Dr Blanca Perez-Sepulveda

@blancaps.bsky.social

A tiny microbiologist working on big projects | iNTS | 10KSG | Phages | S. Panama | Hinton Lab | Chile | She/Her/Ella 🏳️‍🌈 views my own

Proud to be part of this incredible multidisciplinary team uncovering why some people are NOT infected by Salmonella. This new Wellcome Trust @wellcometrust.bsky.social funding will allow us to uncover why some people naturally resist infection and colonisation by Salmonella Typhimurium.

Institute of Infection, Veterinary and Ecological Sciences@livuni-ives.bsky.social · 9mo ago

NEWS | Professor @jayhinton.bsky.social and an international team have been awarded £4.56M Wellcome Discovery Award to investigate natural human resistance to Salmonella 🔗 bit.ly/4hujsRG @livuninews.bsky.social | #TeamLivUni

A news title card with a transparent image of salmonella bacteria against a navy blue background. The text reads '£4.56M Wellcome Discovery Award to investigate natural human resistance to Salmonella' in white.

Temporal analysis revealed that the four major clades all emerged in the late 1800s, coincident with European efforts to build the Panama canal (‘Panama Fever’ by ‪@matthewparker70.bsky.social‬ is recommended reading for those with an interest in the history here) 7/n

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We also found multidrug resistance cassettes; fluoroquinolone resistance (bumping S. Panama onto the WHO AMR priority pathogens list); and a single extensively drug-resistant isolate 6/n

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Although antimicrobial resistance (AMR) levels were low overall (14% of isolates), resistant isolates were predominately found in Clade 2 (European-associated) and Clade 4 (associated with Oceania and Asia) 5/n

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S. Panama causes major disease concerns, including high rates of iNTS in French Guiana, large outbreaks in European pork, AMR in Asia, and outbreaks in American soldiers from where the first (extant) isolate from 1931 came from (More in our 2019 review: 10.1128/IAI.00273-19) 2/n

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8/12 📦 Critically, RNA in stool remained stable enough for pathogen detection without preservatives (and after self-sample and surviving the mail service!), providing evidence for the routine potential of metatranscriptomics in clinical settings (with some work!)

5/12 🦠 Metatranscriptomics captured active Adenovirus F infections via broad transcriptome coverage (in a couple of samples, near complete!), despite it being a DNA virus, highlighting its use in profiling ongoing viral activity during diarrhoeal illness.

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4/12 🧪 Metatranscriptomics showed superior sensitivity, with strong correlation to conventional diagnostics for 6/15 pathogens and to Luminex for 8/14. 🧬 Metagenomics performed well for some targets but showed lower overall concordance.

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🔬 3/12 As a part of the INTEGRATE study, we sequenced stool from 1,067 patients using both metagenomics and metatranscriptomics. We identified pathogens in these data and benchmarked against routine diagnostics and Luminex xTAG GPP, a multiplex test for key bacterial, viral, and parasitic pathogens.

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2/12 💩 Diarrhoea affects ~18 million annually in the UK, yet traditional diagnostics often miss causes, especially hard-to-culture or emerging pathogens. Our work shows how next-generation sequencing can transform the detection and understanding of GI infections.

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And a huge thanks to @jessicamablair.bsky.social for inviting me to write this piece. We knew how important & timely such a piece was but little did we know that it would be even more important now more than ever. Let’s us all keep pushing for a more inclusive scientific community 🧑🏻‍🔬🧑🏼‍🔬🧑🏽‍🔬🧑🏾‍🔬🧑🏿‍🔬👨‍🔬👩‍🔬

Delighted to have to have contributed to this alongside excellent scientists! @emmabeansworth.bsky.social @blancaps.bsky.social. As a scientific community, it’s currently more important than ever to continue advocating for EDI. Please read our thoughts in the context of AMR (link in quoted post).

Emma Waters@emmabeansworth.bsky.social · last yr.

🚨New publication🚨 Thrilled to share our article about the Importance of Diversity & Representation in Science, now out in npj Antimicrobials & Resistance @springernature.com Huge thanks to my wonderful co-authors @blancaps.bsky.social & @edcoakes.bsky.social for their awesome support