Guillaume Méric
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gmeric.bsky.social
Guillaume Méric
@gmeric.bsky.social
🇪🇺 🇫🇷 🇦🇺 in 🇬🇧 (he/him) | www.mericlab.com
Human microbiome(s), pathogen ecology & host-microbe genomics
Associate Professor @uniofbath.bsky.social
Clinical Affiliate @bakerresearchau.bsky.social @cambridgebaker.bsky.social
📍Bath, UK
Pinned
New PhD position in my lab at @uniofbath.bsky.social (with both @tweethinking.bsky.social & Dr Bethan Littleford-Colquhoun)!
We're looking for someone keen on bioinformatics and microbiome evolution.
Important info below on eligibility & URSA competition funding👇
www.findaphd.com/phds/project...
The overlapping microbiome: ecology, function and resilience beyond species boundaries at University of Bath on FindAPhD.com
PhD Project - The overlapping microbiome: ecology, function and resilience beyond species boundaries at University of Bath, listed on FindAPhD.com
www.findaphd.com
Reposted by Guillaume Méric
🎉 Congratulations to @pcapi.bsky.social and @alice-risely.bsky.social, the winners of the 2025 JAB review award for the best mini-review by early career researchers! 🏆

Winning article: vist.ly/4iq5m

#ornithology #birds #award #review #microbiome #migration
December 16, 2025 at 12:28 PM
Reposted by Guillaume Méric
"Higher intake of high-fat cheese and high-fat cream was associated with a lower risk of all-cause dementia."
Results of a 25-year prospective study of ~27,000 participants.
The purported benefit was not linked to APOE4 carriers or low-fat cheese intake
www.neurology.org/doi/full/10....
December 17, 2025 at 10:05 PM
Reposted by Guillaume Méric
Flu is surging. What can we do about it?

Layered protections—vaccination, isolation with liveable sick pay, and clean air—enabled by government and institutions.

BMJ Opinion by Stephen Reicher, @martinmckee.bsky.social & @profstevegriffin.bsky.social
www.bmj.com/content/391/...
Vaccinate, isolate, ventilate: will we finally learn the lessons from covid this flu season?
With flu surging again, Stephen Reicher and colleagues draw on the experience of covid-19 to argue that predictable winter pressures demand more than individual responsibility, they also require syste...
www.bmj.com
December 16, 2025 at 12:17 PM
Reposted by Guillaume Méric
Absolutely stoked to have this published in @plosbiology.org

We looked at the metabolism of #Klebsiella pneumoniae 🦠🧫. We not only demonstrated lineage-specific #metabolism, but that lineages can cross-feed and support each other.

journals.plos.org/plosbiology/...

#MicroSky #microbiology 🧬 🧪 💊
A metabolic atlas of the Klebsiella pneumoniae species complex reveals lineage-specific metabolism and capacity for intra-species co-operation
Why are there so many co-circulating Klebsiella pneumoniae clones? Using genomics and large-scale metabolic modelling of >7000 isolates, this study identifies structured, clone-specific metabolic spec...
journals.plos.org
December 13, 2025 at 9:46 AM
Reposted by Guillaume Méric
Huge preprint if you are interested in bacterial strain taxonomy! The why and how of cgMLST LIN codes: An extensively revised and expanded version doi.org/10.1101/2024... I will summarize it for you in this thread 👇
Life Identification Numbers: A bacterial strain nomenclature approach
Unified strain taxonomies are needed for the epidemiological surveillance of bacterial pathogens and international communication in microbiological research. Core genome multilocus sequence typing (cg...
doi.org
November 30, 2025 at 7:51 PM
Very interesting analysis from @bananabenana.bsky.social et al. on blaIMP dissemination from >4.5k genomes from strains of 93 species isolated over 20 years.
www.nature.com/articles/s41...
The rise and global spread of IMP carbapenemases (1996-2023): a genomic epidemiology study - Nature Communications
Carbapenemase blaIMP genes between 1996-2023 were analysed across 4,556 genomes, revealing variant-specific epidemiologies and endemicities. Horizontal gene transfer enabled broad inter-species transm...
www.nature.com
December 12, 2025 at 5:49 PM
Reposted by Guillaume Méric
The scikit-bio paper in online in Nature Methods! Many thanks to our collaborators, community contributors and reviewers! We couldn’t have done it without you. www.nature.com/articles/s41... #Bioinformatics #OpenSource
Scikit-bio: a fundamental Python library for biological omic data analysis - Nature Methods
Nature Methods - Scikit-bio: a fundamental Python library for biological omic data analysis
www.nature.com
December 11, 2025 at 5:57 PM
Reposted by Guillaume Méric
The GTDB website now has an ANI calculator based on skani that supports uploading of user genomes. Try it at gtdb.ecogenomic.org/tools/skani.

Find more information about @jimshaw.bsky.social fantastic tool at www.nature.com/articles/s41....
GTDB - skani calculator
An interface to compute pairwise ANI of NCBI genomes using the GTDB taxonomy.
gtdb.ecogenomic.org
December 11, 2025 at 2:59 PM
When humans shifted from harvesting natural wildfires to making fire is unclear because natural vs anthropogenic burning are hard to distinguish in the record. Here, "clever methods" beyond my understanding suggest early humans were making fire with pyrite ~400ky ago🔥
www.nature.com/articles/s41...
Earliest evidence of making fire - Nature
Baked sediment, heat-shattered artefacts and introduced pyrite in a 400,000-year-old Palaeolithic occupation site in Suffolk, UK provide evidence of intentional fire-making, marking a pivotal moment i...
www.nature.com
December 10, 2025 at 8:46 PM
Reposted by Guillaume Méric
It’s officially happening folks! The Microbial Population Biology Gordon Research Conference is back in Andover, New Hampshire starting June 27th of 2027!
See you there!!

@wcratcliff.bsky.social @ksbakes.bsky.social @surtlab.bsky.social

#microsky #mevosky
December 10, 2025 at 2:35 PM
Reposted by Guillaume Méric
Whoop whoop! 🎉 @hannahtriv.bsky.social’s first-author paper is officially out as a preprint!

Some super interesting long-read metagenomics results - especially the dominance of MDR Enterococcus faecium in very sick liver patients.

Huge shout-out to the whole team and fab collaborators!
December 10, 2025 at 2:16 PM
Impressive work on microbiota vs. HAI and great thread from first author @mfenk.bsky.social
Is the human microbiome a source for hospital-associated infections (HAI) and are any genetic changes associated with HAI? In our new preprint, we longitudinally reconstruct the evolutionary processes within the human microbiome leading up to HAI: doi.org/10.1101/2025...
Colonization, translocation, and evolution of opportunistic pathogens during hospital-associated infections
Many commensal bacteria that peacefully reside in the human microbiome are also able to cause acute opportunistic infections. Emerging evidence suggests that within-host evolution contributes to infec...
doi.org
December 10, 2025 at 10:31 AM
Reposted by Guillaume Méric
From @jhcepas.bsky.social and colleagues in the @narjournal.bsky.social #NARDatabaseIssue | eggNOG v7: phylogeny-based orthology predictions and functional annotations | #Bioinformatics #ProteinCentric #Database #OpenScience 🧬 🖥️🧪🇨🇭🇪🇸🇩🇪🔓
⬇️
academic.oup.com/nar/advance-...
eggNOG v7: phylogeny-based orthology predictions and functional annotations
Abstract. The eggNOG (evolutionary genealogy of genes: Non-supervised Orthologous Groups) database is a phylogenomic resource for orthology inference, evol
academic.oup.com
December 9, 2025 at 1:39 PM
Reposted by Guillaume Méric
lol professor of ethics in unethical behaviour shock.
December 9, 2025 at 4:02 PM
Reposted by Guillaume Méric
A major advance in cancer using multimodal AI to do virtual proteomics of H&E slides, unraveling the tumor microenvironment, key proteins, biomarkers, and informing prognosis
@cellcellpress.bsky.social @hoifungpoon.bsky.social
@msftresearch.bsky.social

cell.com/cell/fulltex...
Multimodal AI generates virtual population for tumor microenvironment modeling
GigaTIME leverages multimodal AI to generate virtual multiplex immunofluorescence (mIF) profiles from standard H&E slides, enabling comprehensive tumor immune microenvironment modeling across a large ...
cell.com
December 9, 2025 at 4:41 PM
Reposted by Guillaume Méric
Interested in applying for a postdoc on wildlife #microbiomes in my lab at Uppsala University, Sweden?

The local Birgitta Sintring Foundation gives out generous 2-year postdoc scholarships to early-career researchers who apply with a PI at the department. Deadline Feb 9.

www.uu.se/en/departmen...
The Birgitta Sintring Foundation – Department of Ecology and Genetics – Uppsala University
www.uu.se
December 9, 2025 at 12:38 PM
Pretty cool! Engineered periplasmic binding proteins+fluorophore sensors (for sugars+AAs) are used to report real-time extracellular metabolite dynamics in E. coli + many others species after 24h in plate readers, showing hierarchical substrate use.
journals.asm.org/doi/full/10....
Real-time simultaneous monitoring of multiple analytes in bacterial cultures | Applied and Environmental Microbiology
Real-time monitoring of metabolites in bacterial cultures is crucial for advancing our understanding of microbial physiology, metabolic fluxes, and dynamic responses to environmental changes. This capability enables researchers to capture transient metabolic states that are often missed in endpoint measurements. The use of engineered periplasmic binding proteins as biosensors for this real-time metabolite monitoring represents a groundbreaking approach. By leveraging the natural specificity and high affinity of PBPs for small molecules, these biosensors can be engineered to detect a wide range of metabolites with exceptional sensitivity and temporal resolution. The integration of PBP-based biosensors into microbial research not only enhances our ability to study real-time metabolism but also provides a versatile tool for optimizing industrial bioprocesses and exploring bacterial infections and complex microbial ecosystems
journals.asm.org
December 8, 2025 at 3:37 PM
Gut microbes can synthesize essential amino acids (EAAs), but how much these actually contribute to host EAA pools is unclear. Here, authors find no detectable microbial EAA across all organs examined, after analysing marked δ¹³C-EAA given to GF/conventionalized mice.
www.nature.com/articles/s42...
Assessing gut microbial provisioning of essential amino acids to host in a mouse model with reconstituted gut microbiomes - Communications Biology
Stable carbon isotope analysis of mouse organs reveals no evidence for gut microbial essential amino acid provisioning after microbiome reconstitution as demonstrated by the nearly identical isotope p...
www.nature.com
December 8, 2025 at 3:30 PM
Couldn't see figures in this version but text was interesting. Analysing HGT in MAGs from 338 Lifelines-DEEP adults identifies >5k recent HGT events in 116 gut microbial species.
Seems to be an interesting mobile resistome dynamics linked to age and PPI use too!
www.nature.com/articles/s41...
Longitudinal gut microbiota tracking reveals the dynamics of horizontal gene transfer - Nature Communications
Here, via longitudinal metagenomic analysis of 676 fecal samples from 338 individuals in the Lifelines-DEEP study, the authors identify ongoing gene-sharing among human gut bacteria that supports comm...
www.nature.com
December 8, 2025 at 11:43 AM
Reposted by Guillaume Méric
Amazing dataset describing the metabolic profiles of 66 E. coli transporter knockouts by @sulheim.bsky.social with Peter Doubleday and @nzamboni.bsky.social. The tool, set up by @lambdapp.bsky.social and Eric Ulrich allows you to explore for yourself. Enjoy! Pre-print here: doi.org/10.1101/2025...
December 3, 2025 at 1:11 PM
Reposted by Guillaume Méric
💾 ABRicate 1.2.0 has been released!

This 'oversight' lasted 6 years, but with help from @finlaym.bsky.social we got CI working and updated all the databases. #bioconda #conda #bioinformatics #microbiology #genomics

github.com/tseemann/abr...
Releases · tseemann/abricate
:mag_right: :pill: Mass screening of contigs for antimicrobial and virulence genes - tseemann/abricate
github.com
December 5, 2025 at 11:27 PM
Microbiota from 195 healthy breastfeeding mother-infant pairs identifies shared strains and ARGs between mother’s milk and infant stool, involving commensals (B. longum, B. bifidum) but also pathobionts like Klebsiella
www.nature.com/articles/s41...
Assembly of the infant gut microbiome and resistome are linked to bacterial strains in mother’s milk - Nature Communications
Here, with metagenomic analyses on longitudinal samples collected from 195 mother-infant pairs, the authors show that the breast milk microbiome contributes to infant gut assembly through bacterial st...
www.nature.com
December 6, 2025 at 12:10 AM
Reposted by Guillaume Méric
New PhD position in my lab at @uniofbath.bsky.social (with both @tweethinking.bsky.social & Dr Bethan Littleford-Colquhoun)!
We're looking for someone keen on bioinformatics and microbiome evolution.
Important info below on eligibility & URSA competition funding👇
www.findaphd.com/phds/project...
The overlapping microbiome: ecology, function and resilience beyond species boundaries at University of Bath on FindAPhD.com
PhD Project - The overlapping microbiome: ecology, function and resilience beyond species boundaries at University of Bath, listed on FindAPhD.com
www.findaphd.com
November 12, 2025 at 1:20 PM