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Catherine Armbruster

@catarmbruster.bsky.social
1.2K followers 175 following 50 posts

biofilmmaker | assistant professor at Carnegie Mellon | polymicrobial communities & bacterial evolution

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Reposted by Catherine Armbruster
The Conversation U.S. @us.theconversation.com · 22/09/2026
Decades of industrial pollution changed the bacteria living at a former Pittsburgh steel mill. Some evolved to break down toxic chemicals as food! theconversation.com/at-an-old-st...
theconversation.com
At an old steel site in Pittsburgh, bacteria evolved to survive – and eat – industrial pollution
Decades of pollution at Pittsburgh brownfields left bacteria that evolved to survive it – and maybe help clean up contaminated soil.
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Catherine Armbruster @catarmbruster.bsky.social · 22/09/2026
That feeling when 8/21/26-Catherine only allotted 1 lecture for genetic drift on the Evolution syllabus, but 9/21/26-Catherine has too many slides and more to say... 😔
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Reposted by Catherine Armbruster
Nature Microbiology @natmicrobiol.nature.com · 17/09/2026
Out Now! Bacterial growth rate in populations and single cells #MicroSky
go.nature.com
Bacterial growth rate in populations and single cells
Nature Microbiology, Published online: 17 September 2026; doi:10.1038/s41564-026-02449-6In this Perspective, Levin and Wang give a brief history of bacterial growth rate and discuss how it is connected to nutrient availability and macromolecule synthesis, with a focus on (p)ppGpp as a central hub regulating resource allocation and, indirectly, growth rate at the single-cell level.
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Catherine Armbruster @catarmbruster.bsky.social · 17/09/2026
Check out this article I wrote (with help from profession editors!) for @us.theconversation.com on our project that uses principles from ecology & evolution to guide our search for microbes that improve bioremediation of brownfields! @cmuscience.bsky.social theconversation.com/at-an-old-st...
theconversation.com
At an old steel site in Pittsburgh, bacteria evolved to survive – and eat – industrial pollution
Decades of pollution at Pittsburgh brownfields left bacteria that evolved to survive it – and maybe help clean up contaminated soil.
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Reposted by Catherine Armbruster
bioRxivpreprint @biorxivpreprint.bsky.social · 20/07/2026
Bacterial DNA invasion triggers transposable element proliferation and genome expansion www.biorxiv.org/content/10.64898/20…
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Reposted by Catherine Armbruster
Nature Microbiology @natmicrobiol.nature.com · 17/07/2026
Out Now! Predictable shifts in microbial species composition lead to community-wide robustness to environmental stress #MicroSky
go.nature.com
Predictable shifts in microbial species composition lead to community-wide robustness to environmental stress
Nature Microbiology, Published online: 17 July 2026; doi:10.1038/s41564-026-02422-3Environmental stress shifts microbial composition towards species with high growth rates, providing community-wide protection.
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Reposted by Catherine Armbruster
CMU Mellon College of Science @cmuscience.bsky.social · 15/07/2026
What is the best way to deal with bacteria at home? Biological Sciences Professor Catherine Armbruster shares her recommendations in the @seattletimes.com. 🧪 www.seattletimes.com/explore/at-h...
seattletimes.com
Oh, the places germs go | Produced by Seattle Times Marketing
Your home, particularly the damp areas, may be crawling with microbes. Here's how to contain them.
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Reposted by Catherine Armbruster
bioRxivpreprint @biorxivpreprint.bsky.social · 15/07/2026
From Lotka-Volterra Dynamics to Community Assembly: Theory, Topography, and Empirical Applications www.biorxiv.org/content/10.64898/20…
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Catherine Armbruster @catarmbruster.bsky.social · 14/07/2026
From lab scripts to a reproducible bioinformatics pipeline! 💻🧬 Check out this article about @cmu.edu Quantitative Bio & Bioinformatics MS grad from my lab, Katie Wang. FYI - Katie is on the job market in bioinformatics & software development. Happy to connect you! www.cmu.edu/mcs/news-eve...
cmu.edu
Katherine Wang Codes New Tools for Biologists
Carnegie Mellon University graduate Katherine Wang is creating bioinformatics tools to make NCBI analysis more accessible and accelerate breakthroughs in the fight against bacterial diseases.
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Catherine Armbruster @catarmbruster.bsky.social · 07/07/2026
Check out this @seattletimes.com article where Matt Parsek & I give a microbiologist's perspective on cleaning your home! Brb, scrubbing my sink... 🫧https://www.seattletimes.com/explore/at-home/tackling-germs-at-home-like-a-microbiologist/
seattletimes.com
Oh, the places germs go | Produced by Seattle Times Marketing
Your home, particularly the damp areas, may be crawling with microbes. Here's how to contain them.
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Reposted by Catherine Armbruster
STCmicrobeblog @stcmicrobeblog.bsky.social · 06/07/2026
ribosomologists take note👇 #MicroSky
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Reposted by Catherine Armbruster
bioRxivpreprint @biorxivpreprint.bsky.social · 02/07/2026
BacNeMu: neutral mutation spectra reconstruction pipeline for bacteria www.biorxiv.org/content/10.64898/20…
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Reposted by Catherine Armbruster
bioRxivpreprint @biorxivpreprint.bsky.social · 02/07/2026
Genomic impact of the second plague pandemic on three human populations www.biorxiv.org/content/10.64898/20…
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Reposted by Catherine Armbruster
Ákos T Kovács @evolvedbiofilm.bsky.social · 01/07/2026
Feeding the invaders: How metabolic imbalance shapes infection and biofilm development @femsjournals.bsky.social Microbiol Rev from Dan Wozniak academic.oup.com/femsre/advan...
academic.oup.com
Feeding the invaders: How metabolic imbalance shapes infection and biofilm development
Abstract. Infectious and metabolic disorders have risen sharply and pose a significant threat to human populations worldwide. Despite being deemed unrelate
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Reposted by Catherine Armbruster
bioRxivpreprint @biorxivpreprint.bsky.social · 01/07/2026
Genome architecture shapes the evolutionary origins of redundant enhancers in fly and mouse www.biorxiv.org/content/10.64898/20…
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Reposted by Catherine Armbruster
George O'Toole (he/him/his) @geiselbiofilm.bsky.social · 30/06/2026
Pls share: U of Washington has an opening for a tenure-track faculty position at the rank of Assistant Professor. This position is expected to specialize in molecular virology or bacteriology. Here is a link: microbiology.washington.edu/index.php/ne...
microbiology.washington.edu
Micro is Hiring! | UW Microbiology
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Reposted by Catherine Armbruster
STCmicrobeblog @stcmicrobeblog.bsky.social · 29/06/2026
to whom the bell tolls (out of tune) an excellent tutorial !👇
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Reposted by Catherine Armbruster
Jake McKinlay @jakemckinlay.bsky.social · 26/06/2026
Cross-feeding/protection between microbes can promote gene loss, but not always. In this COMICR review, @ofsheff.bsky.social, Ella Chuang, and I discuss the constraints on adaptive gene loss during metabolic interactions. Access for free until Aug 15: authors.elsevier.com/a/1nKlj4tPFp...
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Reposted by Catherine Armbruster
Dr. Tom Frieden @drtomfrieden.bsky.social · 26/06/2026
The screwworm barrier worked for nearly six decades because people funded and staffed it. Because we let down our guard, the vampire pathogen is back, and could cost billions of dollars to control.
tomfrieden.substack.com
We Beat a Vampire Fly in 1966. It’s Back.
Screwworm's return to the U.S. is a study in what happens when preparedness isn’t a priority
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Reposted by Catherine Armbruster
Dan Larremore @danlarremore.bsky.social · 24/06/2026
"Power Law"
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Catherine Armbruster @catarmbruster.bsky.social · 23/06/2026
Absolutely loved my (brief) time in this department! Postdocs on the academic job market, check out this position!!!!
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Reposted by Catherine Armbruster
Fabrice Jean-Pierre @fabricejpierre.bsky.social · 23/06/2026
The M&I department/community at Dartmouth is fantastic. Apply!
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Reposted by Catherine Armbruster
Vaughn Cooper @vscooper.micropopbio.org · 16/06/2026
Rather: small N + strong selection = beneficial mutations linked to DNA repair mutants that ⬆️ mutation supply We tried to be accurate here @catarmbruster.bsky.social www.cell.com/cell-reports... Grateful that evolutionary biology is being used in microbial pathogenesis, now need more pop-gen
cell.com
Adaptation and genomic erosion in fragmented Pseudomonas aeruginosa populations in the sinuses of people with cystic fibrosis
Armbruster et al. find that infection-site biogeography impacts evolution of the opportunistic pathogen, Pseudomonas aeruginosa. In the sinuses of adults with cystic fibrosis, P. aeruginosa residing i...
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Catherine Armbruster @catarmbruster.bsky.social · 04/06/2026
Headed to DC just as soon as I finish packing… #asm2026 #orangeboy
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Reposted by Catherine Armbruster
CMU Mellon College of Science @cmuscience.bsky.social · 04/06/2026
Recent CMU graduate Jingjing Xu investigates how communication shapes patient care. Her research highlights how listening, trust and lived experience can improve health outcomes. 🧪 #WomenInSTEM www.cmu.edu/mcs/news-eve...
cmu.edu
Learning to Listen: Jingjing Xu Brings Humanity to Medicine
Recent Carnegie Mellon University graduate Jingjing Xu earned the Mellon College of Science Gilman Award.
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Catherine Armbruster @catarmbruster.bsky.social · 02/06/2026
Gearing up for my first visit to @asm.org conference since 2011 in New Orleans, when it was called the General Meeting! I’m participating in a panel called: “Poster to Paper — Ask the Experts” on Sunday, June 7 from 11:15am–12:00pm ET. Hope to see you there or at your poster/session(s)!!! 🫡 #asm2026
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Reposted by Catherine Armbruster
ASM @asm.org · 02/06/2026
From zoo wildlife to museum collections, the Smithsonian Institution reveals how microbes shape life across ecosystems. Don’t miss this first-of-its-kind session at #ASMicrobe 2026: eppro01.ativ.me/web/planner.... The event is also open to the public! Register here: myasm.asm.org/eweb/Dynamic...
Smithsonian session at ASM Microbe 2026. Register now.
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Reposted by Catherine Armbruster
Marco Gabrielli @mgabrielli.bsky.social · 20/05/2026
Finally out! Biofilm ecology cannot forget their spatial structure 🦠🌏 Here we look at cm-scale diversity across controlled and uncontrolled conditions and quantify the effect of different sampling methods on the understanding of biofilm ecology doi.org/10.1093/isme... @eawag.bsky.social
academic.oup.com
Small-scale biogeography of biofilms and its implications for sequencing-based studies
Abstract. Biofilm microbial communities are characterized by spatial heterogeneity arising in response to environmental characteristics, random events, and
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Reposted by Catherine Armbruster
Vivek Mutalik @vivekmutalik.bsky.social · 20/05/2026
🎊 New Preprint from phagefoundry.org ! Super excited to share our latest work on generating systematic phage-MDR P. aeruginosa interaction dataset & use of ML to predict phage susceptibility & phage cocktails from target genome sequences alone, w validations www.biorxiv.org/cgi/content/...
Systematic lytic host range characterization of 99 multidrug resistant Pseudomonas aeruginosa strains against 95 diverse double strand DNA phages, and AI/ML workflow to predict phage susceptibility and cocktail formulation based on genomic sequence alone.
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Reposted by Catherine Armbruster
Tami Lieberman @contaminatedsci.bsky.social · 22/05/2026
So, Nat'ralists observe, a Flea Hath smaller Fleas that on him prey, And these have smaller yet to bite 'em, And so proceed ad infinitum: -Jonathan Swift, 1733
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Reposted by Catherine Armbruster
Eli Mehlferber @emehlferber.bsky.social · 20/05/2026
Hey all! Happy to finally join everyone here on Bluesky, and also to share the culmination of my longest-running postdoc project, now on bioRxiv: “Apparent generalism in Pseudomonas aeruginosa is underpinned by convergent cryptic specialization.” www.biorxiv.org/content/10.6...
biorxiv.org
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Catherine Armbruster @catarmbruster.bsky.social · 18/05/2026
Congrats to @cmuscience.bsky.social QBB grad June Qu on her pre-print for BTEXgenie, a tool that IDs BTEX (benzene, toluene, ethylbenzene, xylene) degradation genes in (meta)genomes. Tutorial: github.com/armbrusterla... Part of a new project in my lab inspired by Pittsburgh's brownfields. :)
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Reposted by Catherine Armbruster
Science News @scinews.bsky.social · 13/05/2026
Pasteurized Akkermansia muciniphila MucT for weight loss maintenance in people with overweight and obesity: a controlled randomized trial. #NatureMedicine www.nature.com/articles/s41...
nature.com
Pasteurized Akkermansia muciniphila MucT for weight loss maintenance in people with overweight and obesity: a controlled randomized trial - Nature Medicine
In a randomized trial, pasteurized Akkermansia muciniphila improved weight loss maintenance and metabolic health after a low-energy diet, especially in individuals with initially lower Akkermansia lev...
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Reposted by Catherine Armbruster
Scott McGrath @smcgrath.phd · 17/04/2026
🧪 A record wave of researchers is running in the 2026 mid-terms (700+ applications to 314 Action, which recruits scientists and healthcare specialists). Only 3% of state seats are held by STEM professionals, and many of these recruits are looking to help push science-backed policy solutions again.
nature.com
‘Science needs defending’: record number of researchers run for office in US mid-terms
Many Democrats making the switch to politics are motivated by the Trump administration’s cuts to science — whereas energy and AI are a pull for some Republicans.
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Reposted by Catherine Armbruster
Science News @scinews.bsky.social · 17/04/2026
Silencing lipid catabolism determines longevity in response to fasting www.nature.com/articles/s41...
nature.com
Silencing lipid catabolism determines longevity in response to fasting - Nature Communications
The relative contribution of lipid catabolism on fasting-induced longevity was unknown. Authors showed lifespan extension from fasting depend on silencing lipid catabolism upon nutrient replenishment ...
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Reposted by Catherine Armbruster
Ferric Fang, MD @fangferric.bsky.social · 17/04/2026
Invasive Hib infections are spreading in Pacific Northwest cities, predominantly among adults with unstable housing and illicit drug use.
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Reposted by Catherine Armbruster
STCmicrobeblog @stcmicrobeblog.bsky.social · 06/04/2026
Nitrogen Obsession by Roberto — A brief history of how organisms get their nitrogen.
smallthingsconsidered.blog
Nitrogen Obsession
by Roberto — A brief history of how organisms get their nitrogen.
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Reposted by Catherine Armbruster
CMU Mellon College of Science @cmuscience.bsky.social · 30/03/2026
Carnegie Mellon University researchers, like @catarmbruster.bsky.social are exploring whether microbes can help clean up what the steel industry left behind. 🧪 #WomenInSTEM www.cmu.edu/mcs/news-eve...
cmu.edu
Hidden Helpers: Pittsburgh’s Industrial Past Might Hold the Key to a Cleaner Future
Pittsburgh has reinvented itself from a steel powerhouse to a hub for health care and education. But the city’s industrial past left a hidden legacy: toxic compounds like benzene and toluene in the so...
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Catherine Armbruster @catarmbruster.bsky.social · 26/03/2026
Congrats to Anish Pyne for winning the People’s Choice Award in tonight’s 3 Minute Thesis competition @cmu.edu 🥳🥳🥳 @cmuscience.bsky.social
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Reposted by Catherine Armbruster
Zamin Iqbal @zaminiqbal.bsky.social · 20/03/2026
Madness. A bacterium with a 10kb genome, lost replication initiation, translation.., relies on symbiotic host. www.nature.com/articles/s41...
nature.com
Convergent extreme reductive evolution in ancient planthopper symbioses - Nature Communications
Symbiotic bacteria can have exceedingly small genomes. This study finds that ancient bacterial symbionts of planthoppers have repeatedly evolved the smallest known genomes, losing most biosynthetic fu...
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Reposted by Catherine Armbruster
Nichole Broderick, PhD @nabroderick.bsky.social · 20/03/2026
Excited to announce our new journal from @isme-microbes.bsky.social ISME Host Microbe is live and now accepting submissions. Look forward to receiving your papers! #Microsky 🧫 🦠
Image of the cover of the 1st volume of ISME Host Microbe a new official journal of the International Society for Microbial Ecology. Cover images shows a plant stomata with bacteria around and entering.
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George O'Toole (he/him/his) @geiselbiofilm.bsky.social · 20/03/2026
New in JB: Mike Cashel is known internationally for his work on "magic spot", or (p)ppGpp, that serves as a key regulator of bacteria physiology. Hinman & Gottesman remember Dr. Cashel. journals.asm.org/doi/10.1128/... @asm.org #JBacteriol
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Catherine Armbruster @catarmbruster.bsky.social · 19/03/2026
My lab went outside! Check out this article (and video!) about a new project in my lab @cmuscience.bsky.social www.cmu.edu/mcs/news-eve...
cmu.edu
Hidden Helpers: Pittsburgh’s Industrial Past Might Hold the Key to a Cleaner Future
Pittsburgh has reinvented itself from a steel powerhouse to a hub for health care and education. But the city’s industrial past left a hidden legacy: toxic compounds like benzene and toluene in the so...
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Catherine Armbruster @catarmbruster.bsky.social · 05/03/2026
👏👏👏
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Catherine Armbruster @catarmbruster.bsky.social · 04/03/2026
Congratulations, @animrprfct.bsky.social! Best of luck and looking forward to watching you present in the finals for 3MT! @cmuscience.bsky.social
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Michael Brockhurst @brockhurstlab.bsky.social · 20/02/2026
How does treatment induced antibiotic resistance happen in real-world infections? We analysed 25k Pseudomonas isolates from 180 patients in a clinical trial to find out! TLDR: The ecological and evolutionary paths are surprisingly diverse & complex even in patients receiving identical treatment…
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Reposted by Catherine Armbruster
Vivek Mutalik @vivekmutalik.bsky.social · 12/02/2026
#microsky
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Ákos T Kovács @evolvedbiofilm.bsky.social · 07/02/2026
Starvation-independent alarmone production inhibits translation through GTP depletion - bioRxiv from @heatherfeaga.bsky.social #ppGpp #Bsubtilis
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Catherine Armbruster @catarmbruster.bsky.social · 25/01/2026
We call it Greenfield to confuse the Vikings. #pittsburgh
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Catherine Armbruster @catarmbruster.bsky.social · 20/01/2026
Congrats to Erin and Betsy for passing their qualifying exams last week!!!! Officially 3 PhD candidates in the lab @cmuscience.bsky.social now! 😎
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