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Tatiana Dimitriu

@tatianadimitriu.bsky.social
1.8K followers 612 following 132 posts

@royalsociety University Research Fellow in St Andrews. Bacterial evolution, mobile genetic elements & defence systems, antibiotic resistance, social interactions. 🇫🇷 with some 🇷🇴 and 🇺🇦 roots. She/her

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Reposted by Tatiana Dimitriu
Tung Le @tunglejic.bsky.social · 08/10/2026
🚨PhD opportunity alert!!! Come work with us on this new cool NERC DTP PhD project Investigate How Bacterial Hosts Control Domesticated Viral Machines to Drive Horizontal Gene Transfer in Marine Environments. Retweet = nice. Thank you!!! aries-dtp.ac.uk/studentships...
aries-dtp.ac.uk
Investigate How Bacterial Hosts Control Domesticated Viral Machines to Drive Horizontal Gene Transfer in Marine Environments? | Aries
Professor Tung Le, John Innes Centre – contact me Professor Jonathan Todd, Quadram Institute & UEA Dr Ngat Tran, John Innes Centre Horizontal gene transfer (HGT) is a major driver of bacterial…
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Reposted by Tatiana Dimitriu
johnedwinmason @johnedwinmason.bsky.social · 07/10/2026
Here's a good overview of the student protests in France, which began in Paris suburbs, in working-class schools attended by many black & brown students, & have spread nationwide. The government has tried to end the protests through violent repression. It hasn't worked. f24.my/CCfu
f24.my
'We're fed up': Paris students rise up in a movement that shows no sign of slowing
Hundreds of thousands of students and their supporters took part in nationwide protests across France on Tuesday after weeks of student barricades protesting school conditions.
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 08/10/2026
PhD opportunity! Join us in St Andrews to study the consequences of defence against conjugative plasmids (preprint coming soon on this!). Funded by EASTBIO, co-supervised by @mfwhite2.bsky.social. Please share & pass on to anyone interested! 🦠🧫 Deadline 16th November www.findaphd.com/phds/project...
findaphd.com
Eastbio: Mechanism and consequences of lethal zygosis in bacteria restricting AMR plasmids. at University of St Andrews on FindAPhD.com
PhD Project - Eastbio: Mechanism and consequences of lethal zygosis in bacteria restricting AMR plasmids. at University of St Andrews, listed on FindAPhD.com
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Thomas Ipoutcha @tomipou.bsky.social · 16/09/2026
Finally out! 🎉 After 3 years of postdoc in London, here is my main work, now published in Nature Comm. (and as co-corresponding author!) Using a combination of bioinformatic and experimental approaches, we propose a model of plasmid evolution in Staphylococcus. www.nature.com/articles/s41... ⬇️ 1/4
nature.com
Mobile genetic elements drive a plasmid fusion and deletion lifecycle shaping evolution and antimicrobial resistance - Nature Communications
Plasmids drive bacterial adaptation, but how their diversity arises has remained unclear. Here, they show that in Staphylococcus aureus, mobile genetic elements repeatedly fuse and delete plasmids, re...
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Vivek Mutalik @vivekmutalik.bsky.social · 19/09/2026
Some of the smallest 😎 viruses on Earth are all around us. Three or four genes 😍 each, in nearly every environment. We keep finding thousands by sequencing, yet don't know who they infect, can't easily isolate them, or even how the few we have infect a cell. Our new preprint takes this on 🧵👇
Schematics of how single strand RNA and DNA phages infect bacteria with F-pilus
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Ellinor Alseth @ellinoralseth.bsky.social · 11/09/2026
It's finally published! What a journey @brownlab.bsky.social and I have been on with this one (ask me about it over a pint 🍻). Super excited to be able to say that it's finally out in Trends (author gift link to follow)! 🦠🧫 #phagesky
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Will Matlock @wtmatlock.bsky.social · 09/09/2026
Does an AMR gene on a plasmid diversify differently to an AMR gene on a chromosome? We are looking for a PhD student to work on this question in Bath!
gw4biomed.ac.uk
Turning up the volume: plasmid copy number and gene duplications as drivers of antimicrobial resistance evolution - GW4 BioMed MRC DTP
Project Code IIAR27Ba Matlock Project Type Wet lab Research Theme Infection, Immunity, and Antimicrobial Resistance Project Summary Download Summary Plasmids are important drivers of antimicrobial res...
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 05/09/2026
oh no www.youtube.com/watch?v=yHCk...
youtube.com
Tchiki Ciorba
YouTube video by Tony Gatlif - Topic
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 05/09/2026
On my way to ISPB2026, starting with my favorite part of the journey
View over the Firth of Forth from the train, red railing, blue sky, blue water and new white bridge
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Rémi Tuffet @remituffet.bsky.social · 31/08/2026
Our new paper is out in @PLOS Biology! 🎉 “Ecological theory sheds light on plasmid diversity and dynamics” 🔗 doi.org/10.1371/jour... More on the main findings in the next posts 👇
doi.org
Ecological theory sheds light on plasmid diversity and dynamics
Bacterial genomes are remarkably dynamic, shaped by horizontal transfer of plasmids that follow evolutionary trajectories of their own. This study uses eco-evolutionary perspectives to reveal how the ...
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Noah Houpt @noahhoupt.bsky.social · 25/08/2026
Thrilled to see this project officially published in ISMEJ! We showed that filamentous prophages frequently acquired repressor mutations causing hyperactivity which, in turn, drove the evolution of phage resistance with pleiotropic consequences. academic.oup.com/ismej/advanc...
academic.oup.com
Mutations in filamentous bacteriophages spark eco-evolutionary feedbacks in Pseudomonas aeruginosa
Abstract. Microbial populations strongly shape their environment, which can re-route adaptation toward organism-generated fitness optima. However, the cond
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Tobias Warnecke @tobiaswarnecke.bsky.social · 22/08/2026
Who needs chromatin anyway...? NOT THIS GUY! www.biorxiv.org/content/10.6... 1/n
biorxiv.org
Chromatin is dispensable for bacterial life
Inside cells, DNA is intimately associated with proteins, forming chromatin. The protein constituents of chromatin vary across the tree of life: histones are the principal building blocks of chromatin...
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 20/08/2026
New paper led by Liam Shaw, with Arancha Peñil Celis, @aresarroyom.bsky.social, @adalijuanluo.bsky.social & Fernando de la Cruz. academic.oup.com/nar/article/... This is very much Liam’s story, but I loved playing a small part in it 🧵
academic.oup.com
The leading region of many plasmids is adapted for translational efficiency
Abstract. To successfully transfer, conjugative plasmids must overcome a recipient cell’s defence mechanisms. The leading region of many plasmids—the first
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Isabel, booonyavirus wonk @isabelott.bsky.social · 19/08/2026
“Ultimately, our data suggest that this practice is not evidence-based and that, except in a specific subset of circumstances, Bunsen burners can be removed from classroom and laboratory practice without compromising research integrity.” 😳
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Zeynep Baharoglu @zeynepbaharoglu.bsky.social · 18/08/2026
academic.oup.com/nar/article/... 🦠
academic.oup.com
The leading region of many plasmids is adapted for translational efficiency
Abstract. To successfully transfer, conjugative plasmids must overcome a recipient cell’s defence mechanisms. The leading region of many plasmids—the first
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 07/08/2026
Cats seem very happy in Scotland. Hard to believe that they are now considered to be senior cats (at least by cat food merchants)!
My beautiful tuxedo cats. One elegantly sat on top of the boiler, with her tail neatly on her paws, the other sound asleep on a chair cuddling with the internet box.
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Prof Jenny Rohn @jennyrohn.bsky.social · 24/07/2026
“Resistance did not arise from mutation accumulation or strain displacement. Instead, it occurred because plasmid-borne resistance genes were transferred to the previously sensitive pathogens inside patients’ lungs”. Cool (sobering) study #AMR #MicroSky #IDSKy #CysticFibrosis
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Craig Kaplan @triggerloop.bsky.social · 22/07/2026
Some bacteria use the CRISPR/Cas systems as transcriptional repressors of other anti-phage systems, such that when CRISPR interfered with, gene expression of repressed anti-phage systems goes up www.nature.com/articles/s41...
nature.com
CRISPR–Cas regulates expression of embedded anti-phage defence systems - Nature
CRISPR–Cas systems transcriptionally tune diverse innate defences using CRISPR RNA-like guides to balance antiviral protection with fitness, and hyperactivate these defences when compromised, establis...
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Xavier Charpentier @labxc.bsky.social · 07/07/2026
#microsky New preprint from the lab! Widespread immune systems protect bacteria against conjugative plasmids www.biorxiv.org/content/10.6... Kudos to the extremely talented lead author Ludovic Poiré! Key contributions by @francoisrousset.bsky.social and also help from C. Lesterlin/TacC lab. 🧵⬇️
biorxiv.org
Widespread immune systems protect bacteria against conjugative plasmids
Conjugative plasmids are a class of mobile genetic elements capable of efficient transfer between bacterial cells. Although they can introduce beneficial traits such as antibiotic resistance to recipi...
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Peter Laurin @peterlaurin.bsky.social · 30/06/2026
Super excited to share new work with my advisor @nanditagarud.bsky.social! We re-examine the rapidity of adaptation in the human gut microbiome and begin to characterize the adaptive architecture of selective sweeps spreading across human guts. www.biorxiv.org/content/10... 1/n:
biorxiv.org
Complex adaptive architectures constrain the pace of adaptations sweeping across human gut microbiomes
Recent work has shown that commensal gut bacteria can evolve rapidly within hosts on short timescales of days to months, fueled by the enormous mutational input generated daily in the microbiome. Yet ...
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 19/06/2026
drama in one act this morning
a very unbothered cat rolling on the table, with a broken cup and coffee everywhere on the floor below
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bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 03/06/2026
Molecular pet or parasite? Exploring selection for vertical and horizontal plasmid transfer www.biorxiv.org/content/10.64898/20…
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Marta Lourenço @martalourenco21.bsky.social · 28/05/2026
🧵 New preprint out! We asked: what happens to gut bacteria when the intestine is under chronic inflammation (IBD)? Turns out, the host's inflammatory state reshapes how they evolve, and the results are pretty striking. A thread 👇
biorxiv.org
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Craig MacLean @craigmaclean.bsky.social · 03/06/2026
Excited to share this new paper from the lab: academic.oup.com/ismej/articl...! See thread below
academic.oup.com
Eco-evolutionary responses to plasmid-dependent phage constrain the spread of multidrug-resistance plasmids
Abstract. Phage therapy offers an alternative to antibiotics for treating multidrug-resistant infections. Plasmid-dependent phages (PDPs) are promising the
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Micro SF/F by O. Westin @microsff.com · 11/05/2026
A spaceship entered Earth's orbit and broadcast a message: "We are the Interstellar Library. Do you want to swap? We have thousands of stories." There were many replies. The library was silent for a whole day, then: "What do you mean, 'We have millions'?"
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Daniel Cazares @danielcazares.bsky.social · 11/05/2026
Happy to share that our latest research on the eco-evolutionary dynamics of MDR plasmids and PDPs is now out (open access vAuthor) in The ISME Journal doi.org/10.1093/isme... Here, we explored how plasmid-dependent phages (PDPs) act as a selective pressure against the spread of multidrug resistance
doi.org
Eco-evolutionary responses to plasmid-dependent phage constrain the spread of multidrug resistance plasmids
Abstract. Phage therapy offers a promising alternative to antibiotics for treating multidrug-resistant infections. Plasmid-dependent phages (PDPs) are part
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 07/05/2026
A voté! Very happy to be able to vote in Scotland, but I miss the french ritual and still a bit shocked by the absence of privacy in UK voting (although in my empty village hall no one was going to look over my shoulder)
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Ignacio (Nacho) de Quinto @nachodequinto.bsky.social · 07/05/2026
What if multireplicon plasmids are not an oddity, but an evolutionary strategy? We found that they are common, more mobile, broader-host-range, and enriched in AMR. Even more interesting: their assembly doesn’t look random. 👀 Paper preprint: www.biorxiv.org/content/10.6... Thread below!🧵👇
biorxiv.org
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Sonja Lehtinen @sonjalehtinen.bsky.social · 14/04/2026
Interested in predicting the dynamics of antibiotic resistance? Come work with us! We're looking for two postdocs to develop predictive models of resistance. We're interested in a range of approaches (mathematical & statistical modelling, causal inference, machine learning). tinyurl.com/6c4y3jke
tinyurl.com
Career Opportunities: Postdoctoral positions in predictive modelling of antibiotic resistance spread (22755)
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Raphael Laurenceau @raphael-microb.bsky.social · 16/04/2026
🔈Paper out! We turned the most fascinating phage host-switch mechanism, diversity-generating retroelements, into a programmable mutagenesis tool, DGRec. You can perform targeted hypermutation of any 50-200bp sequence directly in vivo in E. coli www.nature.com/articles/s41...
nature.com
Diversity-generating retroelements for programmable targeted hypermutagenesis - Nature Biotechnology
Diversity-generating retroelements are engineered for directed evolution in E.coli.
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José R Penadés @jrpenades.bsky.social · 05/04/2026
Latest from the lab! Between clinical S. aureus, most gene transfer mechanisms are blocked, yet lateral transduction remains highly efficient. Restriction modification-defective strains act as gateways for horizontal gene transfer, enabling DNA flow across populations. rdcu.be/fbNQK
rdcu.be
Immune-deficient bacteria serve as gateways to genetic exchange and microbial evolution
Nature Communications - The efficiency of horizontal gene transfer between different bacterial lineages is often unclear. Here, Figueroa et al. show that lateral transduction is the primary driver...
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Katie Mack @astrokatie.com · 02/04/2026
"The real threat is a slow, comfortable drift toward not understanding what you're doing. Not a dramatic collapse. Not Skynet. Just a generation of researchers who can produce results but can't produce understanding."
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Vivek Mutalik @vivekmutalik.bsky.social · 03/04/2026
📣Huge preprint 🔔 Today we share something our group has been working toward for a long time, led by @lucasmoriniere.bsky.social We asked can we predict which receptor a phage targets from its genome sequence alone? For most phages, we couldn’t. So Lucas set out to do something I had only dreamed of.
Phage receptor prediction from genome sequencing alone. Bacterial receptor (blue) interacting with phage proteins (purple) is shown here
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Aude Bernheim @audeber.bsky.social · 02/04/2026
How diverse is bacterial immunity ? We report in @science.org how language models allowed us to predict 2.4M antiphage proteins spanning >23K novel potential systems. 👏 @emordret.bsky.social, @alexhv.bsky.social & al doi.org/10.1126/scie... Explore them here defensefinder.mdmlab.fr/wiki/refseq_...
science.org
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hobbslabmicro.bsky.social @hobbslabmicro.bsky.social · 02/04/2026
Does anyone in the UK have a conjugative enterococcal resistance plasmid (e.g. pCF10) that they'd be willing to share? I'm finding it impossible to find one! (Next step is to try US folks, but that will require an import permit). Thanks!
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 02/04/2026
And the preprint is out! www.biorxiv.org/content/10.6... We compared plasmid conjugation in liquid and on solid across 13 AMR plasmids with different types of conjugative pili.
biorxiv.org
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 31/03/2026
First paper submitted fully from the lab!
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Rachel M. Wheatley @rachelmwheatley.bsky.social · 30/03/2026
🔊 Looking for a Research Assistant in Bacterial Evolution to join my lab 🦠 🥼Main duties: Research (AMR + microbiome) + lab assistance. ⏲️ Post duration: 30 months 🗓️ Closing date for applications: 20th April 2026 💰 Salary: ~£35k Details and how to apply: tinyurl.com/2a3v66y7 Please share!
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
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Vaughn Cooper @vscooper.micropopbio.org · 30/03/2026
Now out in AEM @asm.org! 🎉🧪 *High school student-isolated mutants 👉🏻 novel genetic causes of biofilm-associated adaptations *We learn how diversity arises quickly and is maintained *EvolvingSTEM enables scalable research in classrooms & promotes scientific literacy journals.asm.org/eprint/FBU9M...
journals.asm.org
Genetic diversification of Pseudomonas fluorescens maintained by multi-niche selection within biofilms | Applied and Environmental Microbiology
Bacterial biofilms dominate microbial life; however, their evolutionary genetics remain incompletely understood. Extensive replication of biofilm selection experiments by secondary school students can...
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Olaya Rendueles @olayarendueles.bsky.social · 26/03/2026
So happy to see this finally published in @plosbiology.org! This is the first chapter of @julielebris.bsky.social PhD thesis demonstrating how capsules are exchanged by plug-and-play dynamics w/ @epcrocha.bsky.social #microsky @klebclub.bsky.social Link below- Check out her 🧵 for more details!
doi.org
Plug-and-play evolution of the Klebsiella pneumoniae capsule locus enables serotype exchange across genetic backgrounds
How complex multi-gene systems evolve across genetic backgrounds without disruptive epistasis remains unclear, particularly in highly exchangeable loci such as the capsule of Klebsiella pneumoniae. Th...
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MGE Workshop @mgeworkshop.bsky.social · 20/03/2026
It is a pleasure to announce the 4th UK MGE workshop will be in York on 23rd-24th June 2026! Registration is free and we are actively looking for contributors. Interested? If so, please register via the website and select the talk option www.ukmgeworkshop.org We look forward to seeing you in York!
ukmgeworkshop.org
MGE-UK-4
We are thrilled to invite you to the fourth edition of the MGE UK Workshop, hosted this year in the historic City of York. Mobile Genetic Elements (MGEs) are the ultimate architects of biology. MGEs i...
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Shu-Sin Chng @figlegend.bsky.social · 23/03/2026
Here is it! Super new science from us on horizontal gene transfer & bact defense systems! Liyana OW YONG discovered the first-of-its-kind defense factor AbjA that triggers 'abortive conjugation' as a defense mechanism, by targeting the T4SS! How neat?! #MicroSky 1/7 www.biorxiv.org/content/10.6...
biorxiv.org
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Tatiana Dimitriu @tatianadimitriu.bsky.social · 24/03/2026
Cats are not allowed outside yet, but the neighbour is very keen to meet. Before they joined me, he would scroll around the garden (possibly trying to spy on badgers), but not try to look inside, and now that's all he's interested in.
Photo of a black cat with a collar, peering through the window, taken from the outsideThe same cat, photo taken from the inside. Looks quite like a stalker.
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Andreas Haag @andreashaag.bsky.social · 27/02/2026
🚨 We’re hiring – MRC-funded Postdoc (3 yrs) Research Fellow to investigate how mobile genetic elements interact in Staphylococcus aureus and shape gene transfer and pathogenicity. University of St Andrews Closes 31 March 2026 www.jobs.ac.uk/job/DQR250/r... Enquiries: afh22@st-andrews.ac.uk
jobs.ac.uk
Research Fellow at University of St Andrews
Searching for an academic job? Explore this Research Fellow opening on jobs.ac.uk! Click to view more details and browse other academic jobs.
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Eduardo Rocha @epcrocha.bsky.social · 03/03/2026
Fantastic collaboration w/ @dbikard.bsky.social @audeber.bsky.social @rayanchikhi.bsky.social labs led by @jmouradesousa.bsky.social : We assessed the rates of variation of anti-phage systems in P4-like satellites and P2 helper phages. Quick conclusion: Huge variation! We focus on 4 key questions/5
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Pedro Dorado-Morales @doradomoralesp.bsky.social · 26/02/2026
New preprint out on bioRxiv! www.biorxiv.org/content/10.6... Can conjugative plasmids be used to control plasmid and pathogen spread? Follow me down the rabbit hole that led to this story 🧵
biorxiv.org
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Willem van Schaik @wvschaik.bsky.social · 20/02/2026
Fascinating and important study on Klebsiella plasmid diversity 'Plasmids from human, animal and marine [Klebsiella pneumoniae complex] isolates formed shared genetic clusters spanning ecological boundaries' www.microbiologyresearch.org/content/jour...
microbiologyresearch.org
A One Health study of Klebsiella pneumoniae species complex plasmids shows a highly diverse and ecologically adaptable plasmidome
Plasmids play a pivotal role in the horizontal gene transfer (HGT) of antimicrobial resistance (AMR) and virulence determinants among bacteria. Members of the Klebsiella pneumoniae species complex (Kp...
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Will Matlock @wtmatlock.bsky.social · 20/02/2026
🚨 New preprint 🚨 How promiscuous really are conjugative plasmids, and what does that mean for plasmid co-occurrence? A pleasure to collaborate with @craigmaclean.bsky.social on the first paper of my fellowship! www.biorxiv.org/content/10.6...
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Padre Pio @padrepio.bsky.social · 17/02/2026
Je ne sais pas comment dire autrement les choses que comme ça : la République va observer une minute de silence en l'honneur du militant d'un mouvement de factieux royalistes, identitaires et antisémites qui ont juré sa perte voilà plus d'un siècle.
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