Big week: welcomed a new baby boy Harris Lopatkin, AND our PlasAnn paper is finally out: academic.oup.com/nar/article/... (obviously the first more important than the second 🥰). Currently on leave but if anyone has the need to annotate large plasmids, go check it out!

Interested in eco-evolutionary feedbacks? Microbial experimental evolution? Pleiotropy? Filamentous phages?? Check out our latest preprint, now up on BioRxiv! biorxiv.org/content/10.6... For a quick summary, peep the thread below...🧵 (1/10)

Congrats to @noahhoupt.bsky.social for this massive effort (1000 generation!) evolution experiment demonstrating the importance of organism-derived environmental modifications in shaping adaptive evolution. A great example of how bacterial evolution only makes sense in the light of phage :)

It’s officially happening folks! The Microbial Population Biology Gordon Research Conference is back in Andover, New Hampshire starting June 27th of 2027! See you there!! @wcratcliff.bsky.social @ksbakes.bsky.social @surtlab.bsky.social #microsky #mevosky

Summer REU in biofilms! Pls share. www.binghamton.edu/centers/biof...

New preprint from my lab (with Arya Kaul, @fernpizza.bsky.social, and @brinda.eu), in which we explore new genes hitchhiking on the beneficial deletion that fused them together, and find them in the LTEE, M. Tb/bovis, and across the bacterial tree of life

💻 github.com/baymlab/deletion-born-fusion-manuscript 🔧 github.com/aryakaul/prefixsuffix-kmer Many thanks to co-authors @fernpizza.bsky.social , @brinda.eu & @baym.lol + GenScale/Baym lab! Funded by NIH, Packard, Pew, Sloan & a Chateaubriand Fellowship!

Arya (my best friend) does not have social media, he asked me to tweet this for him. But if you want to chat about science (or offer him a job) you can contact him at arya.casa/contact. He’ll (probably) be defending soon!

🎉 New year, NEW PREPRINT! Bacteria exhibit astonishing genetic diversity, but where do new genes come from? My best friend Arya Kaul (/labmate in the @baym lab) investigates how advantageous deletions can spawn new genes - "deletion-born fusions." 🧵:

Provirus induction diversifies adaptive variation in Pseudomonas aeruginosa lysogen populations https://www.biorxiv.org/content/10.64898/2026.01.04.697566v1

Happy new year! The second big project of my PhD in Rachel Whitaker's lab is now up! 🎉 We look at how provirus infection affects the evolution of the bacterial chromosome with different types of viral induction – with CRISPRs or antibiotics. Take a peek 🦠 www.biorxiv.org/content/10.6...

Happy to see @joelrc.bsky.social's paper identifying cellular heterogeneity in basal OASL expression as a major determinant of interferon induction during influenza virus infection out in its final form: www.pnas.org/doi/10.1073/... Happy new year, hope everyone's 2026 is better than 2025!

Analyses of Genome-Wide Recombination in Sulfolobus islandicus https://www.biorxiv.org/content/10.64898/2025.12.16.694729v1

Wow that sounds like a cool paper! Everyone should read it! (it's mine it's my paper 😁) thrilled to announce that it's on BioRxiv now!! Anyone who is interested in the uncultivated majority, cool microbes, and eco-evolutionary dynamics should give it a read!!

Is there anyone out there in the wide wide Pseudomonas world who uses pseudomonas.com and.... likes it? or at least has a normal experience with it? It routinely takes a long time to load and there's often Cloudflare errors.

Beautiful work from Jay Winans in the Nadell Lab @dartmouthartsci.bsky.social showing IncF plasmid pED208 spreading like wildfire through E. coli biofilms www.cell.com/current-biol...

Check out @lizthayer.bsky.social's new preprint exploring factors that influence cell-to-cell heterogeneity in interferon (IFN) induction potential!

If you're interested in using pangenome graphs for comparative genomics, check out my webinar, part of EMBL-EBI's "Concepts, methods, and resources in pangenomics" series, available on-demand: www.ebi.ac.uk/training/eve...

Phage and phage defense friends! What conferences are you attending this upcoming year?

So happy to share this! Bacteriocins were first discovered over 100 years ago, but what do they actually do? We look at >1000 bacteriocin plasmids and find links to virulence and antimicrobial resistance, and frequent bacteriocin sharing in Enterobacteriaceae. www.nature.com/articles/s41...

My labmate @kevinricks.bsky.social and I decided to complete a side project during the last year of our doctorate programs, and I'm happy to say that it's finally been published in New Phytologist !! doi.org/10.1111/nph....

Carbapenem-resistance oprD mutations reshape Pseudomonas aeruginosa host-pathogen interactions during infection https://www.biorxiv.org/content/10.1101/2025.10.24.684370v1

#microsky #mevosky The UNC Chapel Hill Biology Department is hiring 2 Teaching Assistant/Associate Professors with expertise from any area of biology. Individuals with expertise in microbiology are particularly encouraged to apply. Read more and apply at unc.peopleadmin.com/postings/307...

Microbiology Postdoctoral Position (Please re-post) A funded postdoctoral position in Chicago will open in 2026 to study aspects of Neisseria gonorrhoeae pathogenesis, antigenic variation, genetics, or physiology. If interested, please get in touch with Hank Seifert [email protected]

Very happy to share that I will be starting as an Assistant Professor in the department of Biological Sciences at the University of South Carolina in January! My group will be working on environmental phage ecology and evolution, and I am recruiting for the upcoming year (more info below).

New preprint! Ever wondered why only a fraction of genomes encode CRISPR immunity? 🧬 🦠 Turns out CRISPR is rarely beneficial against virulent phages, being most beneficial against those for which resistance mutations are rare! An epic effort by Rosanna Wright www.biorxiv.org/content/10.1...

www.cell.com/trends/ecolo... New entry into the Disability in Ecology and Evolution series in TREE featuring me :)

I have never been jealous of a Nobel prize winner before….

Published in Current Biology! P. aeruginosa can use its filamentous phage to inhibit competitors but high phage production is susceptible to cheater miniphage invasion. Subsequent phage tragedy of the commons can lower bacteria and phage fitness. Link: authors.elsevier.com/c/1lt5I3QW8S...

DYK most P. aeruginosa carry filamentous phage(s) that don't need to kill the cell to reproduce? We 👉🏻@nanamikubota.bsky.social show that these Pf phages can go ROGUE. "Filamentous cheater phages drive bacterial and phage populations to lower fitness" 🔗 authors.elsevier.com/c/1lt5I3QW8S...

Now published in @natcomms.nature.com 🎉 www.nature.com/articles/s41... With Gillian Rodger, @nstoesser.bsky.social, @samlipworth.bsky.social, @stat-sarah.bsky.social, and many others!

Thrilled to share our paper that just came out in PNAS! We asked a deceptively simple question: What happens when S. aureus adapts to vancomycin, a critical first-line antibiotic? 1/5

Delighted to see our paper studying the evolution of plasmids over the last 100 years, now out! Years of work by Adrian Cazares, also Nick Thomson @sangerinstitute.bsky.social - this version much improved over the preprint. Final version should be open access, apols. Thread 1/n

✨Célia Souque just showcased the outcomes of the 12th Microbial Bioinformatics Hackathon at IMMEM XIV. She brilliantly presented the first sneak-peek of PORT – Plasmid Outbreak Reporting Tool! 🧬 Looking forward to continuing this collaboration with PORT! #IMMEM #Hackathon #Plasmids #ESGEM #ESGMAP

Does anyone know a gene in E. coli that duplicated "fairly recently", as to compare and contrast it's sequence divergence with that found in mobile elements? #sciencesky #microsky

Willing to join us @pasteur.fr for a PhD for a project on how interactions between mobile genetic elements shape bacterial adaptation? Subject to be tailored to candidates with keen interest in evolution, genomics, computational biology, microbiology. Check www.pasteur.fr/en/education...

A One Health study of Klebsiella pneumoniae species complex plasmids shows a highly diverse and ecologically adaptable plasmidome https://www.biorxiv.org/content/10.1101/2025.09.14.676155v1

So...what would happen to the global TB epidemic if we hypothetically "eliminated" undernutrition? In this preprint, we combined estimates from our new review (doi.org/10.1093/ije/...) with population-specific BMI distributions to find out...(doi.org/10.1101/2025...)

This past year, my dad was diagnosed with Parkinson's disease. On October 5th, our family will walk together as Team Kosmo at Moving Day Chicago to celebrate his strength and support everyone living with Parkinson's.

hey bluesky 👋 visa hurdles mean I’m looking for opportunities outside the US. I’m a computational biologist (bacterial + phage genomics, postdoc in Koonin’s group @ NIH). I am interested in teaming up on funding apps. reach out if this resonates!

Happy to see this paper finally out in @pnas.org! #phage #microbiology #MicroSky #VirEvol 🦠 🧫 🔬 Gift link: www.pnas.org/eprint/YYDZ9...

For anyone who has used pling for comparing plasmids using rearrangement distances ("how many structural events apart are these plasmids"), here's how to tweak parameters, and integrate it with typing info, and the host phylogeny www.biorxiv.org/content/10.1... github.com/iqbal-lab-or...

What was antibiotic resistance like before we ever used antibiotics? How did we change what antibiotic resistance genes looked like over 100 years? Our paper looking at resistance genes from a century of NCTC historical isolates now out in mGen: www.microbiologyresearch.org/content/jour...

Plasmids can be lost from a bacterial community even under positive environmental selection: doi.org/10.1101/2025...

An inspiring read! academic.oup.com/genetics/adv... A beautiful historical perspective on Ester Lederberg's legacy from @ccwendling.bsky.social & @zacharybailey.bsky.social

New preprint reveals bacteria can't just collect all resistance genes like Pokemon cards. We found mutually exclusive evolutionary pathways to multidrug resistance in E. coli & P. aeruginosa - some resistance mechanisms actively prevent others from coexisting www.biorxiv.org/content/10.1...

Our EEB department at the University of Illinois at Urbana-Champaign is hiring an assistant professor in evo-devo. See go.illinois.edu/EEBAsstProf for details. Please share!

Check out our new paper led by brilliant @jhuisman.bsky.social about how microbial communities cope with stress due to increasing salinity in their environment. We have all your favorites: isolate phenotyping, pairwise competitions, community propagations, and theory. #microsky #mevosky #ecosky

The Weisberg Lab at Oregon State University is recruiting a postdoctoral scholar in molecular microbiology to study mobile genetic element host range and transmission in microbial communities. Please see the full job description here: files-dev.cqls.oregonstate.edu/Weisberg_Lab...