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Karine Dufresne

@vagstaph.bsky.social
194 followers 252 following 12 posts

Microbiologist, interested in pathogen-host-microbiota interactions #Women'sHealth

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Reposted by Karine Dufresne
George O'Toole (he/him/his) @geiselbiofilm.bsky.social · 30/09/2025
Please share - an Assist Prof position in microbiology employmentopportunities.umb.edu/mob/cw/en-us... @asm.org
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Karine Dufresne @vagstaph.bsky.social · 09/09/2025
Glad to see this one ready! Great work from Carla Maduta following up on how S. aureus respond to pH in the vaginal tract. Check it out: www.biorxiv.org/content/10.1...
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Reposted by Karine Dufresne
Andreas Peschel @andreaspeschel.bsky.social · 23/08/2025
"What makes S. aureus such a difficult vaccination candidate?" Here are some answers:
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Karine Dufresne @vagstaph.bsky.social · 15/05/2025
If you are interested in bacterial pathogens acting on the vaginal tract, look out for this opportunity at JoVE. We are now accepting abstracts for methods articles on the field🧫: app.jove.com/methods-coll...
app.jove.com
JoVE | Peer Reviewed Scientific Video Journal - Methods and Protocols
Jove
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Reposted by Karine Dufresne
Cinq à Science @cinqascience.bsky.social · 05/04/2025
Notez votre calendrier pour le prochain #CinqaScience par @vagstaph.bsky.social de @uqam.ca sur le microbiote vaginal! #quebec #science #microbiology #science #microbiome #health #sante #microbiote #microbiote #sciencecommunication #vulgarisationscientifique tinyurl.com/49rz55rn
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Reposted by Karine Dufresne
Alain Paquette @alainpaquette.bsky.social · 20/03/2025
Nature paper alert for #IDENT!! 👀 We show that tree seedlings don't behave as expected from theory, with possible impacts for restauration efforts. 223 trees species in 160 experiments across the world @paqlab.bsky.social @biologieuqam.bsky.social @sciences.uqam.ca #CEF
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Karine Dufresne @vagstaph.bsky.social · 03/03/2025
Venez voir cette prochaine conférence à La Brassée! #cinqascience 🦠
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Karine Dufresne @vagstaph.bsky.social · 03/03/2025
First publication from my lab @biologieuqam.bsky.social . Here is my short review about lipid signatures in the women's vaginas and implication on the microbiota and pathogens: lipidworld.biomedcentral.com/articles/10....
lipidworld.biomedcentral.com
Fatty acid composition in the vaginal tract of cis-gender women: canary in coal mines for reproductive health? - Lipids in Health and Disease
The vaginal tract of cis-gender women of reproductive age is inhabited by communities of bacteria generally dominated by one of four Lactobacillus species. These bacteria are important for the reprodu...
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Reposted by Karine Dufresne
Aleeza Gerstein @acgerstein.bsky.social · 04/02/2025
🇨🇦Job alert🇨🇦 Three tenure track positions in Biological Science at UManitoba, 2 on aquatic organisms, 1 in synthetic biology/biochem. Ask me anything about living and working in #Winnipeg -it’s pretty good here! (And in 2025, “pretty good” is actually great imho)! universityaffairs.ca/jobs/job-pre...
universityaffairs.ca
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Karine Dufresne @vagstaph.bsky.social · 02/02/2025
Gens de Montréal, venez assister à cette conférence de Sébastien Zappa dans une ambiance festive. #5ascience
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Karine Dufresne @vagstaph.bsky.social · 29/01/2025
Just another one for 2025 👩‍🔬 Great work with @stephentuffs.bsky.social and Nick Walton from @superantigens.bsky.social lab. Here is our last study focusing on the impact of superantigens within 3 S. aureus isolates from the same bacteremia patient: doi.org/10.1128/iai....
doi.org
Evidence that staphylococcal superantigens promote within-patient bacterial persistence following post-operative surgical site infection | Infection and Immunity
In this study, we investigated bacterial isolates from a patient who experienced three recurrent S. aureus infections over a 4 month period following total knee arthroplasty. Genomic and phenotypic characterization of these isolates revealed that they all ...
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Karine Dufresne @vagstaph.bsky.social · 22/01/2025
Here's my latest research article: the impact of TSST-1 in the vagina beyond menstrual toxic shock syndrome. doi.org/10.1128/iai....
doi.org
TSST-1 promotes colonization of Staphylococcus aureus within the vaginal tract by activation of CD8+ T cells | Infection and Immunity
Toxic shock syndrome toxin-1 (TSST-1) is a superantigen toxin produced from Staphylococcus aureus that causes the menstrual form of toxic shock syndrome. This research demonstrates that TSST-1 also ha...
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Reposted by Karine Dufresne
hjillianh @hjillianh.bsky.social · 22/01/2025
Do you have a period? Do you live in the continental US? Then do I have a study for you - please join VAMPP and help expand our understanding of the vaginal microbiome! Scan the QR code on the bottom left to see if you're eligible and learn more
A pink flyer with a darker outline of a uterus and fallopian tubes that says "We need your help investigating menstrual product use and the vaginal microbiome."
Why: Researchers from Duke University are conducting a study investigating if menstrual products advertised as scented or for odor control affect the vaginal microbiome compared to unscented menstrual products.
How: If you agree to participate you will be asked to: (each of the bullet points is shaped like a tampon)
Self-collect vaginal swabs during 4 menstrual cycles for microbiome assessment.
Complete a short questionnaire each cycle.
Complete a demographic and short health history questionnaire.
Use study-provided menstrual products during 2 menstrual cycles
(one cycle you will use scented/odor control products and one cycle you will use unscented products).
Who: Up to 50 of individuals aged 18-40 years who have regular menstrual cycles (approximately every 4 weeks) that last at least 3 days, can safely use tampons, do not have allergies/hypersensitivity to fragrances, are not or do not plan to become pregnant over the study period will take part in this study, and have not given birth in the past 12 months.
Compensation for your time will be provided.

There's a drop of blood with a QR code on it where you can learn more - I'll post that separately!
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Karine Dufresne @vagstaph.bsky.social · 28/02/2024
Great to see this one out as a preprint! We screened a library of small molecules agir inhibition of TSST-1 in prevention of mTSS. Check it out! Out of @superantigens.bsky.social lab
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Karine Dufresne @vagstaph.bsky.social · 15/01/2024
It’s amazing to see this review out! Collaborations from few members of @superantigens.bsky.social lab to summarize the last insights on superantigens and their interactions with T lymphocytes. www.nature.com/articles/s41...
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Karine Dufresne @vagstaph.bsky.social · 04/01/2024
My first review as a corresponding author is out today, come read about S. aureus and it’s impact in the vagina #trendsinmicrobiology #womenshealth www.sciencedirect.com/science/arti...
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Reposted by Karine Dufresne
bioRxiv Microbiology @biorxiv-microbiol.bsky.social · 31/12/2023
Vaginal Lactobacillus fatty acid response mechanisms reveal a novel strategy for bacterial vaginosis treatment www.biorxiv.org/content/10.1101/202…
biorxiv.org
Vaginal Lactobacillus fatty acid response mechanisms reveal a novel strategy for bacterial vaginosis treatment https://www.biorxiv.org/content/10.1101/2023.12.30.573720v1
Bacterial vaginosis (BV), a common syndrome characterized by Lactobacillus-deficient vaginal microbi
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Reposted by Karine Dufresne
Victor J. Torres @torreslab.bsky.social · 27/12/2023
Job Alert! We are looking for a Principal Bioinformatics Research Scientist with extensive experience in large-scale microbial genomics to create and direct our new Microbial Computational Genomics and Bioinformatics Lab @StJudeResearch stjude.wd1.myworkdayjobs.com/stjude/job/M...
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Karine Dufresne @vagstaph.bsky.social · 07/09/2023
Hi BlueSky, finally join the community and looking forward to hear from scientists on this platform: I'm a microbiologist interested in host/pathogen/microbiota interactions especially in the vaginal tract.
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