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Posts by Aaron Weimann

Jobs Working with us

We have two paid internships available in our group starting this summer, suitable for master's / pre-PhD students:
- Protein structure search
- Promoter variation

For full details and how to apply see: www.bacpop.org/jobs/

3 weeks ago 12 16 0 1

Now published! 'Identification of transporter-dependent capsular loci associated with the invasive potential of Escherichia coli' www.nature.com/articles/s41... insights below.....

3 weeks ago 24 14 1 1
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Upcoming seminar:

๐ŸŽ“Professor Susanne HรคuรŸler, Head of Department of Molecular Bacteriology @helmholtzhzi.bsky.social

๐Ÿ“ขโ€˜Functional Genomics in the Opportunistic Pathogen Pseudomonas aeruginosaโ€™
๐Ÿ“… 4-5 PM, Thu 26 Mar
๐Ÿ“JCBC @cambridgebiocampus.bsky.social

buff.ly/9PtbIn8

#CITIID

1 month ago 4 3 1 0
menB outbreak in Kent -- initial thoughts A cluster of meningitis cases is currently dominating the UK news. At least five of the cases have been confirmed as serotype B (menB), from what I can tell the others have not yet been analysed. My P...

I did my PhD on bacterial meningitis, finding whether there are genetic factors which make meningitis more likely.

Wrote down some initial thoughts on the current outbreak in Kent: johnlees.me/posts/menb-o...

I tried to think of factors and their likelihood to explain why this is happening now

1 month ago 38 17 3 2
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The MicrobeAtlas database: Global trends and insights into Earthโ€™s microbial ecosystems Environmental DNA sequencing has revolutionized our understanding of microbial diversity and ecology. Microbiomes have now been sequenced across the eโ€ฆ

The Microbe Atlas database paper is *finally* published! Out in @cellpress.bsky.social today:

www.sciencedirect.com/science/arti...

1 month ago 21 7 3 0
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Bacterial defense systems and host ecology drive the evolution of intra-species lineages Staphylococcus aureus lineages vary widely in the frequency of gene exchange and the diversity of genome content. Gorzynski and Harling-Lee et al. show that both host ecology and the horizontal acquis...

Excited to share our latest paper c/w @jrpenades.bsky.social @jrossfitz.bsky.social et al! We found that S. aureus lineages have different pangenome structures driven by HGT, with horizontally-acquired defence systems (T1RM) being major drivers of lineage emergence ๐Ÿ‘‡
www.cell.com/cell-reports...

2 months ago 8 1 0 0
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Description Please note that job descriptions are not exhaustive, and you may be asked to take on additional duties that align with the key responsibilities ment...

Come join our team! Exciting opportunity for a clinical research fellow, ST1-ST7, to contribute to a novel Staphylococcus aureus human challenge model

Deadline: 23 Feb 2026
Post start: up to Sept 2026

www.imperial.ac.uk/jobs/search-...

2 months ago 2 1 1 6

Working on trans-eQTL mapping with population-scale scRNA-seq? Meet LIVI, our latest framework that enables efficient trans-eQTL mapping at single-cell resolution across cohorts of hundreds to thousands of donors.

Preprint: doi.org/10.64898/202...
Summary in the ๐Ÿงต below by @danaivagiaki.bsky.social

2 months ago 11 4 0 0
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Meta-analysis of the uncultured gut microbiome across 11,115 global metagenomes reveals a candidate signature of health Silva et al. perform a global analysis of over 11,000 gut microbiomes and reveal that uncultured bacteria are key markers of gut health. The uncultured genus CAG-170 is strongly linked to low gut dysb...

Excited to share the newest paper from our team, where we uncovered a potential role of the uncultured gut #microbiome in health: www.cell.com/cell-host-mi.... Out now in @cp-cellhostmicrobe.bsky.social @cellpress.bsky.social. With Ana C. da Silva, Jacob Lapkin, Qi Yin and Efrat Muller.

2 months ago 16 9 3 1
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๐ŸŽฅ Professor @andresfloto.bsky.social
on new funding from: @wellcometrust.bsky.social @gatesfoundation.bsky.social @novonordisk.bsky.social and how VPD-HLRI research is helping reshape antibiotic discovery in the fight against antimicrobial resistance.

Read more:
๐Ÿ”— bit.ly/4rJy6c2

2 months ago 9 4 0 1

How do bacterial pangenomes evolve, what controls their dynamics, why do they exist?
Fitting a mechanistic model to 450 species from allthebacteria.org suggesting fast vs slow gene exchange (i.e. amount of MGEs) is a major differentiating factor, correlated with phylogeny rather than lifestyle

2 months ago 71 32 1 0
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Hugging Face โ€“ The AI community building the future. Weโ€™re on a journey to advance and democratize artificial intelligence through open source and open science.

Super excited to announce the release of gene and intergenic region annotation from the largest bacterial genome and MAG datasets available, including AllTheBacteria, GTDB, SPIRE, HRGM, mOTUs and MGnify - dereplicated and available from HuggingFace huggingface.co/AllTheBacteria

2 months ago 16 13 2 0
Client Challenge

Our first lab paper is out.
Large-scale testing of antimicrobial lethality at single-cell resolution predicts mycobacterial infection outcomes.
From single cells to patients, across tuberculosis and M. abscessus.
๐Ÿ‘‰ doi.org/10.1038/s415...
๐Ÿ‘‡ Thread

3 months ago 18 7 1 1

Official Statement:
Cambridge University, Department of Veterinary Medicine, 12/12/2025

"The decision to recommend the closure of what the Times Higher Education Supplement ranks as the best undergraduate veterinary course in the world has come as a bolt from the blue."

[1]
#SaveTheVetSchool

4 months ago 1 4 1 1
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We're excited to release metaTraits.embl.de! ๐Ÿฆ  Interactively explore 140+ ๐—บ๐—ถ๐—ฐ๐—ฟ๐—ผ๐—ฏ๐—ถ๐—ฎ๐—น ๐—ฝ๐—ต๐—ฒ๐—ป๐—ผ๐˜๐˜†๐—ฝ๐—ถ๐—ฐ ๐˜๐—ฟ๐—ฎ๐—ถ๐˜๐˜€, harmonized & integrated from culture-derived collections ๐Ÿ”ฌ & genome-based predictions ๐Ÿงฌ for >2M MAGs & genomes.

Publication at NAR: doi.org/10.1093/nar/... @narjournal.bsky.social #microsky ๐Ÿงต 1/8

4 months ago 38 29 1 0
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High frequency body site translocation of nosocomial Pseudomonas aeruginosa - Nature Communications Here, the authors report within-host diversity and body site translocation dynamics in hospital samples of Pseudomonas aeruginosa and reveal that body site sharing was likely due to within-patient tra...

Really pleased to share the first paper to come out of the lab.
We found that hospital patients were frequently colonised with P. aeruginosa and that the same clone was shared between the gut and the lung.
The phylogenies indicate that the clones moved from lung->gut

www.nature.com/articles/s41...

4 months ago 64 33 2 4

Great to share the latest work from our group and collaborators. First CARRIAGE study paper led by @drdaggarwal.bsky.social and the heroic efforts of Katie Bellis and Beth Blane in the lab plus all the team at @cambridge-ceu.bsky.social Huge thanks goes to the 22,000 participants of the study

4 months ago 10 11 1 0
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Bacteria can control what enters their cells, balancing energy and blocking antibiotics.

New study in @natmicrobiol.nature.com uncovers this hidden mechanism of drug resistance: buff.ly/s3YIwyK

@andresfloto.bsky.social @vpd-hlri.bsky.social @unibas.ch

4 months ago 11 7 1 0

Happy to share our new AMR resource which has phenotypic AMR (usually MIC data) collected from publications and databases. This is paired with assemblies and annotations

We're excited for users who might train new models, find phenotype/genotype mismatches, or any other use

5 months ago 62 36 1 0
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Assembly, architecture and functional roles of microbial surface layers - Nature Reviews Microbiology Surface layers (S-layers) are ubiquitous protein assemblies that coat prokaryotic cells, with their functional roles increasingly coming into focus. In this Review, Isbilir and colleagues discuss rece...

Assembly, architecture and functional roles of microbial surface layers

Review article published in @natrevmicro.nature.com with @bupbuse.bsky.social, Andriko von Kรผgelgen and @vikramalva.bsky.social.

S-layers are everywhere!

www.nature.com/articles/s41...

5 months ago 87 32 3 6
Pangenome graphs as a new paradigm in comparative genomics - Pangenome graphs as a new paradigm in comparative genomics -

If you're interested in using pangenome graphs for comparative genomics, check out my webinar, part of EMBL-EBI's "Concepts, methods, and resources in pangenomics" series, available on-demand: www.ebi.ac.uk/training/eve...

5 months ago 17 10 1 0
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Metalog: curated and harmonised contextual data for global metagenomics samples Abstract. Metagenomic sequencing enables the in-depth study of microbes and their functions in humans, animals, and the environment. While sequencing data

Great to see this finally published!

Metalog: curated and harmonised contextual data for global metagenomics samples

now out in @narjournal.bsky.social

academic.oup.com/nar/advance-...

5 months ago 57 38 1 2
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BIOMICS hackathon at EMBL-EBI Hackathon held in Hinxton 2026

We are running a hackathon at EBI in Feb: biomics.bacpop.org

If you are at EMBL, ETH Zurich, GRC or GIMM working on a biological problem in data science or programming, consider putting a project forwards!

6 months ago 5 4 0 0
home

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

6 months ago 4 2 0 0

๐Ÿš€ As first official act, we are hiring! ๐ŸŽ“
Weโ€™re looking for a PhD student to work at the interface of computational biophysics, machine learning & human mutations. ๐Ÿ“Œ FPI fellowship, 4 years fully funded!

More information here:
www.bsc.es/join-us/job-...

6 months ago 16 9 2 0
GitHub - bacpop/ggCaller: Bifrost graph gene caller. Bifrost graph gene caller. Contribute to bacpop/ggCaller development by creating an account on GitHub.

A new ggCaller version is out! v1.4 includes tweaks to improve efficiency, outputs Panaroo-friendly GFFs, and enables iterative gene calling; if you have already called a gene set, you can now add more genomes either one by one or in batches github.com/bacpop/ggCal...

6 months ago 11 7 1 0
EMBL International PhD Programme โ€“ Unique in the world and waiting for you!

The EMBL PhD programme is open until 13th October (entry ~Sep 2026):
www.embl.org/about/info/e...

We have three positions in microbial genomics at EMBL-EBI, including one in my group. Please do apply, or if you know anyone that would be interested pass on to them

7 months ago 19 39 1 3
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Fast and accurate variant identification tool for sequencing-based studies - BMC Biology Background Accurate identification of genetic variants, such as point mutations and insertions/deletions (indels), is crucial for various genetic studies into epidemic tracking, population genetics, a...

QuickVariants ๐Ÿฆ ๐Ÿงฌ๐Ÿงช- a genetic variant identification tool developed for microbes, now on Bioconda! ๐Ÿš€
โ€ข 9ร— faster median speed vs bcftools
โ€ข Higher accuracy for both SNPs & indels
bioconda.github.io/recipes/quic...
bmcbiol.biomedcentral.com/articles/10....
#microsky #microbiomesky

7 months ago 15 5 0 0
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Mathematical modelling for biologists - Modelling concepts in biological research Mathematical modelling for biologists - Modelling concepts in biological research

My PhD student @leonielorenz.bsky.social (with Eva Geissen) has made this nice (free) online course to introduce mathematical modelling for biology:
www.ebi.ac.uk/training/onl...

Including both molecular and epidemiological examples

8 months ago 114 57 6 3
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A scalable gut epithelial organoid model reveals the genome-wide colonization landscape of a human-adapted pathogen Nature Genetics - A genome-wide screen using human gut epithelial organoids combined with transposon-directed insertion sequencing identifies over 100 Shigella flexneri genes required for...

Thrilled to share our work is finally out at @natgenet.nature.com ! rdcu.be/eqGgf
Combining a scalable human gut organoid model with TraDIS and statistical modeling, we mapped how Shigella colonizes the intestine at genome-wide resolution.

10 months ago 12 4 2 1