Congratulations to the newly minted Dr. @rinniehewlett.bsky.social on an amazing thesis defense!! Super proud of all you’ve accomplished exploring how nutrition and ecology shape susceptibility to C. diff. Excited to watch what’s to come next in the Tufts IRACDA Program and in Aimee Shen’s lab!!
The Center for Microbial Medicine at CHOP
@centermicrobialmed.bsky.social
The Center for Microbial Medicine at the Children’s Hospital of Philadelphia is dedicated to finding cures and improving pediatric health through the lens of the microbiome. https://www.research.chop.edu/center-for-microbial-medicine
Join our team! The Center for Microbial Medicine and the CHOP Microbiome Center are seeking a new Resource Coordinator to support our research programs and institutional core facilities. @centermicrobialmed.bsky.social chop.wd108.myworkdayjobs.com/CHOPExternal...
Resource Coordinator III - Center for Microbial Medicine & Microbiome Center
SHIFT: Day (United States of America) Seeking Breakthrough Makers Children’s Hospital of Philadelphia (CHOP) offers countless ways to change lives. Our diverse community of more than 20,000 Breakthrou...
chop.wd108.myworkdayjobs.com
So excited to have been selected for this recognition by BWF PDEP and am ever more inspired to continue the work I have done and hope to do to follow in the footsteps of past and current mentor(s)!
Super proud of Zackular Lab postdoc @shealynicg.bsky.social for receiving @bwfund.bsky.social PDEP! This is well-deserved recognition of Nic's incredible work and potential.Thank you to @bwfund.bsky.social for supporting Nic and this amazing cohort of future leaders! www.bwfund.org/news/2026-po...
Super proud of Zackular Lab postdoc @shealynicg.bsky.social for receiving @bwfund.bsky.social PDEP! This is well-deserved recognition of Nic's incredible work and potential.Thank you to @bwfund.bsky.social for supporting Nic and this amazing cohort of future leaders! www.bwfund.org/news/2026-po...
2026 Postdoctoral Enrichment Program Recipients Announced - Burroughs Wellcome Fund
DURHAM, N.C. — The Burroughs Wellcome Fund and The Charles H. Revson Foundation are pleased to announce the recipients of the 2026 Postdoctoral Enrichment Program (PDEP) awards, providing career-devel...
bwfund.org
📣 The Center for Microbial Medicine is now on LinkedIn! Join our community and stay in the know! @centermicrobialmed.bsky.social www.linkedin.com/company/chop...
The Center for Microbial Medicine at CHOP | LinkedIn
The Center for Microbial Medicine at CHOP | 19 followers on LinkedIn. Dedicated to finding cures and improving pediatric health through the lens of the microbiome | The Center for Microbial Medicine a...
linkedin.com
Yesterday we moved into the new Morgan Center for Research and Innovation at @childrensphila.bsky.social. This new space will be home to the Moustafa Lab, the CHOP Microbiome Sequencing Core, and CMM @centermicrobialmed.bsky.social. We are already getting ready to be back at the bench next week.1/2
The Moustafa Lab and the @centermicrobialmed.bsky.social are ready for the World Cup!! Enjoy the games, everyone!
Here is our latest on finding recombination in microbial genomes. No alignment, no phylogeny. Just information theory. Congrats Apurva and the whole team! This one was a pongvtime coming. academic.oup.com/mbe/article/...
What Do We Gain When Tolerating Loss? The Information Bottleneck Wrings Out Recombination
Abstract. Most microbes have the capacity to acquire genetic material from their environment. Recombination of foreign DNA yields genomes that are, at leas
academic.oup.com
Proud to be part of this group! journals.asm.org/doi/10.1128/...
Geographic divergence of methicillin-resistant Staphylococcus aureus ST5-SCCmecI in the aftermath of a major earthquake and tsunami: impact of a plasmid harboring heavy metal resistance genes | mBio
Methicillin-resistant Staphylococcus aureus (MRSA) is a major cause of life-threatening infections worldwide and a growing public health concern. The rise of antibiotic-resistant bacteria, such as MRSA, is often linked to genetic adaptations that enhance ...
journals.asm.org
Ever struggled with a good SNP threshold for transmission analysis? As part of our paper, we made the bioinformatics pipeline available and we deeply investigated and developed new methods for this purpose. Check it out!
We’ve made our analytical pipeline THRESHER publicly available! Just provide your genomes and it handles strain and/or cluster composition, and generates quality visualizations for you. Easy to install,thoroughly documented,and validated on published datasets and simulations. Manuscript coming soon!
Over 3 years we performed WGS-based surveillance of S. aureus in the NICU at @childrensphila.bsky.social, sequencing both surveillance and bloodstream infection isolates, to understand how colonization, transmission, and persistence are associated with invasive infection in high-risk neonates.
Rapid dissemination of Staphylococcus aureus in the neonatal intensive care unit is associated with invasive infection - Nature Communications
In this work, authors use whole genome tracking in a neonatal intensive care unit to reveal a strong link between Staphylococcus aureus colonization and invasive infection, pinpointing critical new ta...
nature.com
Researchers from @centermicrobialmed.bsky.social @chopresearch.bsky.social identify strategies for preventing the most infectious strains of Staph aureus. @pjplanet.bsky.social @ahmedmicrobes.bsky.social @qianxuan.bsky.social @joeyzacks.bsky.social
Children’s Hospital of Philadelphia, Penn Medicine Researchers Identify Strategies for Preventing the Most Infectious Strains of S. aureus in the NICU
A new study has identified which strains of Staphylococcus aureus – commonly known as staph – are commonly transmitted in neonatal intensive care units. A new study led by researchers at Children’s Hospital of Philadelphia (CHOP) and the Perelman School of Medicine at the University of Pennsylvania (Penn Medicine) has identified which strains of Staphylococcus aureus – commonly known as staph – are commonly transmitted in neonatal intensive care units and which specific strains are most likely to cause invasive and serious infections.The findings, published today in Nature Communications, offer a critical blueprint for precision surveillance of staph in the NICU and provide an important foundation for reducing infections in vulnerable newborns.Staphylococcus aureus is a bacterium often found on the skin and in the noses of healthy people. While usually harmless, certain strains can cause anything from mild skin infections to more serious bloodstream infections and pneumonia. A recent study found that one in four healthcare-acquired infections in very preterm U.S. infants were due to staph. Lakshmi Srinivasan, MD, FAAP As part of bi-monthly surveillance sampling at CHOP led by co-lead author Lakshmi Srinivasan, MD, an attending physician in the Division of Neonatology and the Pediatric Sepsis Program, nurses routinely swab the noses of babies in the neonatal intensive care unit (NICU) to test for the presence of these bacteria. However, there are currently no standard approaches for NICU surveillance of staph, and there is little evidence for when to begin or stop surveillance, how frequently to test, and which patients to closely monitor. Joseph P. Zackular, PhD “Staph is a critical human pathogen and a major cause of severe infection in our highest-risk infants,” said co-senior study author Joseph Zackular, PhD, a researcher in the Department of Pathology and Laboratory Medicine and Co-Director of the Center for Microbial Medicine at CHOP. “In this study, we brought together basic researchers, clinicians, and computational biologists in a highly collaborative effort to address a major challenge in pediatric health.”Utilizing expertise in CHOP’s NICU, the Center for Microbial Medicine, the Infectious Disease Diagnostics Laboratory, and the Microbiome Sequencing Center, researchers performed precision surveillance of invasive infections of staph in high-risk infants with the goal of identifying new strategies for prevention and control. Over three years, whole-genome sequencing showed that shared spaces and physical proximity were major drivers of staph transmission. Stable colonization by two types of staph, MSSA and MRSA, occurred across all areas within the NICU, and an analysis of more than 1,000 staph genomes revealed strain-specific persistence and colonization patterns, with MSSA causing more colonization and invasive disease than MRSA. Ahmed M. Moustafa, BPharm, PhD “Our study demonstrated that certain strains of staph pose significantly greater risk by being more transmissible and potentially more invasive, suggesting that a more effective prevention strategy might isolate and target the strains that cause the most infections,” said co-senior study author Ahmed M. Moustafa, BPharm, PhD, a researcher in the Division of Gastroenterology, Hepatology and Nutrition and Co-Director of the Center for Microbial Medicine at CHOP and the Sequencing Core Director of the CHOP Microbiome Center. Paul J. Planet, MD, PhD “This study provides a path forward for real-time interventions and improved surveillance that we hope can be implemented in NICUs around the country and improve the health and safety of preterm infants,” said co-senior study author Paul J. Planet, MD, PhD, an attending physician in the Division of Infectious Diseases at Children's Hospital of Philadelphia and Co-Director of the Center for Microbial Medicine at CHOP.This study was supported by the Center for Microbial Medicine at the Children’s Hospital of Philadelphia and National Institutes of Health grant 1R01AI185544.She et al, “Rapid dissemination of Staphylococcus aureus in the neonatal intensive care unit is associated with invasive infection.” Nat Commun. Online February 9, 2026. DOI: 10.1038/s41467-026-69074-z
chop.edu
Thrilled to share this study tracking Staph aureus carriage and transmission across the NICU using genomics! Work done w @pjplanet.bsky.social & @ahmedmicrobes.bsky.social and made possible by @centermicrobialmed.bsky.social. Study co-led by the amazing @qianxuan.bsky.social & Lakshmi Srinivasan!
Thrilled to share this study tracking Staph aureus carriage and transmission across the NICU using genomics! Work done w @pjplanet.bsky.social & @ahmedmicrobes.bsky.social and made possible by @centermicrobialmed.bsky.social. Study co-led by the amazing @qianxuan.bsky.social & Lakshmi Srinivasan!
Rapid dissemination of Staphylococcus aureus in the neonatal intensive care unit is associated with invasive infection - Nature Communications
In this work, authors use whole genome tracking in a neonatal intensive care unit to reveal a strong link between Staphylococcus aureus colonization and invasive infection, pinpointing critical new ta...
nature.com
Center for Microbial Medicine clinicians and researchers team up to tackle bacterial infections in NICUs. Check out the amazing work being done by @pjplanet.bsky.social @ahmedmicrobes.bsky.social Lakshmi Srinivasan and more! @chopresearch.bsky.social www.research.chop.edu/cornerstone-...
The Science Behind the Spread: Researchers Aim to Reduce Bacterial Burden in NICUs
Researchers are using whole genome sequencing techniques to identify possible high-risk strains of bacteria in neonatal intensive care units.
research.chop.edu
Proud to announce SimPhyNI, a new tool for bacterial GWAS with higher precision and scalability than existing tools. Try it out and let us know what you think!!
High Precision Binary Trait Association on Phylogenetic Trees https://www.biorxiv.org/content/10.64898/2025.12.24.696407v1
Really happy to have this study led by @ashleyweiss.bsky.social and Jilarie Santos-Santiago published in the Journal of Bacteriology (@asm.org) over the holiday break!! Always awesome to team up with the amazing @ritatamayo.bsky.social lab! #Cdiff #enterococci journals.asm.org/doi/10.1128/...
Enterococcus faecalis modulates phase variation in Clostridioides difficile | Journal of Bacteriology
Clostridioides difficile is an enteric pathogen with critical implications for public health. The microbial ecosystem in which C. difficile resides shapes the behavior and fitness of C. difficile; how...
journals.asm.org
Excited to share this collaborative study with @ritatamayo.bsky.social showing that E. faecalis influences C. diff morphology through the phase variable CmrRST system! This work was co-led by the amazing team of @ashleyweiss.bsky.social and Jilarie Santos-Santiago!
Happy New Year, all! Reminder that the deadline for abstract selected talks is Jan 7th for @keystonesymposia.bsky.social meeting "Beyond Antibiotics: Emerging Strategies Combating Bacterial Infection." Register today and join us in Breckenridge!! It is going to be an awesome meeting!
Registration is now open for @keystonesymposia.bsky.social "Beyond #Antibiotics: Emerging Strategies Combating #BacterialInfection." Deadline for scholarships and abstract selected short talks is Jan 7! Join us this May for an amazing meeting! keysym.us/KSBeyondAntibiotics26 #KSBeyondAntibiotics26
The Center for Microbial Medicine at CHOP is delighted to be a sponsor for this important @keystonesymposia.bsky.social meeting on emerging strategies for combating AMR! Come find us at the meeting!
Registration is now open for @keystonesymposia.bsky.social "Beyond #Antibiotics: Emerging Strategies Combating #BacterialInfection." Deadline for scholarships and abstract selected short talks is Jan 7! Join us this May for an amazing meeting! keysym.us/KSBeyondAntibiotics26 #KSBeyondAntibiotics26
And of course, super lucky to be planning this meeting with an amazing team: @kimingeneva.bsky.social @dariavantyne.bsky.social @maribyndloss.bsky.social. #KSBeyondAntibiotics26
Registration is now open for @keystonesymposia.bsky.social "Beyond #Antibiotics: Emerging Strategies Combating #BacterialInfection." Deadline for scholarships and abstract selected short talks is Jan 7! Join us this May for an amazing meeting! keysym.us/KSBeyondAntibiotics26 #KSBeyondAntibiotics26
Beyond Antibiotics: Emerging Strategies for Combating Bacterial Infection | Keystone Symposia
Join us at the Keystone Symposia on Beyond Antibiotics: Emerging Strategies for Combating Bacterial Infection, May 2026, in Breckenridge, with field leaders!
keysym.us
We are incredibly grateful for the generous support we have received for @centermicrobialmed.bsky.social. Support from these donors is allowing us to improve pediatric health through the lens of the microbiome and bring precision pathogen surveillance to reduce infections in children.
Donors Join Forces to Support Center for Microbial Medicine at Children’s Hospital of Philadelphia
Donors Join Forces to Support Center for Microbial Medicine at Children’s Hospital of Philadelphia
Donors Join Forces to Support Center for Microbial Medicine at Children’s Hospital of Philadelphia
Today Children’s Hospital of Philadelphia (CHOP) announced funding to support the recently launched Center for Microbial Medicine. This pioneering initiative is made possible by three transformative g...
chop.edu
🦠🧍♀️From bacterial to human immunity. We report in @science.org the discovery of a human homolog of SIR2 antiphage proteins that participates in the TLR pathway of animal innate immunity. Co-led wt @enzopoirier.bsky.social by D. Bonhomme and @hugovaysset.bsky.social www.science.org/doi/10.1126/...
science.org
Excited to share this collaborative study with @ritatamayo.bsky.social showing that E. faecalis influences C. diff morphology through the phase variable CmrRST system! This work was co-led by the amazing team of @ashleyweiss.bsky.social and Jilarie Santos-Santiago!
Enterococcus faecalis modulates phase variation in Clostridioides difficile https://www.biorxiv.org/content/10.1101/2025.07.24.666506v1
Excited to post our first S. aureus preprint on biorxiv! Big congrats to co-first authors, postdocs @anjali20anil.bsky.social and Rezia Braza, and really enjoyed the collaboration with @torreslab.bsky.social !
Staphylococcus aureus exhibits spatiotemporal heterogeneity in Sae activity during kidney abscess development https://www.biorxiv.org/content/10.1101/2025.07.08.663646v1
Congratulations to @haidermanzer.bsky.social on being awarded the @bwfund.bsky.social Postdoc Diversity Enrichment Program Award!! So well deserved - we are very proud here in the Zackular Lab!
BWF is proud to announce the 2025 recipients of its Postdoctoral Diversity Enrichment Program (PDEP), which provides critical support to postdoctoral researchers pursuing careers in biomedical and medical research. www.bwfund.org/news/bwf-ann... #bwfpdep
Congratulations to Dr. Alexa Semon on successfully defending her thesis yesterday! We are incredibly proud of all that you accomplished during your time in the Zackular Lab. We’re sad to see you go, but know that you’ll do amazing things at @regeneron.com! @upenn.edu @chopresearch.bsky.social
Incredibly honored to be selected as a @bwfund.bsky.social Investigator in the Pathogenesis of Infectious Disease. Thank you to @bwfund.bsky.social for supporting our work - I am thrilled to join this amazing community! And special thank you to my AMAZING team (past & present) for getting us here!
Announcing the 2025 Investigators in the Pathogenesis of Infectious Disease www.bwfund.org/news/announc... #bwfpath
Check out this new work from the Center for Microbial Medicine(@centermicrobialmed.bsky.social) and @upenn.edu! Amanda PeBenito @rinniehewlett.bsky.social @joeyzacks.bsky.social @alhecht.bsky.social and team show that dietary fiber alters risk for C. diff infection following antibiotics.
Dietary fiber modulates the window of susceptibility to Clostridioides difficile infection
Clostridioides difficile epidemiology is rapidly evolving, and understanding the factors that contribute to one’s risk of C. difficile infection (CDI) is urgently needed. Based on our observations in a dietary intervention study, we hypothesized that fiber modulates susceptibility to C. difficile post-antibiotic exposure and investigated this using human specimens and murine models.
secure.jbs.elsevierhealth.com