Mark J. Walker

This study identifies two mechanisms of cefiderocol resistance in Acinetobacter baumannii: cAMP signalling disruption and Hfq RNA-binding domain truncation, both linked to iron homeostasis and reduced drug activity.

This study shows glycerol inhibits lactose-dependent growth in Streptococcus pyogenes without affecting transcription, while lactose induces distinct transcriptional responses.

The paper examines antibody responses to S. pyogenes antigens in individuals with and without pharyngitis, finding differences in IgG and IgA levels and correlations with prior immunity.

The paper shows extensive genomic overlap between Streptococcus pyogenes and Streptococcus dysgalactiae subsp. equisimilis, including shared genes and recombination events, with implications for vaccine development.

The paper traces the evolution of Streptococcus agalactiae ST-261 isolates, showing their dissemination via imported tilapia and adaptation to marine environments.