pathogen genomics

Population structure of blaKPC-harbouring IncN plasmids at a New York City medical centre and evidence for multi-species horizontal transmission

Host diversity within genetic clusters of blaKPC-harbouring IncN plasmids suggest frequent mobilization of discrete plasmid components.

The Brief Case: A Maggot Mystery-Ignatzschineria larvae Sepsis Secondary to an Infested Wound

This case represents the first conclusive documented human infection with *I. larvae* confirmed by whole-genome sequencing.

Carbapenemase-producing Enterobacterales causing secondary infections during the COVID-19 crisis at a New York City hospital

Increased CPE detection in patients with COVID-19 may signal a re-emergence of these highly resistant pathogens in the wake of the global pandemic. Increased surveillance and antimicrobial stewardship efforts will be needed to mitigate their future impact.

Multidrug-Resistant Organisms & Pathogenic Genomics

Through my postdoctoral research, I have explored genomic and evolutionary characteristics of multidrug-resistant organisms (MDRO), including major public health threats such as carbapenem-resistant Enterobacterales (CRE). I have experience developing, implementing, and analyzing Ion Torrent, Illumina, and Oxford Nanopore sequencing pipelines to study the evolutionary history of MDRO, genomic determinants of multidrug resistance, and transmission and spread of resistance via mobile genetic elements. A major focus has been liver transplant recipients and other immunocompromised hosts, in whom colonizing and infectious MDRO are a major contributor to morbidity and mortality.

Emergence of Polymyxin Resistance in Clinical Klebsiella pneumoniae Through Diverse Genetic Adaptations: A Genomic, Retrospective Cohort Study

A genomic survey of clinical polymyxin-resistant (PR) *K. pneumoniae* reveals remarkably heterogenous molecular mechanisms leading to PR.

Escherichia coli harboring mcr-1 in a cluster of liver transplant recipients: Detection through active surveillance and whole-genome sequencing

We report detection of *mcr-1*-carrying *Escherichia coli* ST117 in a cluster of three liver transplant recipients.

Metabolic adaptation in MRSA pneumonia

MRSA strains adapt to the host airway environment by undergoing substantial bacterial metabolic reprogramming to promote biofilm production and limit the generation of oxidants.

Multidrug-resistant Enterobacter cloacae complex emerging as a global, diversifying threat

In this mini review, we addressed recent advances in the molecular epidemiology of multidrug-resistant *E. cloacae* complex, focusing on the global expansion of CREC.

Clonal background, resistance gene profile, and porin gene mutations modulate in vitro susceptibility to imipenem-relebactam in diverse Enterobacteriaceae

While REL reduced IMI MICs in a majority of diverse CRE isolates, including high-risk clones, chromosomal factors had an impact on IMI-REL susceptibilities and may contribute to elevated MICs.

Genomic and geographic context for the evolution of high-risk carbapenem-resistant Enterobacter cloacae complex clones ST171 and ST78

The remarkable ability of *E. cloacae* complex to acquire and disseminate cross-class antibiotic resistance rather than virulence determinants, coupled with antibiotic pressure, likely led to the wide dissemination of CREC