In-host evolution of Yersinia enterocolitica during a chronic human infection

Nature Communications

Cyril Savin, Pierre Lê-Bury, Julien Guglielmini, Thibaut Douché, Guillem Mas Fiol, Rodolphe Buzelé, Cécile Le Brun, Frédéric Bastides, Maud François, Béatrice Birmelé, Laura Guichard, Julien Madej, Rémi Beau, Nicolas Cabanel, Laurent Dortet, Mariette Matondo, Olivier Dussurget, Elisabeth Carniel, Philippe Lanotte & Javier Pizarro-Cerdá 

Summary

Bacteria exhibit remarkable adaptability in response to selective pressures encountered during infection and antibiotic treatment. We characterize four Yersinia enterocolitica clonal isolates from successive bacteremia episodes that evolved within an elderly patient over 14 years. Their common evolution is characterized by a genome size reduction resulting in the loss of about a hundred genes and a so far undescribed deletion in the DNA gyrase gene gyrA conferring quinolone resistance. Third-generation cephalosporin resistance of the last isolate correlates with a truncation of OmpF in synergy with an increased production of BlaA and AmpC β-lactamases. A strong proteome remodeling of the isolates reveals a perturbed stringent response, as well as impaired metabolism which substantiate their severe growth defects in vitro, accounting for antibiotics tolerance and possibly therapeutic failure. This study documents previously unreported genetic and phenotypic changes associated with in-host adaptation of a pathogenic Yersinia species under antibiotic pressure.

More information at DOI: https://doi.org/10.1038/s41467-025-60782-6