Fabrice Jean-Pierre
@fabricejpierre.bsky.social
Assistant Professor @USherbrooke | Polymicrobial biofilms, interactions & mechanisms of recalcitrance | he/him
https://www.fjplab.com/
https://scholar.google.ca/citations?user=N5UlGZgAAAAJ&hl=en
https://www.fjplab.com/
https://scholar.google.ca/citations?user=N5UlGZgAAAAJ&hl=en
Pinned
Pseudomonas aeruginosa supports the survival of Prevotella melaninogenica in a cystic fibrosis lung polymicrobial community through metabolic cross-feeding | mBio
Polymicrobial interactions impact disease outcomes in pwCF who suffer from chronic
respiratory infections. Previous work established a CF-relevant polymicrobial community
model that allows experimenta...
journals.asm.org
Happy to finally see this out! Bassam El Halfi (@bassamhafi.bsky.social - my first rotation student when I started my post-doc in @geiselbiofilm.bsky.social) did an amazing job investigating mechanisms of interspecies metabolic interactions. Check it out! #microsky
journals.asm.org/doi/10.1128/...
journals.asm.org/doi/10.1128/...
Reposted by Fabrice Jean-Pierre
We're finishing up our 30th M2P2 retreat, with Salvador Almagro-Moreno - our keynote for the Ron Taylor Keynote lecture, a poster session, two career development workshops and ~120 attendees from across northern New England. We also had some open time to network - plus skating & skiing. m2p2.org
February 13, 2026 at 5:08 PM
We're finishing up our 30th M2P2 retreat, with Salvador Almagro-Moreno - our keynote for the Ron Taylor Keynote lecture, a poster session, two career development workshops and ~120 attendees from across northern New England. We also had some open time to network - plus skating & skiing. m2p2.org
Reposted by Fabrice Jean-Pierre
Excited for this new preprint from former postdoc @caitlinkowa.bsky.social identifying unexpected functions for the bacterial stringent response in antimicrobial fatty acid susceptibility in S. aureus #microsky
www.biorxiv.org
February 5, 2026 at 9:52 PM
Excited for this new preprint from former postdoc @caitlinkowa.bsky.social identifying unexpected functions for the bacterial stringent response in antimicrobial fatty acid susceptibility in S. aureus #microsky
Reposted by Fabrice Jean-Pierre
Can someone pinpoint if there is a Pseudomonas putida (e.g. KT2442) database where we can find out which lab has certain deletion mutants and/or report strains?
Coming from the B.subtilis field with #SubtiWiki containing all these info, it is difficult to find all available mutants in the papers
Coming from the B.subtilis field with #SubtiWiki containing all these info, it is difficult to find all available mutants in the papers
February 10, 2026 at 2:50 PM
Can someone pinpoint if there is a Pseudomonas putida (e.g. KT2442) database where we can find out which lab has certain deletion mutants and/or report strains?
Coming from the B.subtilis field with #SubtiWiki containing all these info, it is difficult to find all available mutants in the papers
Coming from the B.subtilis field with #SubtiWiki containing all these info, it is difficult to find all available mutants in the papers
Reposted by Fabrice Jean-Pierre
Unveiling hidden variables in stressed bacteria
@cp-cellreports.bsky.social Review by @divyach.bsky.social and @maxencevincent.bsky.social
www.cell.com/cell-reports...
@cp-cellreports.bsky.social Review by @divyach.bsky.social and @maxencevincent.bsky.social
www.cell.com/cell-reports...
February 11, 2026 at 8:40 AM
Unveiling hidden variables in stressed bacteria
@cp-cellreports.bsky.social Review by @divyach.bsky.social and @maxencevincent.bsky.social
www.cell.com/cell-reports...
@cp-cellreports.bsky.social Review by @divyach.bsky.social and @maxencevincent.bsky.social
www.cell.com/cell-reports...
Our new paper in @natcomms.nature.com is now online-early!
We describe independent evolution of bacterial genomes of only ~50–52 kb — the smallest known outside cellular organelles — revealing striking convergence toward minimal gene sets.
🔗 doi.org/10.1038/s414...
We describe independent evolution of bacterial genomes of only ~50–52 kb — the smallest known outside cellular organelles — revealing striking convergence toward minimal gene sets.
🔗 doi.org/10.1038/s414...
February 11, 2026 at 12:04 PM
Reposted by Fabrice Jean-Pierre
Trump slump? Attendance plummets at some science meetings, but others hold steady | Science | AAAS www.science.org/content/arti...
Trump slump? Attendance plummets at some science meetings, but others hold steady
Amid travel bans, a government shutdown, and funding crunches, 2025 was a turbulent year for U.S. scientific societies
www.science.org
February 6, 2026 at 1:51 PM
Trump slump? Attendance plummets at some science meetings, but others hold steady | Science | AAAS www.science.org/content/arti...
Reposted by Fabrice Jean-Pierre
New paper out! Here's a puzzle: phototrophy, the ability to use light for energy, is one of life's great innovations. It evolved early and transformed the biosphere. But it evolved 2x. Why not just once, why not more? Our work suggests the answer is priority effects.
www.nature.com/articles/s44...
www.nature.com/articles/s44...
Priority effects inhibit the repeated evolution of phototrophy - npj Complexity
npj Complexity - Priority effects inhibit the repeated evolution of phototrophy
www.nature.com
February 3, 2026 at 9:37 PM
New paper out! Here's a puzzle: phototrophy, the ability to use light for energy, is one of life's great innovations. It evolved early and transformed the biosphere. But it evolved 2x. Why not just once, why not more? Our work suggests the answer is priority effects.
www.nature.com/articles/s44...
www.nature.com/articles/s44...
Reposted by Fabrice Jean-Pierre
glad so many of you *like* the 𝘝𝘢𝘮𝘱𝘺𝘳𝘦𝘭𝘭𝘢 having lunch 🙂
but don't miss the recent work of beryl rapaport et al. on another amoeba, 🔥 𝘐𝘯𝘤𝘦𝘯𝘥𝘪𝘢𝘮𝘰𝘦𝘣𝘢 𝘤𝘢𝘴𝘤𝘢𝘥𝘦𝘯𝘴𝘪𝘴 🔥dancing at 63°C
on STC 👉 smallthingsconsidered.blog/schaechter/2...
but don't miss the recent work of beryl rapaport et al. on another amoeba, 🔥 𝘐𝘯𝘤𝘦𝘯𝘥𝘪𝘢𝘮𝘰𝘦𝘣𝘢 𝘤𝘢𝘴𝘤𝘢𝘥𝘦𝘯𝘴𝘪𝘴 🔥dancing at 63°C
on STC 👉 smallthingsconsidered.blog/schaechter/2...
February 3, 2026 at 5:02 PM
glad so many of you *like* the 𝘝𝘢𝘮𝘱𝘺𝘳𝘦𝘭𝘭𝘢 having lunch 🙂
but don't miss the recent work of beryl rapaport et al. on another amoeba, 🔥 𝘐𝘯𝘤𝘦𝘯𝘥𝘪𝘢𝘮𝘰𝘦𝘣𝘢 𝘤𝘢𝘴𝘤𝘢𝘥𝘦𝘯𝘴𝘪𝘴 🔥dancing at 63°C
on STC 👉 smallthingsconsidered.blog/schaechter/2...
but don't miss the recent work of beryl rapaport et al. on another amoeba, 🔥 𝘐𝘯𝘤𝘦𝘯𝘥𝘪𝘢𝘮𝘰𝘦𝘣𝘢 𝘤𝘢𝘴𝘤𝘢𝘥𝘦𝘯𝘴𝘪𝘴 🔥dancing at 63°C
on STC 👉 smallthingsconsidered.blog/schaechter/2...
Abstract submission deadline for the 2026 Eurobiofilms meeting is approaching! For more info see link below.
#microsky #biofilms
eurobiofilms2026.org
#microsky #biofilms
eurobiofilms2026.org
Eurobiofilms 2026
We are absolutely thrilled to host the Eurobiofilms 2026 in Guimarães, Portugal, from the 17th to 20th of June! We look forward to welcoming you to this exciting event.
eurobiofilms2026.org
January 29, 2026 at 2:43 PM
Abstract submission deadline for the 2026 Eurobiofilms meeting is approaching! For more info see link below.
#microsky #biofilms
eurobiofilms2026.org
#microsky #biofilms
eurobiofilms2026.org
Cool stuff!
“A quorum-sensing molecule from Pseudomonas aeruginosa induces defensive multicellularity in a coinfecting pathogen”
#microsky
“A quorum-sensing molecule from Pseudomonas aeruginosa induces defensive multicellularity in a coinfecting pathogen”
#microsky
A quorum-sensing molecule from Pseudomonas aeruginosa induces defensive multicellularity in a coinfecting pathogen | PNAS
Microorganisms commonly exist in polymicrobial communities, where they can respond
to interspecies secreted molecules by altering behaviors and phy...
www.pnas.org
January 29, 2026 at 11:06 AM
Cool stuff!
“A quorum-sensing molecule from Pseudomonas aeruginosa induces defensive multicellularity in a coinfecting pathogen”
#microsky
“A quorum-sensing molecule from Pseudomonas aeruginosa induces defensive multicellularity in a coinfecting pathogen”
#microsky
Reposted by Fabrice Jean-Pierre
Lactic acid lover? Check out @ronni.bsky.social 's new work in
@cp-cellhostmicrobe.bsky.social showing how Enterococcus faecalis-derived LA suppresses macrophage activation, in turn promoting bacterial persistence and polymicrobial wound infection in vivo.
www.sciencedirect.com/science/arti...
@cp-cellhostmicrobe.bsky.social showing how Enterococcus faecalis-derived LA suppresses macrophage activation, in turn promoting bacterial persistence and polymicrobial wound infection in vivo.
www.sciencedirect.com/science/arti...
Enterococcus faecalis-derived lactic acid suppresses macrophage activation to facilitate persistent and polymicrobial wound infections
Macrophage activation is essential for innate immunity and antimicrobial defense. We show that Enterococcus faecalis suppresses macrophage activation …
www.sciencedirect.com
January 27, 2026 at 7:11 PM
Lactic acid lover? Check out @ronni.bsky.social 's new work in
@cp-cellhostmicrobe.bsky.social showing how Enterococcus faecalis-derived LA suppresses macrophage activation, in turn promoting bacterial persistence and polymicrobial wound infection in vivo.
www.sciencedirect.com/science/arti...
@cp-cellhostmicrobe.bsky.social showing how Enterococcus faecalis-derived LA suppresses macrophage activation, in turn promoting bacterial persistence and polymicrobial wound infection in vivo.
www.sciencedirect.com/science/arti...
How do you react when your favorite microbe is renamed by taxonomists who are completely outside your field—and who ignore the community that actually works with it? Here is our clear answer re the case of Pseudomonas putida KT2440 👉🏻 journals.asm.org/doi/10.1128/...
The disputed identity of Pseudomonas putida KT2440: when taxonomists rename your favorite microbe | mBio
Names matter; they are not mere labels. They operate as anchors of memory, social coordinates, and references of collective identity. When a name becomes established through long-term
use and broad ad...
journals.asm.org
January 27, 2026 at 5:12 PM
Reposted by Fabrice Jean-Pierre
How do you react when your favorite microbe is renamed by taxonomists who are completely outside your field—and who ignore the community that actually works with it? Here is our clear answer re the case of Pseudomonas putida KT2440 👉🏻 journals.asm.org/doi/10.1128/...
The disputed identity of Pseudomonas putida KT2440: when taxonomists rename your favorite microbe | mBio
Names matter; they are not mere labels. They operate as anchors of memory, social coordinates, and references of collective identity. When a name becomes established through long-term
use and broad ad...
journals.asm.org
January 27, 2026 at 4:54 PM
How do you react when your favorite microbe is renamed by taxonomists who are completely outside your field—and who ignore the community that actually works with it? Here is our clear answer re the case of Pseudomonas putida KT2440 👉🏻 journals.asm.org/doi/10.1128/...
Reposted by Fabrice Jean-Pierre
www.pnas.org/doi/10.1073/...
Excited to share that PNAS published our research article focused on "Why are Ralstonia goofy?"
Excited to share that PNAS published our research article focused on "Why are Ralstonia goofy?"
January 23, 2026 at 5:43 AM
www.pnas.org/doi/10.1073/...
Excited to share that PNAS published our research article focused on "Why are Ralstonia goofy?"
Excited to share that PNAS published our research article focused on "Why are Ralstonia goofy?"
Reposted by Fabrice Jean-Pierre
New in JB: Khan, Palmer & Guan identified the genes for glucosaminyl phosphatidylglycerol biosynthesis, opening the way to study this lipid in P. aeruginosa.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
January 19, 2026 at 10:29 PM
New in JB: Khan, Palmer & Guan identified the genes for glucosaminyl phosphatidylglycerol biosynthesis, opening the way to study this lipid in P. aeruginosa.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
Reposted by Fabrice Jean-Pierre
Application deadline for this postdoc position in my group closing next week 🦠 thank you all who have shared so far!
🔊 Job Opportunity: Postdoctoral Research Fellow in Bacterial Evolution.
Looking to recruit a postdoc to join a UKRI FLF-funded project on antibiotic resistance evolution in the microbiome 🦠
3 years funding, deadline 26th Jan, please share!
hrwebapp.qub.ac.uk/tlive_webrec...
Looking to recruit a postdoc to join a UKRI FLF-funded project on antibiotic resistance evolution in the microbiome 🦠
3 years funding, deadline 26th Jan, please share!
hrwebapp.qub.ac.uk/tlive_webrec...
Job profile
hrwebapp.qub.ac.uk
January 19, 2026 at 11:32 AM
Application deadline for this postdoc position in my group closing next week 🦠 thank you all who have shared so far!
The School of Life Sciences at the University of Nevada, Las Vegas invites applications for a tenure-track Assistant Professor in Cell and Molecular Biology. Please share! #microsky
Assistant Professor in Cell and Molecular Biology, School of Life Sciences - Las Vegas, Nevada job with University of Nevada, Las Vegas | 676808
The University of Nevada, Las Vegas invites applications for Assistant Professor in Cell and Molecular Biology, School of Life Sciences [R0150201]....
can01.safelinks.protection.outlook.com
January 17, 2026 at 9:36 PM
The School of Life Sciences at the University of Nevada, Las Vegas invites applications for a tenure-track Assistant Professor in Cell and Molecular Biology. Please share! #microsky
Reposted by Fabrice Jean-Pierre
🚨4-year fully funded PhD in the lab of @magicmicrobe.bsky.social (& collaborating with me!): How does iron availability shape the ability of pathogens to invade the gut microbiome?
Apply by Jan 26th
Advert: research.reading.ac.uk/foodbiosyste...
How to apply: research.reading.ac.uk/foodbiosyste...
Apply by Jan 26th
Advert: research.reading.ac.uk/foodbiosyste...
How to apply: research.reading.ac.uk/foodbiosyste...
research.reading.ac.uk
January 15, 2026 at 7:42 PM
🚨4-year fully funded PhD in the lab of @magicmicrobe.bsky.social (& collaborating with me!): How does iron availability shape the ability of pathogens to invade the gut microbiome?
Apply by Jan 26th
Advert: research.reading.ac.uk/foodbiosyste...
How to apply: research.reading.ac.uk/foodbiosyste...
Apply by Jan 26th
Advert: research.reading.ac.uk/foodbiosyste...
How to apply: research.reading.ac.uk/foodbiosyste...
Cool work! #microsky
Loss of Fsr quorum sensing promotes biofilm formation and worsens outcomes in enterococcal infective endocarditis
@natcomms.nature.com by @harisantypas.bsky.social et al from @kimingeneva.bsky.social
www.nature.com/articles/s41...
@natcomms.nature.com by @harisantypas.bsky.social et al from @kimingeneva.bsky.social
www.nature.com/articles/s41...
Loss of Fsr quorum sensing promotes biofilm formation and worsens outcomes in enterococcal infective endocarditis - Nature Communications
Infective endocarditis (IE) is an understudied biofilm-associated infection. Here, analyses of preclinical and clinical data reveal that the Fsr quorum sensing (QS) system of Enterococcus faecalis is ...
www.nature.com
January 16, 2026 at 1:56 PM
Cool work! #microsky
Reposted by Fabrice Jean-Pierre
Summer REU in biofilms! Pls share.
www.binghamton.edu/centers/biof...
www.binghamton.edu/centers/biof...
Research Experience for Undergraduates (REU) | Biofilm Research Center | Binghamton
University
www.binghamton.edu
January 16, 2026 at 12:34 AM
Summer REU in biofilms! Pls share.
www.binghamton.edu/centers/biof...
www.binghamton.edu/centers/biof...
Reposted by Fabrice Jean-Pierre
Grinnell College has openings for two 1-year term positionsto teach microbiology and immunology. More information here:
apply.interfolio.com/179939
apply.interfolio.com/179939
Apply - Interfolio
{{$ctrl.$state.data.pageTitle}} - Apply - Interfolio
apply.interfolio.com
January 12, 2026 at 6:41 PM
Grinnell College has openings for two 1-year term positionsto teach microbiology and immunology. More information here:
apply.interfolio.com/179939
apply.interfolio.com/179939
Reposted by Fabrice Jean-Pierre
JB Editor's Choice: Galyon, Atomi & Santangelo describe the history of Thermococcales as a model system, & where the field is going. A great primer for this organism.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
See our whole Model Systems collection! journals.asm.org/topic/sss-ta...
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
See our whole Model Systems collection! journals.asm.org/topic/sss-ta...
January 8, 2026 at 2:36 PM
JB Editor's Choice: Galyon, Atomi & Santangelo describe the history of Thermococcales as a model system, & where the field is going. A great primer for this organism.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
See our whole Model Systems collection! journals.asm.org/topic/sss-ta...
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
See our whole Model Systems collection! journals.asm.org/topic/sss-ta...
Reposted by Fabrice Jean-Pierre
JB Editor's Choice: Morales Moreira, Haney et al. explore the conservation of genes required for production of the nitroimidazole antibiotic azomycin, made by a variety of pseudomonads. And show that this compound can kill omycete pathogens.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
January 7, 2026 at 4:50 PM
JB Editor's Choice: Morales Moreira, Haney et al. explore the conservation of genes required for production of the nitroimidazole antibiotic azomycin, made by a variety of pseudomonads. And show that this compound can kill omycete pathogens.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology
Reposted by Fabrice Jean-Pierre
How does E. coli age? According to this #mBio study, the the decisive factor driving growth decline in E. coli is not the presence of protein aggregates, but the fraction of the intracellular space they occupy. Learn more: asm.social/2KZ
January 7, 2026 at 5:38 PM
How does E. coli age? According to this #mBio study, the the decisive factor driving growth decline in E. coli is not the presence of protein aggregates, but the fraction of the intracellular space they occupy. Learn more: asm.social/2KZ
Reposted by Fabrice Jean-Pierre
Congratulations to Sean Yu-Hao Wang, Will DePas, @catarmbruster.bsky.social and colleagues on their use of experimental evolution to identify regulators of Mycobacterium abscessus biofilm production!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...
Experimental evolution in the cystic fibrosis chemical environment reveals early TCA cycle flux as a central regulator of Mycobacterium abscessus biofilm formation
Mycobacterium abscessus (MAB) is an emerging opportunistic pathogen that can cause severe, recalcitrant pulmonary infections in susceptible groups, in…
www.sciencedirect.com
January 6, 2026 at 3:40 PM
Congratulations to Sean Yu-Hao Wang, Will DePas, @catarmbruster.bsky.social and colleagues on their use of experimental evolution to identify regulators of Mycobacterium abscessus biofilm production!
www.sciencedirect.com/science/arti...
www.sciencedirect.com/science/arti...