A. Pironti

Sex-dependent gastrointestinal colonization resistance to MRSA is microbiota and Th17 dependent

This study shows female mice clear MRSA from the gut faster than males, relying on gut microbiota and Th17 cells, while ovariectomy reduces this resistance.

Microbiota and metabolic adaptation shape Staphylococcus aureus virulence and antimicrobial resistance during intestinal colonization

This study shows that gut microbiota depletion allows MRSA to adapt through genetic changes that enhance colonization fitness but reduce antimicrobial resistance and virulence.

Prophage-encoded methyltransferase drives adaptation of community-acquired methicillin-resistant Staphylococcus aureus

This study identifies a prophage-encoded methyltransferase, pamA, that enhances virulence in CA-MRSA by epigenetically upregulating fnbA, promoting biofilm formation and abscess size.

Identification of a proteolysis regulator for an essential enzyme in Mycobacterium tuberculosis

The paper identifies CoaX, a pseudokinase, and pantothenate as regulators of proteasomal degradation of the pantothenate synthesis enzyme PanB in M. tuberculosis.

Quorum-sensing agr system of Staphylococcus aureus primes gene expression for protection from lethal oxidative stress

This study shows that the agr quorum-sensing system in Staphylococcus aureus primes the bacteria to resist oxidative stress by controlling reactive oxygen species, even when the system is not actively activated.

Aldehyde accumulation in Mycobacterium tuberculosis with defective proteasomal degradation results in copper sensitivity

This study shows aldehyde accumulation in M. tuberculosis with defective proteasomal degradation causes copper sensitivity by impairing copper resistance proteins.

Aldehyde inactivation of the RicR regulon sensitizes Mycobacterium tuberculosis to copper

This study shows aldehyde accumulation in M. tuberculosis mutants impairs the RicR regulon, increasing copper sensitivity, and suggests aldehydes may be a host defense mechanism against tuberculosis.

Lupus disease flares are concordant with immune responses to blooms of lipoglycan-expressing Ruminococcus blautia gnavus strains arising from unstable gut microbiota communities

Clostridia isolated from helminth-colonized humans promote hatching of Trichuris muris

The paper isolates and characterizes Clostridia from helminth-colonized humans, showing they promote hatching of Trichuris muris eggs.

Gut microbiome dysbiosis during COVID-19 is associated with increased risk for bacteremia and microbial translocation.

The paper shows that gut microbiome dysbiosis in COVID-19 patients is linked to increased risk of bacteremia and microbial translocation.

Genetic determinants facilitating the evolution of resistance to carbapenem antibiotics

This study identifies genetic factors that facilitate the evolution of carbapenem resistance in Klebsiella pneumoniae, highlighting transposon mutagenesis and mutation spectra as key contributors to resistance development.