synergistetes that includes human clinical isolates

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY (2015)

Estelle Jumas‐Bilak Philippe Bouvet Emma Allen‐Vercoe Fabien Aujoulat Paul A. Lawson

Five human clinical isolates of an unknown, strictly anaerobic, slow-growing, Gram-stain-negative, rod-shaped micro-organism were subjected to a polyphasic taxonomic study. Comparative 16S rRNA gene sequence-based phylogeny showed that the isolates grouped in a clade that included members of the genera Pyramidobacter, Jonquetella, and Dethiosulfovibrio; the type strain of Pyramidobacter piscolens was the closest relative with 91.5-91.7 % 16S rRNA gene sequence similarity. The novel strains were mainly asaccharolytic and unreactive in most conventional biochemical tests. Major metabolic end products in trypticase/glucose/yeast extract broth were acetic acid and propionic acid and the major cellular fatty acids were C13 : 0 and C16 : 0, each of which could be used to differentiate the strains from P. piscolens. The DNA G+C content based on whole genome sequencing for the reference strain 22-5-S 12D6FAA was 57 mol%. Based on these data, a new genus, Rarimicrobium gen. nov., is proposed with one novel species, Rarimicrobium hominis sp. nov., named after the exclusive and rare finding of the taxon in human samples. Rarimicrobium is the fifth genus of the 14 currently characterized in the phylum Synergistetes and the third one in subdivision B that includes human isolates. The type strain of Rarimicrobium hominis is ADV70T ( = LMG 28163T = CCUG 65426T).

Strain (injury)

10.1099/ijsem.0.000520

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Citations (14)