Acquired AmpC β-lactamases can shape more than antibiotic resistance. Some CMY variants improve in vitro fitness, while CMY-2 increases flagella production and pathogenicity, new study reveals. 📖 shorturl.at/UGDGU ✍️ O. Hallal Ferreira Raro & coll. @asm.org #MicroSky #AMR #Microbiology

A cost-effective alveolus-on-chip model reveals that macrophages are key drivers of early 𝑀. 𝑡𝑢𝑏𝑒𝑟𝑐𝑢𝑙𝑜𝑠𝑖𝑠 infection, acting as a permissive niche and promoting spread across the alveolar barrier. #Tuberculosis #OrganOnChip 📖 shorturl.at/G2Jzt ✍️ Deboosere & coll. @ciilofficiel.bsky.social

New in @science.org Sci Transl Med: GPR84 emerges as a key driver of inflammation in Buruli ulcer. Inhibiting this receptor, together with antibiotics, promoted tissue repair in experimental infection. @mel-foulon.bsky.social & coll. 📖 shorturl.at/vyobG

𝐇𝐨𝐰 𝐝𝐨 𝐛𝐚𝐜𝐭𝐞𝐫𝐢𝐚 𝐭𝐮𝐫𝐧 𝐡𝐨𝐬𝐭 𝐬𝐭𝐫𝐞𝐬𝐬 𝐢𝐧𝐭𝐨 𝐯𝐢𝐫𝐮𝐥𝐞𝐧𝐜𝐞 𝐩𝐫𝐨𝐠𝐫𝐚𝐦𝐬? A new study in @natcomms.nature.com shows that Fe-S cluster damage activates the stringent response in 𝑆𝑎𝑙𝑚𝑜𝑛𝑒𝑙𝑙𝑎, 𝐸𝑛𝑡𝑒𝑟𝑜𝑏𝑎𝑐𝑡𝑒𝑟 and 𝐾𝑙𝑒𝑏𝑠𝑖𝑒𝑙𝑙𝑎. ✍️ @sronneau.bsky.social & coll. 📖 shorturl.at/zP3BB #Microbiology #StringentResponse #ppGpp

🦠 𝐇𝐨𝐰 𝑷𝒔𝒆𝒖𝒅𝒐𝒎𝒐𝒏𝒂𝒔 𝐬𝐮𝐫𝐯𝐢𝐯𝐞𝐬 𝐜𝐞𝐥𝐥 𝐰𝐚𝐥𝐥 𝐬𝐭𝐫𝐞𝐬𝐬 In 𝑃. 𝑎𝑒𝑟𝑢𝑔𝑖𝑛𝑜𝑠𝑎, elongasome dysfunction creates a strong dependence on peptidoglycan recycling, revealing a potential new antibacterial vulnerability. ✍️ @manonjanet.bsky.social & coll. @inaattree.bsky.social 📖 shorturl.at/dgpXX #MicroSky

Excited to share our new paper out today in @science.org 🎉 We show that HGT via natural competence drives diversification of chromosomal integrons in V. cholerae 🤩 Below a 🧵 on key findings incl. background on natural competence in V. cholerae 1/ #microsky #phagesky www.science.org/doi/10.1126/...

𝐇𝐨𝐰 𝐝𝐨𝐞𝐬 𝐄𝐏𝐄𝐂 𝐭𝐮𝐧𝐞 𝐡𝐨𝐬𝐭 𝐢𝐧𝐟𝐥𝐚𝐦𝐦𝐚𝐭𝐢𝐨𝐧 𝐚𝐭 𝐭𝐡𝐞 𝐯𝐞𝐫𝐲 𝐬𝐭𝐚𝐫𝐭 𝐨𝐟 𝐢𝐧𝐟𝐞𝐜𝐭𝐢𝐨𝐧? A new preprint from @i2bcparissaclay.bsky.social and @ulbruxelles.bsky.social shows rapid, coordinated Ca²⁺ responses in epithelial cells triggered by extracellular ATP. #EPEC #CalciumSignaling

𝐀 𝐬𝐢𝐧𝐠𝐥𝐞 𝐠𝐞𝐧𝐞 𝐥𝐨𝐬𝐬 𝐜𝐚𝐧 𝐫𝐞𝐰𝐢𝐫𝐞 𝐛𝐚𝐜𝐭𝐞𝐫𝐢𝐚𝐥 𝐦𝐞𝐭𝐚𝐥 𝐮𝐩𝐭𝐚𝐤𝐞. New preprint: the yersinopine system shifts from Fe (𝑌. 𝑝𝑠𝑒𝑢𝑑𝑜𝑡𝑢𝑏𝑒𝑟𝑐𝑢𝑙𝑜𝑠𝑖𝑠) to Zn (𝑌. 𝑝𝑒𝑠𝑡𝑖𝑠). Deleting 𝑐𝑛𝑡𝑄 reproduces the switch. A striking example of bacterial adaptation. ✍️ Laffont & coll. 📖 shorturl.at/uRBuP

𝐌𝐨𝐛𝐢𝐥𝐞 𝐠𝐞𝐧𝐞𝐭𝐢𝐜 𝐞𝐥𝐞𝐦𝐞𝐧𝐭𝐬 𝐝𝐨𝐧’𝐭 𝐣𝐮𝐬𝐭 𝐬𝐩𝐫𝐞𝐚𝐝 𝐫𝐞𝐬𝐢𝐬𝐭𝐚𝐧𝐜𝐞: 𝐭𝐡𝐞𝐲 𝐞𝐧𝐜𝐨𝐝𝐞 𝐚𝐧𝐭𝐢𝐛𝐢𝐨𝐭𝐢𝐜 𝐩𝐞𝐫𝐬𝐢𝐬𝐭𝐞𝐧𝐜𝐞, 𝐧𝐞𝐰 𝐬𝐭𝐮𝐝𝐲 𝐫𝐞𝐯𝐞𝐚𝐥𝐬. In 𝐿. 𝑝𝑛𝑒𝑢𝑚𝑜𝑝ℎ𝑖𝑙𝑎, ICE pP36 generates growth heterogeneity, fuels persister formation, and transfers tolerance to clinical isolates. ✍️ @personniclab.bsky.social & coll. 📖 shorturl.at/jNqHS

🔬 New work from the Mazel Lab engineers programmable conjugative plasmids to selectively target MDR bacteria and the resistance plasmid pOXA-48, blocking its spread in complex communities. ✍️ @amazeld.bsky.social & coll. @pasteur.fr 📖 shorturl.at/GZdJu #MicroSky #AntibioticResistance #Conjugation

🔬 Calcium triggers natural transformation in 𝐴𝑐𝑖𝑛𝑒𝑡𝑜𝑏𝑎𝑐𝑡𝑒𝑟 𝑏𝑎𝑢𝑚𝑎𝑛𝑛𝑖𝑖, boosting DNA uptake and resistance acquisition, reports the Charpentier Lab. Opens new doors for genetic engineering. ✍️ @labxc.bsky.social & coll. 📖 shorturl.at/F2GGl #MicroSky #AntibioticResistance #NaturalTransformation

🚨 𝐀𝐈 𝐦𝐞𝐞𝐭𝐬 𝐓𝐁 𝐝𝐫𝐮𝐠 𝐝𝐢𝐬𝐜𝐨𝐯𝐞𝐫𝐲! Imaging 𝐶. 𝑔𝑙𝑢𝑡𝑎𝑚𝑖𝑐𝑢𝑚 (a model for 𝑀. 𝑡𝑢𝑏𝑒𝑟𝑐𝑢𝑙𝑜𝑠𝑖𝑠) + deep learning reveals known, unseen, and novel antibiotic modes of action from images alone, a leap for TB drug discovery. ✍️ @awehenkel.bsky.social & coll. 📖 shorturl.at/9QPDy #Tuberculosis #MicroSky

Nouvelle percée en biologie parasitaire ! Une équipe française révèle comment RCC1-2 et APR8 orchestrent la construction de l’apical complex chez 𝘛𝘰𝘹𝘰𝘱𝘭𝘢𝘴𝘮𝘢 𝘨𝘰𝘯𝘥𝘪𝘪. ✍️ @gissotlab.bsky.social @lebrunlab.bsky.social & coll. 📖 shorturl.at/4q68P

New research shows strain-specific epithelial responses to 𝑆. 𝑝𝑛𝑒𝑢𝑚𝑜𝑛𝑖𝑎𝑒, with invasive strains driving distinct STAT3 signaling compared to carriage isolates, offering insight into asymptomatic carriage vs. inflammation. ✍️ @melanie-hamon.bsky.social & coll @pasteur.fr 📖 shorturl.at/a6aAQ #MicroSky

#ResultatScientifique🔎| La bactérie responsable de la tuberculose est capable d'évacuer les métaux toxiques pour résister au système immunitaire ✍️ @oneyrolles.bsky.social 🤝 @ipbstoulouse.bsky.social 📕 buff.ly/4R5iaMB ▶️

#Microbiology The anti-tuberculosis drug bedaquiline targets the mycobacterial ATP synthase, but how that leads to bacterial death is unclear Here the authors clarify how bedaquiline works @jnblab.bsky.social @morwan.me #TBSky #antibiotics #AMR http://dlvr.it/TQjZ0W

New from @cascaleslab.bsky.social: A new weapon in the T6SS arsenal. Jonas Desjardins et al. uncover a new family of T6SS toxins that target competitors’ metabolic core, defining a novel NAD(P)⁺ glycohydrolase family, Tne5. 📖 shorturl.at/3QhkS #MicroSky

New research from @pasteur.fr reveals how 𝐿𝑒𝑔𝑖𝑜𝑛𝑒𝑙𝑙𝑎 uses LpDot1 to methylate SFPQ, disrupting paraspeckles & rewiring host splicing, dampening immune genes like NF-κB2 & CD45 for survival. ✍️ @cbuch.bsky.social, @mrolando.bsky.social & coll. 📖 Read the preprint: shorturl.at/kFh8z #MicroSky

New study uncovers mitochondrial DNA G-quadruplexes as druggable targets in Plasmodium falciparum, with RHPS4 showing strong activity against resistant #malaria parasites. ✍️ Mariam Salim & coll. @ipbstoulouse.bsky.social @lcc-cnrs.bsky.social 📖 shorturl.at/wlVit #InfectiousDiseases #DrugDiscovery

New research shows cannabidiol inhibits HIV-1 infection across key mucosal immune cells via TRPV1 activation and CGRP signaling, blocking early transmission events. A promising avenue for future #HIV prevention. ✍️ CC Barbosa Bomfim & coll. @institutcochin.bsky.social 📖 shorturl.at/Fdz7g #Microsky

New study reveals a high-resolution genetic map of how E. coli adapts to the gut, showing diet- and inflammation-dependent metabolism, niche shifts, and unexpected roles for mobile genetic elements. ✍️ @amandinemaire.bsky.social & coll. 📖 shorturl.at/DYSTv #Microbiome #Pathogenesis #Microsky

Epstein-Barr virus protein EBNA-1 targets the nucleolus in G1/S phase, cuts rRNA synthesis by 50%, and triggers oxidative stress, all via EBP2. A new viral survival strategy? ✍️ M. Chabi, N. Jourdan & coll. @ibps.bsky.social 📖 shorturl.at/uReKo #Virology #CancerResearch

New study reveals how Pseudomonas aeruginosa delivers the T6SS phospholipase Tle1 and avoids self-intoxication. Structural and experimental data identify Tli1a as the key immunity protein. ✍️ @del-leica99-98.bsky.social & coll. 📖 shorturl.at/hRHg2 #MiscoSky #TypeVISecretion #Pseudomonas

Come and visit me in Paris! #Shigella2026 - travel bursaries deadline tomorrow. Submit your abstracts at www.shigella2026.conferences-pasteur.org/home

We propose immuno-centric view of secreted polymorphic toxin diversification and involvement of novel XPC systems in this process! Fantastic work of @jmartinkus.bsky.social with lab of @cascaleslab.bsky.social ! www.cell.com/current-biol...

🔬 Call to create junior research groups at the Institut Pasteur Focus: Infectious diseases, host-microbe interactions, vaccines Special interest: AI methodologies 📅 Deadline: Feb 9, 2026 👥 2-12 years post-PhD Apply now 📝 research.pasteur.fr/en/call/crea... #JobOpportunity #Research

🧬 A new “Life Identification Number (LIN)” system aims to modernize bacterial classification with a clearer, more stable hierarchy. A step forward for genomic taxonomy! 📖 shorturl.at/vkQuS ✍️ @sylvainbrisse.bsky.social & coll. @pasteur.fr @ox.ac.uk @monashuniversity.bsky.social @lshtm.bsky.social

👏👏👏 Bravo @hakimi.bsky.social on winning the 2025 @inserm.fr Research Prize and the @fondationdefrance.bsky.social Allianz Prize! Hakimi's team is cracking #Toxoplasma's secrets, and developing innovative therapies to block transmission. @academiesciences.bsky.social ©Inserm/François Guénet

Scientists can now visually track full-length #HIV genomes hiding inside cells, in real time. This new imaging technique reveals where silent viral reservoirs form, offering a powerful path toward curative strategies. #HIVresearch #CureHIV 📖 shorturl.at/ZN6hC ✍️ F. Di Nunzio & coll. @pasteur.fr

Infections don’t enter the body in one big burst, they trickle in over time, new study reveals. This changes how we understand disease and could help us spot early warning signs sooner! 📖 shorturl.at/RxxXo ✍️ @nemopeeters.bsky.social & coll. @lipme-toulouse.bsky.social #MicroSky #PlantScience

Viral coinfections aren’t additive, order matters. Flu often blocks COVID via strong IFN responses, RSV can boost later flu, and each pairing triggers unique cell programs. Timing shapes outcomes for care and modeling. 📖 shorturl.at/KH8cf ✍️ @olivierterrier.bsky.social & coll. @ciri-lyon.bsky.social

Two M. tuberculosis RelE toxins don’t cut mRNA, they slice 16S rRNA itself, shutting down translation in a totally unexpected way, new study reveals. A big leap in understanding TB’s survival tricks and new angles for therapies. 📖 shorturl.at/Z8MVX ✍️ @genevauxpierre.bsky.social & coll. #MicroSky

🚨 MONTHLY ANTIBIOTOLERANCE WEBINAR SERIES 2025-2026 Friday Nov 14, 3 PM Invited speakers: Sophie Helaine & Audrey Menegaz Proenca More info and registration here 👉 www.sfm-microbiologie.org/evenement/mo... #Microbiology #Microsky

🚨 Save the date! The Annual Congress of the French Society for Microbiology is heading to Lyon, Oct 7-9, 2026! An unmissable event for all microbe lovers. More information coming soon #SFM2026 #Microbiology #MicroSky @sfmicrobiologie.bsky.social

In flies and worms, more pathogenic viruses caused greater aging acceleration, and the effect lingered even after clearance, new study reveals. #Aging #Infection #MicroSky #Virology 📖 shorturl.at/OeYVp ✍️ @rubengonzalez.bsky.social @castellosanjuan.bsky.social @salehlabparis.bsky.social @pasteur.fr

Exciting #postdoc opportunity in KL Ung's group! Understanding the molecular mechanisms of cell wall remodeling in pathogens Learn more: shorturl.at/gPuFV Deadline: January 15, 2026 Contact: [email protected] #Protein #Biochemistry #StructuralBiology #Biophysics #CryoEM

Excessive Ca²⁺ signaling fuels inflammation in a zebrafish model of #cysticfibrosis, and verapamil, an FDA-approved Ca²⁺ channel blocker, restores balance & limits inflammation, new study reveals. A promising repurposing opportunity for CF therapy! 📖 shorturl.at/Fxg9F ✍️ @sarahdja.bsky.social & coll.

Phages are not always fast-evolving chaos machines. In an oyster farm, Vibrio phages stayed genetically identical for 4 yrs, showing surprising viral stability shaped by nested ecology & mobile genetic elements. ✍️ @fredoleroux.bsky.social @epcrocha.bsky.social & coll. 📖 shorturl.at/Nq8G1 #MicroSky

tRNA-modification mutants in mycobacteria boost antibiotic recalcitrance by activating WhiB7 & coupling alanine metabolism to ribosome rescue and survival, new study reveals. ✍️ @jvaubourgeix.bsky.social & coll. 📖 shorturl.at/86JTs #MicroSky #AMR #RNAsky @imperialcollegeldn.bsky.social @inserm.fr

Staphylococcus aureus EVs are more than cargo carriers, they’re immune modulators. New work on MRSA N315 EVs reveals selective uptake, RNA release, and activation of TLR and NOD2 signaling. ✍️ Julia Papail, Eric Guédon & coll. @inrae-bzhndie.bsky.social 📖 shorturl.at/EuXh0 #MicroSky #Staphylococcus

New study suggests fetal brain vulnerability to Oropouche virus (OROV) in early pregnancy: Epidemic-related strain infects human neural progenitors & brain organoids, causing proliferation arrest, apoptosis & loss of brain architecture. #Virology ✍️ Alexandra Albert & coll. 📖 shorturl.at/nhO8F

New study shows pyrazinamide kills TB by acidifying bacterial cytosol — not via PanD/CoA depletion. A long-standing debate settled, paving the way for smarter PZA-like drugs. #MicroSky ✍️ J. Laudouze, Y. Antonenko, @alexandregouzy.bsky.social, @pierresantucci.bsky.social & coll. 📖 shorturl.at/tuz6Q

Excited to share Wendy Le Mouëllic’s PhD work, now published in @pnas.org! It reveals that M. tuberculosis depends on inorganic sulfate import to survive inside host cells—fueling essential processes such as redox balance and stress resistance. Huge congrats to Wendy & colleagues! shorturl.at/WbFQC

Turns out even kings had ordinary mouths. A new study of King Richard III’s dental calculus shows his oral microbiome wasn’t so different from the common folk’s, despite a royal diet and lifestyle. #AncientDNA #Microbiome #MicroSky

Mycobacterium tuberculosis forms nitrate-induced intracytoplasmic membranes (MIMs) that rewire metabolism & dampen inflammation during infection, uncovering a new layer of bacterial adaptation! ✍️ @camimille.bsky.social @enningalab.bsky.social @pasteur.fr 📖 shorturl.at/9kbDM

We are looking to hire post-docs to work on T cell responses to M. tuberculosis infection using murine and NHP models. If you know T cells and wanna work on the top global infectious killer check us out. BSL3 experience not required. The NIH intramural program in Bethesda MD is an amazing place!

Streptococcus pneumoniae can induce competence via the ClpX/ClpP protease through the RipA toxin, which stresses replication and activates comCDE. Metabolically active but dying cells release CSP, spreading competence to neighbors. #MicroSky ✍️ @polardlab.bsky.social & coll. 📖 shorturl.at/E9ael

Listeria monocytogenes doesn’t just rush to the cytosol. It can replicate in permeated epithelial phagosomes lacking cathepsin D, where LLO sustains growth, PlcB drives escape, and the PrfA program is primed. ✍️ @alicelebreton.bsky.social & coll. @ibensens.bsky.social 📖 shorturl.at/1bFph

#Dengue virus slips infection-boosting RNAs into mosquito saliva by hitching a ride in EVs, a study finds. The viral RNA hooks onto a mosquito protein, AeSyntenin, to get packaged and released. #MicroSky #Virology ✍️ @julienpompon.bsky.social & coll. @ird-fr.bsky.social 📖 shorturl.at/lxUyw

A 2-year postdoc position in my lab, under the supervision of P-Alex Kaminski, on Z-DNA phages and the benefit given by ZTGC DNA and the replication machinery, with attempt to create a Z based minireplicon research.pasteur.fr/en/job/a-two...