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Connor Tiffany

@microbe-enjoyer.bsky.social
399 followers 410 following 27 posts

Post Doc exploring the early life gut microbiome in the Zackular lab @ChildrensPhila. Sometimes develops R packages and shiny apps.

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Connor Tiffany @microbe-enjoyer.bsky.social · 03/09/2026
Had a lot of fun collaborating on this. Congrats @haidermanzer.bsky.social and Lex!
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Alex Merz 🇺🇸🇨🇦🇺🇦 @merz.bsky.social · 05/08/2026
#AI #LLM Something I've not seen commented on is the explosion of bot-impeding pages (e.g., via Cloudflare) that now appear before web pages load. The cumulative time waste for human users has got to be in the billions of person-hours. An immense burden imposed on everyone by the AI-bro assholes.
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Carl T. Bergstrom @carlbergstrom.com · 21/07/2026
13. Hence our dismal conclusion: rather than finding that LLMs free us to do a better job of what we were doing before they came along, they shift scientific incentives (and the playing field of academic competition) in ways that compel us to do more and more, faster and faster, less and less well.
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beetle moses @beetlemoses.bsky.social · 01/07/2026
Three panel comic. Panel 1: a three-piece band is giving an interview on a couch. The members are an amoeba, a zooplankton, and a tardigrade, who is holding the microphone. They are all wearing hip clothing and/or holding beers. The tardigrade says, “we just started jamming together.” Panel 2: he continues, “within a year, we were playing sold out shows.” The band is shown playing on stage in front of an excited crowd. On stage is a drum set, a trumpet set on the ground, and an upright bass. The band members are all microscopic so you can’t see them. There is a band logo on the kick drum that’s reads: Cell Culture. Panel 3: Quincy Jones is giving an interview while lounging on a sofa. Smiling, he says, “all I knew was that these cats could swing.”
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Mariana Byndloss @maribyndloss.bsky.social · 13/06/2026
How does the early life microbiota protect the infant against excessive adiposity? Our new preprint describes a mechanism by which specific members of the early life small intestine microbiota regulate intestinal epithelium-immune interactions to prevent adiposity. www.biorxiv.org/content/10.6...
biorxiv.org
Small intestine microbiota development prevents early-life adiposity via IL-22-mediated intestinal PPARα suppression
Perturbation to the early-life microbiota has long-term detrimental effects on health and development, leading to increased risk for metabolic dysfunction and childhood obesity. Despite the central ro...
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Ai Ing Lim @aiinglim.bsky.social · 07/05/2026
We found maternal helminth infection can promote antiviral immunity in offspring 🤱🪱 www.cell.com/cell-host-mi... Don’t worry, we are not suggesting we reinfect everyone with worms! Instead, we identified a microbiota-derived metabolite, Indole-3-propionic acid, that enhances antiviral immunity!
cell.com
Maternal helminths rewire the microbiota to promote offspring antiviral immunity
Fernandes et al. show that maternal helminths, long-standing mammalian partners, confer antiviral immunity to offspring via the microbiota-derived metabolite indole-3-propionic acid (IPA). This work r...
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Rob Kingsley @drrobkingsley.bsky.social · 15/04/2026
Why has the #Salmonella ST34 become a global pandemic clone? The answer is in the #pig gut—and our use of #copper. Our latest research dives into the "copper-modified niche" and how it reshapes the microbiome. link.springer.com/article/10.1... @rafalkolenda.bsky.social @abaumler.bsky.social
link.springer.com
Copper is an intestinal habitat filter affecting the gut microbiota interactions with Salmonella Typhimurium - Microbiome
Background Foodborne pathogens, including Salmonella enterica serovar Typhimurium (S. Typhimurium), pose a significant threat to both human health and livestock productivity. The pandemic S. Typhimuri...
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Mariana Byndloss @maribyndloss.bsky.social · 30/03/2026
Very excited to share our new work from previous Byndloss Lab grad student @shealynicg.bsky.social published today! journals.asm.org/doi/10.1128/...
journals.asm.org
Aspartate aminotransferase is required for Salmonella expansion in the inflamed gut via TCA anaplerosis | Infection and Immunity
Despite being the primary site of digestion, the mammalian gut represents a region of nutrient scarcity for potential invading enteric pathogens such as Salmonella enterica serovar Typhimurium (S. Tm)...
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Joe Zackular @joeyzacks.bsky.social · 30/03/2026
Happy to share this study from the lab led by Orlaith Keenan published in mBio! Working with an outstanding collaborative team, Orlaith demonstrated that maintaining the right balance of neutrophils is key to limiting severe disease during C. difficile infection. journals.asm.org/doi/10.1128/...
journals.asm.org
Pharmacological reduction of neutrophil infiltration reduces Clostridioides difficile infection severity | mBio
Clostridioides difficile remains a leading cause of antibiotic-associated diarrhea worldwide and a major healthcare burden. While antibiotics are commonly used to treat CDI, high antibiotic resistance...
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Connor Tiffany @microbe-enjoyer.bsky.social · 19/03/2026
Excited to see this story published! Congrats @jeylee.bsky.social and @abaumler.bsky.social!
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Andreas Bäumler @abaumler.bsky.social · 19/03/2026
Here we show that buildup of uremic toxins during CKD generates nitrate in the colon. Nitrate supports expansion of Enterobacteriaceae, turning them into a major source of uremic toxins. Inhibiting nitrate production (iNOS inhibition) mitigates disease progression. www.science.org/eprint/YGNMK...
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Drew Hryckowian @a-hryckowian.bsky.social · 05/03/2026
Join us in beautiful Madison WI! In addition to the postdoc call I previously announced, I am seeking applicants for a Scientist position. IMO this position is best suited for someone who successfully completed their postdoctoral training, see here for more details: jobs.wisc.edu/jobs/scienti...
jobs.wisc.edu
Scientist I – C. difficile and Gut Microbiome - Madison, Wisconsin, United States
Current Employees: If you are currently employed at any of the Universities of Wisconsin, log in to Workday to apply through the internal application process.Job Category:Academic StaffEmployment Type...
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Sean Gibbons 🦠💩 @gibbological.bsky.social · 19/02/2026
Our latest is out today in @plosbiology.org: "Metabolic modeling reveals determinants of prebiotic and probiotic treatment efficacy across multiple human intervention trials" @isbscience.org @uwbioe.bsky.social @uwgenome.bsky.social doi.org/10.1371/jour...
doi.org
Metabolic modeling reveals determinants of prebiotic and probiotic treatment efficacy across multiple human intervention trials
Prebiotic and probiotic interventions can induce therapeutically relevant shifts in the human microbiome, but their effects are variable across individuals. This study shows that metabolic models can ...
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Connor Tiffany @microbe-enjoyer.bsky.social · 10/02/2026
Very cool study and impressive work! Congrats! @qianxuan.bsky.social
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Sean Gibbons 🦠💩 @gibbological.bsky.social · 26/01/2026
Check out our review on emerging technologies for diet tracking in Nature Food. 👇 This paper was led by @catalinacuparencu.bsky.social, with @cdiener.com and others: www.nature.com/articles/s43... @isbscience.org @uwbioe.bsky.social @uwgenome.bsky.social
nature.com
Integration of modern technologies to advance dietary assessment - Nature Food
Accurately measuring dietary intake has long been a challenge in nutrition research. Integrating emerging tools with multisampling strategies and a dietary assessment methodology aligned with the rese...
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The Center for Microbial Medicine at CHOP @centermicrobialmed.bsky.social · 16/01/2026
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-...
research.chop.edu
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.
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Eric Topol @erictopol.bsky.social · 08/01/2026
Here's a summary of all the data that supports adding more red meat to your diet
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Carl T. Bergstrom @carlbergstrom.com · 17/12/2025
As far as I can tell, RFK Jr.'s latest antivax stunt runs counter to the WMA Declaration of Helsinki. Withholding HepB vaccination clearly does not meet any definition of clinical equipoise. Doing it anyway, overseas, is straight up colonialist medicine. Details in Dr. Jacobs's thread below.
Use of Placebo

    The benefits, risks, burdens, and effectiveness of a new intervention must be tested against those of the best proven intervention(s), except in the following circumstances:

    If no proven intervention exists, the use of placebo, or no intervention, is acceptable; or
    If for compelling and scientifically sound methodological reasons the use of any intervention other than the best proven one(s), the use of placebo, or no intervention is necessary to determine the efficacy or safety of an intervention; and the participants who receive any intervention other than the best proven one(s), placebo, or no intervention will not be subject to additional risks of serious or irreversible harm as a result of not receiving the best proven intervention.

Extreme care must be taken to avoid abuse of this option.
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Nandita Garud @nanditagarud.bsky.social · 17/12/2025
Grateful to share our paper on gene-specific selective sweeps in human gut microbiomes, now out in Nature! It has been a joy to work with @rwolff.bsky.social, whose insights and hard work made this possible. www.nature.com/articles/s41...
nature.com
Gene-specific selective sweeps are pervasive across human gut microbiomes - Nature
Development and application of the integrated linkage disequilibrium score (iLDS) reveals both selective pressures impacting the human gut microbiome and the mechanisms by which gut bacteria adapt to ...
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Joe Zackular @joeyzacks.bsky.social · 19/11/2025
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
keysym.us
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!
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Sean Gibbons 🦠💩 @gibbological.bsky.social · 18/11/2025
Don't miss out on our free virtual symposium (Dec. 12th) focused on microbial metabolites and their effects on the host. Sponsors: @amiposts.bsky.social, Pendulum, & Liv (@zymoresearch.bsky.social) Registrants will receive free memberships to Applied Microbiology International. Details below 👇
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Michael Baym @baym.lol · 11/11/2025
PSA for people with NIH grant periods starting January 1st (including most NIGMS MIRAs): your RPPR is due Saturday, but they haven’t sent out the usual automated reminders, presumably due to the shutdown
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Nature Microbiology @natmicrobiol.nature.com · 07/11/2025
#NewResearch Strain displacement in microbiomes via ecological competition @erikbakkeren.bsky.social #microsky www.nature.com/articles/s41...
nature.com
Strain displacement in microbiomes via ecological competition - Nature Microbiology
Mathematical modelling and experimental tests reveal principles that govern displacement of a resident strain by an invader in microbial communities.
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Elaine Hsiao @pipethero.bsky.social · 25/09/2025
Happy to share this paper in final form rdcu.be/eH8tj, with more info on neuronal responses and potential mechanism of actions! The results suggest that there is neural interoception of microbial metabolic state 🧠🦠 We hope they can inspire more work in this area!
rdcu.be
Complex carbohydrate utilization by gut bacteria modulates host food consumption
Nature Communications - Gut bacteria digest dietary fiber and release molecules as energy for the host. Here, Yu et al. find that the ability of certain gut bacteria to digest different fibers...
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Shirli Cohen, PhD @microshirli.bsky.social · 25/09/2025
Preprint alert! I’m excited to share my work identifying and characterizing the impact of fungal-bacterial nutrient sharing in the vaginal tract 🦠
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Drew Hryckowian @a-hryckowian.bsky.social · 24/09/2025
Thrilled to share @alex-dobrila.bsky.social’s new review in Infection & Immunity on how butyrate shapes C. difficile pathogenesis. A must-read for those interested in microbiome–pathogen interactions. 👉 journals.asm.org/doi/10.1128/...
journals.asm.org
The emerging view on the roles of butyrate in Clostridioides difficile pathogenesis | Infection and Immunity
The Centers for Disease Control and Prevention classifies Clostridioides difficile as an urgent threat to the nation’s health, as it causes 450,000 infections, 15,000 deaths, and 1 billion dollars in excess healthcare costs per year in the United States (1, 2). Most C. difficile infections (CDIs) occur in healthcare settings, where CDI is the most common cause of infectious diarrhea (3). Known and suspected risk factors for CDI include antibiotics, proton pump inhibitors, impaired immune function, advanced age, and diet, all of which are associated with dysbiotic gastrointestinal (GI) microbiomes (4–6). Though most CDIs are associated with antibiotic treatment, 22% of individuals with community-acquired CDI have no recent history of antibiotic use. Factors affecting persistent and recurrent CDIs remain poorly defined (7, 8). Despite the morbidity and mortality caused by C. difficile, up to 15% of healthy adults are asymptomatic carriers of toxigenic C. difficile (9), highlighting the gaps in our understanding of C. difficile.
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Connor Tiffany @microbe-enjoyer.bsky.social · 13/09/2025
Happy to see this out and congrats to lead author Anaïs! Sulfide is an under explored metabolite in the gut due to its volatility making quantification very difficult, so it's exciting to see new research out exploring its effects on the microbiota!
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Judith Behnsen @judith-behnsen.bsky.social · 03/09/2025
Excited to share our new publication, out today in Nature! www.nature.com/articles/s41.... @kanchanj.bsky.social led this fascinating fungal-bacterial interaction project. We are grateful for our wonderful collaborators Brian Peters and David Underhill.
nature.com
Commensal yeast promotes Salmonella Typhimurium virulence - Nature
Commensal Candida albicans enhances the virulence and dissemination of Salmonella enterica subsp. enterica serovar Typhimurium.
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Connor Tiffany @microbe-enjoyer.bsky.social · 20/08/2025
And here is a link to the Gibbons Lab paper!
cell.com
Personalized Clostridioides difficile colonization risk prediction and probiotic therapy assessment in the human gut
Carr et al. show how microbial community-scale metabolic models (MCMMs) predict personalized Clostridioides difficile colonization risk and probiotic efficacy. MCMMs reveal key metabolic strategies ex...
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Connor Tiffany @microbe-enjoyer.bsky.social · 20/08/2025
Happy to see the preview @joeyzacks.bsky.social and I wrote on the excellent paper recently published by the Gibbons Lab @gibbological.bsky.social is in press! I'd encourage folks interested in bacterial pathogenesis or microbial ecology to check out the preview and the research article!
sciencedirect.com
Microbial bellwether: Community-scale metabolic modeling to predict infection
Microbial colonization is shaped by a complex network of interactions that influence both commensals and pathogens, including the public-health threat…
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Fabian Rivera-Chávez @fabianrchavez.bsky.social · 18/08/2025
1/ Excited to share the first preprint from my lab! 🎉 My postdoc Paz asked how cholera toxin (CT) helps Vibrio cholerae thrive in the gut. Turns out, CT rewires epithelial metabolism toward L-lactate production—fueling pathogen growth in the small intestine during disease
biorxiv.org
Cholera toxin-induced disease generates epithelial cell-derived L-lactate that promotes Vibrio cholerae growth in the small intestine
Cholera toxin (CT) promotes Vibrio cholerae colonization by altering gut metabolism to favor pathogen growth. We have previously found that CT-induced disease leads to increased concentrations of L-la...
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Ashley Weiss (she/her) @ashleyweiss.bsky.social · 13/08/2025
I’m excited to share my recent study from the labs of @joeyzacks.bsky.social and @ritatamayo.bsky.social on the impact of E.faecalis on phase variable behaviors in C.difficile. This work was achieved through amazing co-leadership with PhD candidate Jilarie Santos-Santiago.
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AG Holdier (Academic Job Applicant Edition) @agholdier.bsky.social · 07/08/2025
A meme of Dr Manhattan sitting on Mars, quietly looking into space. All three panels have nearly identical captions: 

1. It is Sep 2024. OpenAI celebrates GPT-o1 as a "PhD-level" intelligence

2. It is Jan 2025. OpenAI celebrates GPT-o3 as a "PhD-level" intelligence

3. It is Aug 2025. OpenAI celebrates GPT-5 as a "PhD-level" intelligence
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Sean Gibbons 🦠💩 @gibbological.bsky.social · 06/08/2025
💥Personalized C. difficile colonization risk prediction and probiotic therapy assessment in the human gut💥 I'm very excited about this work, driven by Alex Carr & co-supervised by @cdiener.com @cp-cellsystems.bsky.social @isbscience.org @nitinbaliga.bsky.social www.cell.com/cell-systems... 🧵...
cell.com
Personalized Clostridioides difficile colonization risk prediction and probiotic therapy assessment in the human gut
Carr et al. show how microbial community-scale metabolic models (MCMMs) predict personalized Clostridioides difficile colonization risk and probiotic efficacy. MCMMs reveal key metabolic strategies ex...
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Connor Tiffany @microbe-enjoyer.bsky.social · 06/08/2025
This is fantastic work and I'm excited to see it in press! Congrats to all involved!
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Connor Tiffany @microbe-enjoyer.bsky.social · 05/08/2025
Happy to see that this fantastic work is in press now! Congrats to the Palmer lab and lead authors @xiaomeiren.bsky.social and @rmasonclark.bsky.social.
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Sean Gibbons 🦠💩 @gibbological.bsky.social · 31/07/2025
You can get an accurate estimate of total bacterial biomass from stool metagenomes by simply normalizing by host read count, without needing any additional measurements. Excellent work by UW Master's student Gechlang Tang in @asm.org #mSystems Journal. journals.asm.org/doi/10.1128/... 🧵
journals.asm.org
Metagenomic estimation of absolute bacterial biomass in the mammalian gut through host-derived read normalization | mSystems
In this study, we asked whether normalization by host reads alone was sufficient to estimate absolute bacterial biomass directly from stool metagenomic data, without the need for synthetic spike-ins, ...
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Hank Green @hankgreen.bsky.social · 28/07/2025
I doubt that there is a single family in America that hasn’t benefitted directly from the NIH.
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Joe Zackular @joeyzacks.bsky.social · 26/07/2025
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!
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Connor Tiffany @microbe-enjoyer.bsky.social · 16/07/2025
This is anectodal, but for my own coding the only things that AI can do correctly I can do quicker than it takes to write a prompt that generates something useful. I figured productivity gains were over hyped but yikes lol
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Connor Tiffany @microbe-enjoyer.bsky.social · 27/06/2025
Philly will stop functioning if these cuts happen, and if Philly doesn't function, Pennsylvania's economy will crash and burn.
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Connor Tiffany @microbe-enjoyer.bsky.social · 27/06/2025
The Republican majority leader's comments about 300 million being too expensive of an investment while the state has a deficit makes about as much sense as a marathon runner in second place deciding to amputate their legs because they increase the need for blood flow and oxygen.
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Brendan Nyhan @brendannyhan.bsky.social · 15/06/2025
WTF is this - why is NPR quoting some obscure health policy guy from a think tank both sides-ing miasma theory?
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Connor Tiffany @microbe-enjoyer.bsky.social · 15/06/2025
Hey @npr.org, "strengthening" ones immune system with healthier habits won't prevent a measels infection. If you lack the expertise to challenge the validity of a statement ask an actual scientist. Embarrassing to end this piece like that. Also, the miasma theory isn't just outdated, it's false.
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lastpositivist.bsky.social @lastpositivist.bsky.social · 29/05/2025
This should absolutely be a scandal which people lose their jobs over. You'd have to assume that anyone in power actually cares though to think that would happen, which obviously would be a bold assumption in present circumstances.
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Berna Devezer @devezer.bsky.social · 27/05/2025
There is no "science-wide replication crisis" because every word in that phrase carries unfounded assumptions. 🧵 1. There is no evidence that progress has generally stalled in the sciences. Also, no one has actually tried to estimate replicability across fields.
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Joe Zackular @joeyzacks.bsky.social · 16/05/2025
Excited to share our new work in @aga-gastro.bsky.social! We show that dietary fiber alters the window of susceptibility to C. difficile following antibiotic exposure. This really fantastic study was co-led by an amazing team @rinniehewlett.bsky.social @alhecht.bsky.social and Amanda PeBenito.
gastrojournal.org
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 ...
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Joe Zackular @joeyzacks.bsky.social · 09/05/2025
Delighted to announce the @keystonesymposia.bsky.social meeting: Beyond #Antibiotics: Emerging Strategies Combating #BacterialInfection. Join us in Breckenridge in May 2026!! You can check out the program and amazing lineup of speakers below: keysym.us/KSAntibiotics26 #KSAntibiotics26
keysym.us
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!
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Connor Tiffany @microbe-enjoyer.bsky.social · 14/04/2025
Hopefully more universities do the same. Nice to see some good news for once.
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Dr. Sunny Shin @sunnyshinlab.bsky.social · 02/04/2025
Thrilled to share our @elife.bsky.social paper "Inflammasomes primarily restrict cytosolic Salmonella replication within human macrophages" by 1st author Dr. @marisaegan.bsky.social (@cambupenn.bsky.social alum, now faculty @swarthmorecollege.bsky.social)! elifesciences.org/articles/90107 🧵(1/n)
elifesciences.org
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