Fabrice Jean-Pierre

New tools unlock #Bdellovibrio bacteriovorus’s predatory secrets 🦠. By combining inducible gene expression with #CRISPRi-mediated depletion for precise control of essential genes, @lalouxlab.bsky.social uncovered new insights into its unique lifecycle and cell division.
buff.ly/FcDzAY4

Pseudomonas aeruginosa-secreted respiratory toxin HQNO triggers fatty acid accumulation in respiring Staphylococcus aureus, decreasing SaeRS-dependent transcriptional regulation | Journal of Bacteriol... Pseudomonas aeruginosa and Staphylococcus aureus are often co-isolated from the airways of cystic fibrosis patients. P. aeruginosa secretes non-essential metabolites that alter S. aureus physiology, p...

“Pseudomonas aeruginosa-secreted respiratory toxin HQNO triggers fatty acid accumulation in respiring Staphylococcus aureus, decreasing SaeRS-dependent transcriptional regulation” #microsky

journals.asm.org/doi/full/10....

Extension de la date limite pour la soumission de résumés pour le BiSP2025/Micrhub au mercredi 15 octobre prochain à midi. Ne manquez pas ça ! @micrhub.bsky.social #microsky

Visual description: image shows view of the Bayview Ballroom - Kovens Conference Center Miami, Florida, where Microbes in Microbiomes will be taking place 18 - 20 February 2026. Bottom-right features a blue circle that reads 'Register now' and the Microbiology Society logo.

Abstract submissions are closing! Submit your abstract for the Microbes in Microbiomes Miami 2026 meeting now! Submissions close Monday 20 October 2025 23:59 GMT. Apply today - microb.io/MiM26Abstracts #MiM26

Open position to work on Type IX secretion (#T9SS) in our lab, in collaboration withe the group of Eric Reynolds at the Dental School of the University of Melbourne. Please spread the word, and forward to anyone potentially interested ! Apply here:
emploi.cnrs.fr/Offres/Docto...

To all my Pseudomonas aficionados: The 2026 International Pseudomonas Conference will take place on December 13-17, 2026 in Faridabad (close to New Delhi), India. Check it out! #microsky

pseudomonas.io/home

Just a reminder about our faculty search at Dartmouth’s Geisel School of Medicine. Applications due Oct. 15. @dartmouthbcb.bsky.social

New in JB: Singh, Chattopadhyay et al. review the many roles of the hemolysin/cytolysin of V. cholerae in host-pathogen interactions.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

Excited to be part of this collaboration with the Burrows lab exploring twitching and surface surface sensing by P. aeruginosa. This work further delineates a role for the T4P motor proteins and pili for surface sensing.
journals.asm.org/doi/10.1128/...
@asm.org

Comprehensive genetic interaction analysis of the Bacillus subtilis envelope using double-CRISPRi Koo et al. apply genome-scale double-CRISPRi to map cell envelope gene interactions in Bacillus subtilis, revealing >1,000 genetic interactions and uncovering gene networks in envelope biogenesis and ...

Comprehensive genetic interaction analysis of the Bacillus subtilis envelope using double-CRISPRi

-in @cp-cellsystems.bsky.social by Byoung-Mo Koo, Horia Todor et al from Carol Gross & Jason Peters
with @jordivangestel.bsky.social, @microbanta.bsky.social, KC Huang

www.cell.com/cell-systems...

Finally out, such an awesome piece of work, very proud of this one: www.cell.com/cell-systems... #MicroSky

New in JB: Déraspe, Roy et al. perform a comparative genomics study of the PA7-clade of P. aeruginosa - now recognized as a distinct species, Pseudomonas paraeruginosa. This analysis revealed 2 sub-clades, the lack of T3SS & multiresistance.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

New in JB: Fung, Visick et al. show that a single SNP can impact biofilm formation and colonization of its squid host by V. fischeri.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

BiSP - MicrHub Fourwaves - BiSP - MicrHub

Plus que 10 jours avant la fin des soumissions des résumés pour le BiSP qui aura lieu le 5-6 novembre 2025 à l'Université de Sherbrooke. Nous aurons aussi la chance de recevoir @lalouxlab.bsky.social et @bjesseshapiro.bsky.social

Partagez! @micrhub.bsky.social

event.fourwaves.com/bispmicrhubs...

Professor or Associate professor (Tenure Track/Full) in Microbial Genetics of Health - Turun yliopisto - Työpaikat - Duunitori Avoin työpaikka: Professor or Associate professor (Tenure Track/Full) in Microbial Genetics of Health - Turun yliopisto, Turku. Duunitorilla lisäksi yli 30 000 muuta avointa työpaikkaa. Lue lisää nyt!

Professor (full) or Associate Professor (tenure track) in Microbial Genetics of Health (U. Turku Finland). Competitive starting package included! Please share.

duunitori.fi/tyopaikat/ty...

New in JB: DiMaggio, Yeo & Brinsmade show a link between nucleotide metabolism and the activity of the Sae two component regulatory system via SaeS kinase activity and membrane integrity in S. aureus
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

Please share - an Assist Prof position in microbiology

employmentopportunities.umb.edu/mob/cw/en-us...

@asm.org

View from the lab now. Did I mention that we are recruiting faculty microbiologists?

www.linkedin.com/posts/vaughn...

The 2025 Women 🌈 World Cycling Jersey belongs to Canada now! Congrats to Magdeleine Vallieres (from Sherbrooke!!) on your amazing win. And she will get to wear it at the 2026 World Championships in Montreal next year! #cycling #UCI #Kigali2025

Metabolic strategies that enable oral commensal persistence in a lower airway environment | mBio Chronic respiratory diseases such as bronchiectasis and cystic fibrosis are marked by persistent infection and inflammation, with oral bacteria increasingly recognized as active contributors. Among th...

"Metabolic strategies that enable oral commensal persistence in a lower airway environment" #microsky

journals.asm.org/doi/10.1128/...

Things I see in the lab that trainees put on their shelves, and that make me scratch my head. #microsky

Dynamics and interplay of gene expression and chromosome organization across a predatory lifecycle The obligate predatory bacterium Bdellovibrio bacteriovorus alternates between a motile attack phase and a growth phase inside another bacterium, during which it undergoes multiple rounds of DNA repli...

📝New preprint! #MicroSky

🕰️We chart the full, synchronized lifecycle of a predatory bacterium using Hi-C, RNA-seq, ChIP-seq & microscopy.

🧬We uncover dramatic shifts in nucleoid architecture & transcription, tightly coordinated with predation.

www.biorxiv.org/content/10.1...

New in JB: Banerjee, Chandler et al. link regulation of QS to the the nitrogen-related phosphotransferase system in P. aeruginosa, and thus virulence in this microbe.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

he Department of Plant Pathology at the University of California, Davis is seeking applications for a fulltime, tenure-track Assistant Professor position in Mycology, with a focus on plant pathogenic, symbiotic, or mycotoxigenic fungi and fungal-like organisms (e.g., oomycetes). We are looking for a highly motivated and creative scientist with a strong background in mycology and/or the biology of fungi and fungal-like organisms that interact with plants. The successful candidate will be expected to develop a world-class, externally funded research program that integrates both fundamental and applied aspects of fungal biology within the context of plant pathology. We welcome applicants pursuing a wide range of research topics related to plant-associated fungi, including but not limited to mechanisms of fungal pathogenesis or symbiosis with plants, population genomics and evolution of fungal plant pathogens, plant-associated fungal microbiomes and plant-microbe interactions, and/or one health approaches to fungal diseases and antifungal resistance. Applicants working in other relevant research areas involving pathogenic, symbiotic, or mycotoxigenic fungi or fungal-like organisms that affect plant health are also encouraged to apply. The successful candidate will have significant opportunities for collaboration with faculty in plant pathology, microbiology, genomics, and agricultural sciences, and to contribute to addressing issues of importance to California’s agricultural and natural ecosystems. The appointee primary teaching responsibilities will be teaching Introductory Mycology, an upperdivision lab class, and SAS 30, Mushroom, Molds & Society, a general education class for non-majors. Additional graduate and undergraduate teaching responsibilities may be assigned based on departmental needs and the candidate’s expertise. The department offers modern instructional facilities, including a newly renovated teaching laboratory.

Please repost -- The Univ. California Davis dept of Plant Pathology is hiring a Fungal biologist / Mycologist

Applications due Dec 1

Application portal: recruit.ucdavis.edu/JPF07339

Screenshot shows part of the job posting (with alt-text of the same text)

New in JB: Reasoner, Francis & Hadjifrangiskou discuss the urinary microbiome as a next frontier in microbial ecology, and discuss the future areas of study, and challenges, for the urobiome.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

JB is the first journal at ASM to launch the double-anonymized peer review (DAPR) track!
#JBacteriology

JB Editor's Choice: Richardson & Pascal do a deep dive into the many iterations of bacterial two-hybrid systems and their uses in bacteria - a must read for those looking at protein-protein interactions.
journals.asm.org/doi/10.1128/...
@asm.org #JBacteriology

Et nous aurons la chance d’avoir @lalouxlab.bsky.social et @bjesseshapiro.bsky.social comme conférenciers invités. Inscrivez-vous ! @micrhub.bsky.social

Rappel d’inscription et de soumission pour l’événement 2025:

⏳🕓 Plus que 3 semaines avant la fermeture des soumissions pour une présentation orale ou par affiche!

Nous avons hâte de vous y voir en grand nombre ☺️

Now out in @newphyt.bsky.social from @charlesrleveillee.bsky.social. We investigated the link between induction of chloroplastic ROS and the production of SA in defense and its suppression by effectors, as well as the importance of ABA in this phenomenon
nph.onlinelibrary.wiley.com/doi/10.1111/...