Jesse Shapiro
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bjesseshapiro.bsky.social
Jesse Shapiro
@bjesseshapiro.bsky.social

Macrobe qui aime les microbes

http://www.shapirolab.ca/

Jesse M. Shapiro is an American economist who has served as the George Gund Professor of Economics and Business Administration at Harvard University since 2022. He was previously the George S. and Nancy B. Parker Professor of Economics at Brown University from 2015 to 2019, and the Eastman Professor of Political Economy at Brown from 2019 to 2021. He received a MacArthur Fellowship in 2021. .. more

Economics 40%
Political science 16%
Pinned
One of my favourite serendipitous results from the lab came about because we were long-read sequencing bacterial:

Vibrio cholerae, which is "supposed to" have TWO circular chromosomes (3 + 1 million base pairs) often has just ONE fused chromosome (4 Mbp).

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

(1/n)
Prevalent chromosome fusion in Vibrio cholerae O1 - Nature Communications
The pathogenic bacterium Vibrio cholerae typically has two circular chromosomes. Here, Cuénod et al. analyse 467 clinical isolates and identify several independent chromosome fusion events that are li...
www.nature.com

Reposted by Jesse M. Shapiro

Variations in annual dengue intensities are explained by temperature anomalies

Our new work led by Abbey Porzucek, @rafalpx.bsky.social, @colincarlson.bsky.social, Dan Weinberger to develop a method to compare relative dengue intensity between years and countries.

www.medrxiv.org/content/10.6...
Hey folks, am looking for examples of circularised/full plasmid sequences from "unusual " bacterial species, sequenced since 2020 (as independent validation for a plasmid identification tool that was trained on refseq2020+plsdb). Any tips? #microsky

All is forgiven

Sounds like someone is volunteering to review papers over the holidays - editors take note!

;)
maybe take advantage of those outside of the Americas/Europe that are still working ;)

Reposted by Jesse M. Shapiro

maybe take advantage of those outside of the Americas/Europe that are still working ;)

Reposted by Jesse M. Shapiro

Should the US adopt Denmark's vaccine schedule for children? @jakescottmd.bsky.social argues no in a piece that points out the risks such a move would pose for American kids. www.statnews.com/2025/12/19/d...
Why Denmark's vaccine schedule works for Denmark — but not for the United States
With its vaccine schedule, “Denmark has made a values choice to accept preventable hospitalizations and illnesses that other countries have chosen to prevent.”
www.statnews.com

Oh damn… fair point! (Clearly there is no satisfactory solution to this conundrum and we as a scientific community must keep debating into the new year… it’s the only way!!)

Reposted by Jesse M. Shapiro

'Go Habs Go' sneaks back into STM system via sly Hellmann's ad campaign montrealgazette.com/sports/hocke...

Is this a work app?! (I think so)

Preprint now, submit to journal in January
HAPPY HOLIDAYS TO ALL OF YOU!🎄✨

Ok now everybody’s getting on board
HAPPY HOLIDAYS TO ALL OF YOU!🎄✨

PSA:
For the life of me, why do people submit manuscripts now? My EIC inbox has rarely been fuller, and there's no way I'm sending these to Associate Editors until 2026.

Friends don't let friends submit in late December.
barack obama is sitting in a chair making a funny face and asking why tho ?
ALT: barack obama is sitting in a chair making a funny face and asking why tho ?
media.tenor.com

Reposted by Jesse M. Shapiro

For the life of me, why do people submit manuscripts now? My EIC inbox has rarely been fuller, and there's no way I'm sending these to Associate Editors until 2026.

Friends don't let friends submit in late December.
barack obama is sitting in a chair making a funny face and asking why tho ?
ALT: barack obama is sitting in a chair making a funny face and asking why tho ?
media.tenor.com
HAPPY HOLIDAYS TO ALL OF YOU!🎄✨

Skiing with me is mostly selfies then beer.

Reposted by Alan McNally

Anyone interested in discussing this opportunity to eat, drink, be merry and ski with me, my DMs are open!

(Oh yeah, and do some science to the tune of $1M/year x 8 years + $500k x 4 years)

Allow me to introduce Dr. Sana Naderi !

Her thesis brilliantly followed SARS-CoV-2 evolution (1) within hosts, (2) across animal species, and (3) into wastewater (not necessarily in that order...)

1) doi.org/10.1093/ve/v...
2) elifesciences.org/articles/83685
3) doi.org/10.1101/2025...

Reposted by Jesse M. Shapiro

So happy that this work simultaneously measuring the costs of antibiotic exposure and mistranslation is finally out in MBE! Work from @deepaagashe.bsky.social (who was ultra patient!) and my labs. Do see the research highlight here, with Nishant's lovely graphic. academic.oup.com/mbe/article/...
How Life's “Mistakes” Impact Adaptation
Even in a colony of genetically identical bacteria, no two individuals are exactly alike. This phenomenon, known as phenotypic “noise,” is a long-standing
academic.oup.com
Born #OnThisDay in 1922, Esther Lederberg was the first to isolate the lambda phage in 1951. She characterised the lysogenic phase, whereby the phage are able to integrate into the bacterial genome, staying dormant. This discovery made them a model tool of study, leading to many more breakthroughs.

Reposted by Jesse M. Shapiro

Getting rejected from a seminar where I was really hoping to present. In the later stages of grad school it's such a strange feeling, making you doubt everything you have done. Its almost making feel like I am not good enough and am not ready for the next career stages 🤷🏽‍♀️☹️

#gradlife #rejection

De novo genome sequence assembly of the model algal endosymbiont Micractinium conductrix derived from its host Paramecium bursaria 186b.

Guy Leonard, Irma Vitonyte, Fiona R Savory, Erika M Hansson, Duncan D Cameron, Michael Brockhurst, Thomas A Richards
bioRxiv doi: doi.org/10.64898/202...
De novo genome sequence assembly of the model algal endosymbiont Micractinium conductrix derived from its host Paramecium bursaria 186b
Endosymbiosis is a major driver of evolutionary innovation and underpins the function of diverse ecosystems. The origins and evolution of endosymbiosis are challenging to study experimentally due to t...
doi.org

Gene-specific selective sweeps for the win!

(Not that anyone is keeping score. Genome-wide sweeps and soft sweeps are also great)

Having followed this work for some time as a preprint (and even before that!) I’m so thrilled to see this out! Superb work, you two!
Grateful to share our paper on gene-specific selective sweeps in human gut microbiomes, now out in Nature! It has been a joy to work with @rwolff.bsky.social, whose insights and hard work made this possible.
www.nature.com/articles/s41...
Gene-specific selective sweeps are pervasive across human gut microbiomes - Nature
Development and application of the integrated linkage disequilibrium score (iLDS) reveals both selective pressures impacting the human gut microbiome and the mechanisms by which gut bacteria adapt to ...
www.nature.com
Have you ever wondered: just how strong *is* the evidence for Muller's ratchet on mtDNA?

Well, wonder no more!

(Project led by Yu Mo, with @smishra677.bsky.social and @yadirapga.bsky.social)

"No molecular evidence for Muller's ratchet in mitochondrial genomes"
www.biorxiv.org/content/10.6...
No molecular evidence for Muller's ratchet in mitochondrial genomes
Muller's ratchet predicts that non-recombining genomes can accumulate deleterious mutations, though molecular evidence for it is rare. Previous studies have tried to detect ratchet-like behavior in mi...
www.biorxiv.org

Reposted by Jesse M. Shapiro

My column on the death of Michael Whalen, who set the standard for sports broadcasting in this country – a standard that has slipped drastically since he retired.

montrealgazette.com/sports/hocke...
Obituary: Montreal sports broadcaster Michael Whalen was a master storyteller
Veteran journalist, who died last week at 82, covered Montreal's sports scene with aplomb for TSN from 1986 to 2007.
montrealgazette.com

Reposted by Jesse M. Shapiro

Yearly reminder that the world will not end if that new manuscript or revision sits on your desk for a couple more weeks, or you are realistic about decision times.

Editors & reviewers are people too, are getting swamped with work just about now, and will likely enjoy a well-deserved break soon
🧪
a cartoon drawing of minnie mouse talking on a phone
Alt: a cartoon drawing of minnie mouse working intensely
media.tenor.com
I've spent all day struggling to write a single page of a popular science article. I bang away at a word processor; give up; start diagramming on paper. Take some notes; draft a few sentences in pen; return to the computer...and very slowly I figure out what I was trying to say in the first place.
Just decline the peer review invitation.

What are you people even doing?
More than half of researchers now use AI for peer review — often against guidance
A survey of 1,600 academics found that more than 50% have used artificial-intelligence tools while peer reviewing manuscripts.
www.nature.com