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Sean Czerwinski

@sczerwinski.bsky.social
548 followers 1K following 35 posts

Ph.D. Candidate with @jamesgurney.bsky.social - Phage researcher that is open to swapping modules on occasion. he/him

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Reposted by Sean Czerwinski
James Gurney @jamesgurney.bsky.social · 28/08/2026
My R35 MIRA grant is officially funded. The Gurney Lab lives for another 5 years! This will allow us to push our awesome work on scRNAseq during phage infection even further and develop a better understanding of how phage sociality and gene essentiality is impacted by the environment and host.
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Sean Czerwinski @sczerwinski.bsky.social · 08/08/2026
#SocialViruses in Vancouver! I’m honored to have been a part of this incredible group of sociovirologists. Thank you @asherleeks.bsky.social and @sociovirology.bsky.social for having me, and everyone else who helped make for such a fascinating reassorting and recombining of ideas! #phagesky #virosky
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Amy Zamora @amycrobes.bsky.social · 25/06/2026
We're excited to share our work on how prophages influence the evolution of resistance against DNA-damaging antibiotics! This has been a fun project with @sianowen.bsky.social, @baym.lol, @theshreyaspai.bsky.social, @kepatitis-c.bsky.social, & @fernpizza.bsky.social biorxiv.org/content/10.6... 1/
biorxiv.org
SOS-mediated prophage induction constrains resistance evolution to DNA-damaging antibiotics
Most naturally occurring bacteria are lysogens, encoding one or more temperate phages (prophages) integrated into their genome. As prophages are induced by the bacterial SOS response, DNA-damaging ant...
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Stephen Turner @stephenturner.us · 18/11/2025
gggenomes: A Grammar of Graphics for Comparative Genomics thackl.github.io/gggenomes/ #Rstats
thackl.github.io
A Grammar of Graphics for Comparative Genomics
An extension of ggplot2 for creating complex genomic maps. It builds on the power of ggplot2 and tidyverse adding new ggplot2-style geoms & positions and dplyr-style verbs to manipulate the…
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Sean Czerwinski @sczerwinski.bsky.social · 11/11/2025
I made a phage… I think it’s in LB
Long contractile tailed bacteriophage in a yellow-gold environment.
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Reposted by Sean Czerwinski
Riding With Robots @ridingrobots.bsky.social · 10/11/2025
Started / going Here's a view of Jupiter from NASA's Juno spacecraft, now in orbit there. science.nasa.gov/mission/juno Image processed from raw data by @kevinmgill.bsky.social
Jupiter against the blackness of space. The planet is wrapped in its characteristic horizontal bands of colorful clouds. Photo: NASA/JPL-Caltech/SwRI/MSSS/Kevin M. Gill © cc by
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Mike Blazanin @mikeblazanin.bsky.social · 08/09/2025
Happy to see this paper finally out in @pnas.org! #phage #microbiology #MicroSky #VirEvol 🦠 🧫 🔬 Gift link: www.pnas.org/eprint/YYDZ9...
pnas.org
Quantifying phage infectivity from characteristics of bacterial population dynamics | PNAS
A frequent goal of phage biology is to quantify how well a phage kills a population of host bacteria. Unfortunately, traditional methods to quantif...
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Ellie Jameson @elliejameson.bsky.social · 22/10/2025
Happy World Phage Day! Tiny viruses have mighty roles, shaping our environment and life on Earth. Phages maintain microbial community stability, impact primary production, nutrient cycle and pathogen virulence. We can also use phages in phage therapy to combat bacterial infections. #PhageSky
Black and white ink illustration of a myovirus in a steampunk style
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Ellinor Alseth @ellinoralseth.bsky.social · 08/08/2025
Feels surreal to say but: I'm hiring! If you are or know anyone interested in looking at the evolution of phage resistance using A. baumannii and natural transformation, then this might be for you www.jobbnorge.no/en/available...
jobbnorge.no
Research position in Microbial Pharmacology and Population Biology (282139) | UiT The Arctic University of Norway
Job title: Research position in Microbial Pharmacology and Population Biology (282139), Employer: UiT The Arctic University of Norway, Deadline: Wednesday, August 27, 2025
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Emmanuele Severi @emmseveri.bsky.social · 20/09/2025
www.nature.com/articles/s41... #phagesky #phage
nature.com
Phages with a broad host range are common across ecosystems - Nature Microbiology
Proximity-ligation-based sequencing from 111 samples and 5 environments reveals that a substantial proportion of phages infect multiple species.
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Sean Czerwinski @sczerwinski.bsky.social · 09/08/2025
Phold is a fantastic tool and my go to for detailed annotation and visualization of phage genomes. Congrats!
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Reposted by Sean Czerwinski
George Bouras @gbouras13.bsky.social · 08/08/2025
Stoked to finally have a preprint out for Phold, our tool that uses protein structural information to enhance phage genome annotation #phagesky 1/n www.biorxiv.org/content/10.1...
biorxiv.org
Protein Structure Informed Bacteriophage Genome Annotation with Phold
Bacteriophage (phage) genome annotation is essential for understanding their functional potential and suitability for use as therapeutic agents. Here we introduce Phold, an annotation framework utilis...
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Sarah McAnulty, Ph.D. @sarahmackattack.bsky.social · 07/08/2025
Scientists! @skypeascientist.bsky.social matches scientists with classrooms, libraries, & more for virtual Q&As! It's easy and fun! We are looking for 750 more volunteers by 8/15 If you're down to chat with 1-5 classrooms this semester, sign up here www.skypeascientist.com/sign-up.html
a canva graphic that says "How it works Step 1:  Go to SkypeAScientist.com
Step 2: Click “Sign Up” then “Scientist
              Sign Up Form”
Step 3: Tell us about yourself
Step 4: Get matched with a classroom
Step 5: Connect with the teacher
Step 6: Make a kid’s day 
isn't that great?
@SkypeAScientist"
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Reposted by Sean Czerwinski
James Gurney @jamesgurney.bsky.social · 12/07/2025
New lab logo
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Sean Czerwinski @sczerwinski.bsky.social · 23/06/2025
Incredible conversations at #ASMicrobe2025! Thank you to everyone who stopped by to talk phages, evolution, and the potential of phage steering in complex infections! @asm.org #PhageSky #PhageSteering
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Trends in Microbiology @cp-trendsmicrobiol.bsky.social · 18/06/2025
Phage tRNAs: decoding the enigma
dlvr.it
Phage tRNAs: decoding the enigma
The presence of tRNAs in bacteriophage genomes has intrigued scientists since their discovery in the early 1960s, as phages were believed to rely on the host tRNAs for their translation. Over the years, a multitude of hypotheses have been explored, providing evidence that phages with different lifestyles utilize tRNAs in distinct ways. In recent years, several studies have provided evidence that phage tRNAs play a crucial role in evading phage defense systems. In this review we summarize the current state of the field of phage tRNAs, highlighting their diverse roles in phage infection. We also discuss the host response to phage tRNAs and the application of this knowledge to improve phage-based therapeutics to combat bacterial infections.
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Dino Sbardellati @phagebeelicious.bsky.social · 16/06/2025
Going to ASM Microbe 2025? Check out the in-depth symposium "Phage Ecology: From Prophage Decision Making to Ecosystem Modulation" hosted by Dr. Hernandez (@cathyhernandez.bsky.social) and I! We have some really cool talks lined up. Hope to see you there! 🧪🦠🔬 #Phagesky #Microsky
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Jason Nomburg @jnoms.bsky.social · 12/06/2025
Hello everyone! I am pleased to share information on the first ever Computational Structural Virology Symposium, conducted August 4th on zoom and highlighting work in this emerging field. You can register for this event here: forms.gle/CNiqskMwQEuV.... Please re-post!
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Sean Czerwinski @sczerwinski.bsky.social · 10/06/2025
I’d love to chat more about this work and the potential of phage steering in complex, drug-resistant infections. Come find me at my poster at ASM Microbe 2025 - Sunday, June 22nd!
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Sean Czerwinski @sczerwinski.bsky.social · 10/06/2025
We found SNPs in pilR and pilZ, key regulators of T4P biogenesis. One line had a SNP in pqsR, a transcriptional regulator of quorum sensing in PA, because is it ever not quorum sensing? These mutations conferred resistance to the phage and attenuated T4P function!
Mutations in key regulatory factors of T4P biogenesis confer phage resistance. (A) PilR serves as the response regulator of pilA transcription. The sensor kinase, PilS, phosphorylates PilR, activating it, which, in turn, activates transcription of pilA, which encodes for the major pilin subunit, PilA. (B) PilZ regulates T4P biogenesis. By binding to the extension ATPase, PilB activates shaft polymerization. PilZ and FimX are necessary for PilB activation. (C) Without PilZ binding, PilB remains inactive, and energy is not generated for shaft assembly. (D) Defective PilR does not activate transcription of pilA, no PilA subunits are synthesized, and thus, the shaft is not assembled.
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Sean Czerwinski @sczerwinski.bsky.social · 10/06/2025
Curiously, lines evolved in the presence of S. aureus showed greater SNP diversity conferring resistance to the phage. See the bold SNPs...
Chromosomal single-nucleotide polymorphisms (SNPs) defined for all co-evolution condition replicates and the ancestral PAO1. SNPs were determined using breseq (version 0.31). SNPs of two variations in 5 out of 5 (5/5) +Luz19 co-evo replicates and 3/5 +SA+Luz19 co-evo replicates. In all but one of these replicate sequences, the SNP in pilR is C192Y (TGC → TAC). Replicate B of the +Luz19 condition had a different SNP in pilR, P189Q (CCG → CAG). Of the replicates in the two conditions that were subject to co-evolution with Luz19, two lacked an SNP in pilR, both in the +SA+Luz19 condition. Replicate B instead had a 197 bp deletion in pilZ. Replicate A of +SA+Luz19 was the only replicate co-evolved alongside Luz19 that sequencing did not reveal a pil gene mutation; instead, a PQS system mutation was identified in pqsR.
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Sean Czerwinski @sczerwinski.bsky.social · 10/06/2025
It's out! We used the T4P-dependent phage Luz19 to select against the type IV pilus virulence factor in P. aeruginosa, despite the presence of competing S. aureus.
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Sean Czerwinski @sczerwinski.bsky.social · 10/05/2025
Thanks very much!
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Sean Czerwinski @sczerwinski.bsky.social · 08/05/2025
Really exciting preprint, congrats! I’ve been working on identifying novel phages from P. aeruginosa CF isolates, but suspect some (or many) may be missed by my pipeline. I’d love to try Phager. I saw phager.py mentioned and assume the SI is pending, but any chance early access might be possible?
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Schmidt Ocean Institute @schmidtocean.bsky.social · 15/04/2025
🦑 This baby is COLOSSAL! 🦑 First confirmed live observation of the colossal squid, Mesonychoteuthis hamiltoni, in its natural habitat. Filmed at about 600m near the South Sandwich Islands during the #SouthSandwichIslands expedition. youtu.be/lzPoG9H8Hlo
youtu.be
Colossal Squid, 1st Live Observation | Searching for New Species in the South Sandwich Islands
YouTube video by Schmidt Ocean
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Landru79 @landru79.bsky.social · 12/04/2025
#NASA's #Chandra X-ray Observatory Vela Pulsar chandra.harvard.edu/photo/2013/v... NASA/CXC/Univ of Toronto/M.Durant/j. Roger
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Ákos T Kovács @evolvedbiofilm.bsky.social · 02/04/2025
Susan today explains contractile injection systems of Streptomyces - see their cool paper in @naturemicrobiol.bsky.social www.nature.com/articles/s41... #KNVM2025
nature.com
Cytoplasmic contractile injection systems mediate cell death in Streptomyces - Nature Microbiology
Characterization of a contractile injection system (CIS) in the Gram-positive multicellular model organism Streptomyces coelicolor finds that CIS mediate cell death in response to stress that impacts ...
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Reposted by Sean Czerwinski
Alexander Harms @aharms485.bsky.social · 02/04/2025
Fantastic new preprint of Vaughn Cooper's lab @vscooper.micropopbio.org - filamentous phages can get cancer and it's contagious. 🔥👇🏼 www.biorxiv.org/content/10.1...
biorxiv.org
Filamentous cheater phages drive bacterial and phage populations to lower fitness
Many bacteria carry phage genome(s) in their chromosome (i.e., prophage), and this intertwines the fitness of the bacterium and the phage. Most Pseudomonas aeruginosa strains carry filamentous phages ...
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Daria Van Tyne @dariavantyne.bsky.social · 21/03/2025
Excited to share our latest, out today in @naturemicrobiol.bsky.social Bacteriocin production facilitates nosocomial emergence of vancomycin-resistant Enterococcus faecium www.nature.com/articles/s41... @idpittstop.bsky.social
nature.com
Bacteriocin production facilitates nosocomial emergence of vancomycin-resistant Enterococcus faecium - Nature Microbiology
Genomic and functional analyses of healthcare-associated vancomycin-resistant Enterococcus faecium reveal that bacteriocin T8 is enriched in emergent lineages and provides a competitive advantage in v...
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c0nc0rdance @c0nc0rdance.bsky.social · 23/02/2025
Beautiful video of inter-cellular signaling in a swarming response that I pulled from the other place, produced by @strickland-evelyn.bsky.social in collaboration with D. Irimia lab. The dye detects calcium flux that indicates a signal being received by each cell: you're seeing the 'alarm' go out.
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Evelyn Strickland @strickland-evelyn.bsky.social · 06/11/2024
Just because its fun~ This is one of my favorite videos I've taken in my PhD! Here is 60x imaging of neutrophils swarming to attack yeast targets in blue :)
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Jyot Antani @antanij.bsky.social · 19/12/2024
We developed a microscopy-based technique🔬 to measure attachment of viruses #phages to host cells. 🦠 The paper was posted online today: www.pnas.org/doi/10.1073/... #phagesky #microsky
Bright green spots are phages (viruses), bacteria are the faint rods in light blue.
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Paul M Smith @paulmsmithphoto.bsky.social · 30/12/2024
I had images in my head of what I wanted to capture on my recent adventure to the southern USA. I wanted storms and sprites with Bayou foregrounds. Man, it is a tough place to chase- dark skies are hard to find as are accessible, treeless areas to get a view.
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Mike Blazanin @mikeblazanin.bsky.social · 17/12/2024
Happy to see this out now in @asn-amnat.bsky.social! We combined experimental evolution and mathematical modeling to ask: can bacteria evolve to swim away from their viral parasites? 1/n #evosky 🦠 #phage 🧪 (gift link:) www.journals.uchicago.edu/eprint/TETM9...
journals.uchicago.edu
University of Chicago Press Journals: Cookie absent
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Meghie Rodrigues @meghier.bsky.social · 26/11/2024
Thank you so much to whoever put this very comprehensive list of #science Bsky starter packs together. This is just amazing: docs.google.com/document/d/1...
docs.google.com
Starter packs
BIOLOGY General Science community https://go.bsky.app/HVYAMEA Research Institutions in Life Sciences https://go.bsky.app/LxXpcvJ LGBTQIA+ in STEM https://go.bsky.app/BFc4wgf LGBTQIA+ in STEM 2 h...
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Sean Czerwinski @sczerwinski.bsky.social · 26/11/2024
Is anyone knowledgeable, or knows someone that is, about deciduousness in conifers? I’m curious what were the selective pressure(s) and evolutionary pathways that result in it. I’ve seen a few Tamarack larch (Larix laricina) here in Alaska, they’re amazing!
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Sean Czerwinski @sczerwinski.bsky.social · 26/11/2024
It’s my first time in Alaska and I’m enthralled. The temperate rainforest and rapid ecosystem shift as you move from coastline to jagged peaks is fascinating
Frozen marshValley with steep mountains in the background and a frozen river running through the foreground Plants covered in ice, carried in by the dense mistMiddle of the day, around 12:30 PM, the sun barely reaches above the peaks
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Dino Sbardellati @phagebeelicious.bsky.social · 22/11/2024
Working on phage research? Dr. Catherine Hernandez and I are co-convening the "Phage Ecology: From Prophage Decision Making to Ecosystem Modulation" in-depth symposium at ASM Microbe 2025 and we want YOU to be part of it! Abstract submission is now open! More info below 🧪🦠🔬 #Phagesky #Microsky
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Sean Czerwinski @sczerwinski.bsky.social · 21/11/2024
Thanks for the shout, @jamesgurney.bsky.social! For those interested and/or new to bsky, check out our recent preprint: bsky.app/profile/scze...
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Sean Czerwinski @sczerwinski.bsky.social · 19/11/2024
@peachypotato.bsky.social
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Jan @yawnxyz.bsky.social · 18/11/2024
I'm helping @jamesgurney.bsky.social restart @phagepapers.bsky.social I just wrote some code that once a day: 1. Searches some Pubmed keywords and adds the results to Google sheets 2. Posts a random link from the Sheets to Bluesky Would anyone like a writeup? Or expand beyond just phage papers?
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Meaghan Castledine @mcastd.bsky.social · 15/11/2024
Hello new phage phollowers! I am shamelessly self-promoting mine and Angus Buckling's relatively new review "Critically evaluating the relative importance of phage in shaping microbial community composition" www.cell.com/trends/micro...
cell.com
Critically evaluating the relative importance of phage in shaping microbial community composition
The ubiquity of bacteriophages (phages) and the major evolutionary and ecological impacts they can have on their microbial hosts has resulted in phages often cited as key drivers shaping microbial com...
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CosmicRami 🏳️‍🌈🏳️‍⚧️ @rami.spaceaustralia.com · 18/11/2024
Fun pre-print time! 🚨 PSR J0337+1715 is a bit of a unique system, it's got a pulsar and 2 white dwarfs orbiting it (triple). Excellent GR lab. This paper analyses an extended dataset and proposes models to explain low-frequency timing noise, incl. modelling the possibility of a pulsar planet! 🔭📡
arxiv.org
Explanation of the exceptionally strong timing noise of PSR J0337+1715 by a circum-ternary planet and consequences for gravity tests
Context: Timing of pulsar PSR J0337+1715 provides a unique opportunity to test the strong equivalence principle (SEP) with a strongly self-gravitating object. This is due to its unique situation in a ...
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 18/11/2024
Re-sharing our last paper on the effect of restriction-modification systems on conjugative plasmids: doi.org/10.1093/nar/... #MicroSky
doi.org
Various plasmid strategies limit the effect of bacterial restriction–modification systems against conjugation
Abstract. In bacteria, genes conferring antibiotic resistance are mostly carried on conjugative plasmids, mobile genetic elements that spread horizontally
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Sean Czerwinski @sczerwinski.bsky.social · 17/11/2024
Spending time with family and found the remaining exoskeleton of a dead wheel bug in the garage. They don’t appreciate my fascination with the wheel and piercing mouth part, but maybe someone on here will.
Exoskeleton of a dead wheel bug
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Joshua Weitz @joshuasweitz.bsky.social · 16/11/2024
Critical to pay attention to this line "Bhattacharya coauthored an April 2020 study that drew a different conclusion: The coronavirus was far more widespread than previously assumed, suggesting its risks were overstated." www.washingtonpost.com/health/2024/...
washingtonpost.com
Jay Bhattacharya, an NIH critic, emerges as a top candidate to lead the agency
The Stanford physician was excoriated by NIH’s director in 2020 for his “fringe” ideas on covid. Four years later, he’s poised for power in Trump’s Washington.
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Sean Czerwinski @sczerwinski.bsky.social · 15/11/2024
Can’t wait to get your feedback next time!
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Sean Czerwinski @sczerwinski.bsky.social · 15/11/2024
Thank you to @peachypotato.bsky.social for putting this together!
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Sean Czerwinski @sczerwinski.bsky.social · 15/11/2024
Thanks Josh! I’m excited for your talk!
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