Guillaume Méric

@gmeric.bsky.social

🇪🇺🇫🇷🇦🇺 (he/him) | www.mericlab.com Microbiome(s) and population health, host-microbe & pathogen genomics 🦠🧬 - Associate Professor (University of Bath); - Clinical affiliate (Baker Heart & Diabetes Institute)

Does the (live) shingles vaccine protect against dementia? Fergus Hamilton and colleagues provide important evidence in a new preprint using hospital data from the whole of England in a regression discontinuity design from which we *don't* show evidence of a meaningful protective effect /cont

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New reading list for July, before the summer break! ☀️ Some studies that caught my eye in the field of microbiome research, population health, microbial genomics, ecology, evolution and other topics. Comments my own. Hope this will be useful to some of you! mericlab.com/blog/2026-07/

Reading list: Intestinal nutrition, microbiome GWAS, GLP-1 & AI stuff

Some new articles in the reading list. I’ll probably do a little break for those during the summer holidays. Have a good one! (a) Microbiome and population health Genomic landscape of the human vagina...

mericlab.com

Wind turbine strikes are 2nd biggest mortality factor (21% of 53 birds where cause of death is known) after poisoning for WTEs in Ireland 🌎 On a windswept Norwegian island, one turbine blade was painted black, and the white tailed eagles stopped dying under the rotors share.google/9VX6cyF3z6vy...

On a windswept Norwegian island, one turbine blade was painted black, and the white tailed eagles stopped dying under the rotors

Dozens of wind turbines stand across its treeless ground, spinning day and night in the salt wind.

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What do single bacterial cells do when they run out of carbon source? If you missed the preprint, check out the official publication: doi.org/10.1038/s443... If the total bacterial population on earth stays roughly constant, then there must on average be as much death as replication. 1/n

E. coli prepares for starvation by dramatically remodeling its proteome in the first hours after loss of nutrients - Molecular Systems Biology

Although in the wild bacteria likely spend most of their time deprived of nutrients and slowly starving to death, very little is known about how bacteria adapt their phenotype to starvation. Here we combine microfluidics with quantitative fluorescence microscopy of transcriptional reporters to comprehensively quantify growth and gene expression at the single-cell level in E. coli during carbon starvation. We find that all cells immediately stop growing upon loss of carbon source and that almost all remain alive for over 30 hours. Furthermore, entry into starvation triggers a dynamic expression program that is remarkably homogeneous across single cells, but highly variable across genes, causing dramatic remodeling of the proteome early in starvation. We further show that, as protein production and the rate of protein degradation both decay approximately exponentially, protein concentrations become essentially ‘frozen’ after the first 5 to 10 hours, setting phenotypes for several days of starvation. Finally, using experiments in which gene expression is inhibited for different periods, we show that protein production in the first 5 hours is crucial for protecting cells from stresses late in starvation.

doi.org

The current Ebola case fatality risk isn’t 20%, despite many reporting this value (i.e. 136 deaths / 676 cases)... A decade ago, we highlighted how deaths are lagged outcome, so calculation that simply divides deaths to date by cases to date in ongoing Ebola outbreak will underestimate severity:

Case fatality rate for Ebola virus disease in west Africa

The case fatality rate (CFR) for the 2014 Ebola outbreak in west Africa has been widely reported to be much lower than for most previous outbreaks.1 However, this low rate is not necessarily a feature...

thelancet.com

Another microbiome GWAS on a body site other than the gut! After oral microbiota last January, this work is a new vaginal mGWAS using a ref catalog of >65k genomes (prok/euk/viral) -> host genetic association with 7 host loci above SWsig (strongest: OPRK1–Ureaplasma). www.nature.com/articles/s41...

Genomic landscape of the human vaginal microbiome is linked to host genetics and population of origin - Nature Genetics

Metagenomics, coupled with genome-wide association analyses, highlights population-specific patterns of variation within the vaginal microbiome and identifies host genetic loci associated with vaginal...

nature.com