Author

Marie Petitjean

InsermORCID 0000-0003-0397-2051Unclaimed ORCID profile · follow to get notified of new preprints

Biology Disciplines

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Signature Assays, Organisms & Methods

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Approach:statistical model· 3 Assay:whole-genome sequencing· 3 Organism:E. coli· 2 Research Focus:chromatin & epigenetic regulation· 1 Research Focus:drug response / drug discovery· 1 Research Focus:host-pathogen & immune response· 1 Organism:human· 1

Frequent Co-Authors

Érick DenamuriD· 3 shared Laurence Armand-LefèvreiD· 2 shared Laurent PoireliD· 2 shared Olivier ClermontiD· 2 shared Signara GueyeiD· 2 shared Thibaut Morel‐JourneliD· 2 shared Valentine BertiiD· 2 shared Alexander MellmanniD· 1 shared

Activity by Year

2024-2026 · peak 2/yr

Co-Author Collaboration Network

10 top collaborators · 35 mutual co-author links

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3 shared papersMicrobiology

Érick DenamurORCID

Mutual co-authors in cluster

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3 papers

Recent·Most cited

MicrobiologybioRxivPreprintOct 8, 2026

Chromosomal integration of blaCTX-M redefines the evolutionary trajectory of antibiotic resistance in E. coli through lineage-structured expansion

Maxime Danjean, Thibaut Morel‐Journel, Valentine Berti…·Laurence Armand-Lefèvre

The paper identifies chromosomal integration of blaCTX-M in E. coli, showing lineage-specific prevalence and suggesting it contributes to the spread of antibiotic resistance.

DOI 10.64898/2026.10.07.757360

E. coliwhole-genome sequencing

𝕏 PostBluesky

MicrobiologyAntimicrobial Agents and ChemotherapyPeer-reviewedJul 10, 2026

Influence of iron uptake systems on cefiderocol activity in Escherichia coli: at the crossroads of antibiotic resistance and virulence

Emilie Mallecot, Valentine Berti, Marie Petitjean…·Laurence Armand-Lefèvre

This study examines how iron uptake systems affect cefiderocol activity in E. coli, showing that the fec operon increases resistance and is linked to virulence.

DOI 10.1128/aac.01679-25

E. coliwhole-genome sequencing

𝕏 PostBluesky

MicrobiologyAntimicrobial Agents and ChemotherapyPeer-reviewedMar 5, 2024

Inter-phylum circulation of a beta-lactamase - encoding gene: a rare but observable event

Rémi Gschwind, Marie Petitjean, Claudine Fournier…·Étienne Ruppé

The paper reports the first inter-phylum transfer of an ESBL-encoding gene, blaMUN-1, between Bacteroidota and Pseudomonadota, highlighting rare but possible horizontal gene transfer events.

10 citations

humanwhole-genome sequencing

𝕏 PostBluesky