#LISSSD25
I said no more #LISSSD25 posts but forgot a major highlight!

Most sessions started w/ a patient lived experience video, and you can see them all @ lisssd2025.org/patient-stories

Looking after patients during thier illnesses is v. stressful so it's great to hear their experiences when recovered.
Patient Stories — LISSSD 2025
www.lisssd2025.org
June 5, 2025 at 7:33 AM
Prof M Good & A/Prof M Pandey close #LISSSD25 thanking all the local committee, scientific advisory committee (led by Dr
T Lamagni & @joshosowicki.bsky.social), presenters, and delegates.

Prof A Steer announces #LISSSD28 is to be held in
📌 Limassol, Cyprus 🇨🇾 2028
June 5, 2025 at 4:20 AM
Last of the #LISSSD25 presentations is Prof Victor Nizet imploring the community to think like streptococci in these times of authoritarianism USA anti-science

🍇 Evade host immunity (cont to do work)
🍇 Form biofilms (network)
🍇 Colonise diverse hosts (expand skill sets)

#strep #idsky
June 5, 2025 at 4:04 AM
Prof M Voysey presents some prelim results of a prospective GBS infect. cohort

🧮 101 early & 67 late iGBS vs 286 GBS colonised but not infected ctrl
🚼 Birth weight of late < early < ctrl
3️⃣ Serotype III most common, esp in late onset dis.

#LISSSD25 #gbs #clinmicro
June 5, 2025 at 3:53 AM
Dr K Gibney flys the flag for 🦘 clin trials by 🎺

ISAAC 🔎 at Abx prophylaxis of close iGAS contacts (enrolling soon)

STRAP 🔎 backbone Abx, adjunctive Abx, and IVIg (enrolling 2026ish)

Only enrolling in Aus for now but looking for int. collab.

#LISSSD25 #idsky #clinicaltrials #strep
June 5, 2025 at 1:24 AM
Dr O Xie has an entertaining talk on S. dys subsp eq [SDSE]

🐴 iSDSE has similar incidence and mortality v iGAS
🐎 Less genomic clustering in SDSE
🫏 Global dissemination iSDSE driven by stG62647-lineage

#LISSSD25 #clinmicro #idsky
June 5, 2025 at 12:59 AM
PhD cand. J Iwasaki talks about mechanism behind strep throat recurrence.
👅 ~15% strep throat relapse
👅 Relapse strains can persist in ⬆️ [pen]
👅 Intracellular persistence in strep intracell. comm. [SIC]
👅 SICs are L-switch'd to lack cell wall hence recur post Pen Rx

#LISSSD25 #clinmicro
June 4, 2025 at 5:47 AM
It’s my great pleasure to present the Global Pneumoocccal Sequencing project at #LISSSD25

I feel humbled to learn more about Group A and Group B streptococci and other species, and meet great minds to discuss science.

#GPS_project
June 4, 2025 at 4:11 AM
Another AUROC: L Carlton presents a possible ARF biomarker id'd from a series of bead array exp using START cohort samples.

Most accurate candidate TRAFIP with AUROC 0.79 solo or upto 0.845 in combo w/ other biomarkers.

Coming to a revised-revised Jones criteria? #LISSSD25 #idsky
June 4, 2025 at 3:13 AM
Dr C Menendez presents cool data 🔍 for a neural auto Ab in PANDAS / Syd. chorea.

🧠 Prev work id'd auto abs to neural dopamine receptors (anti-D1R & D2R)
🧠 Accessed 4x PANDAS/SC cohorts to validate
🧠 Good AUROC in all cohorts & better in pred. movement disorder

#LISSSD25 #idsky
June 4, 2025 at 2:55 AM
Dr Dorota Jamrozy presents a well-powered GWAS to identify genetic features associated with invasive #GBS disease as compared with carriage at #LISSSD25

Thanks to the >20,000 GBS genomes in the #JUNO_project funded by @gatesfoundation.bsky.social
June 4, 2025 at 2:11 AM
Prof N Ketheesan outlines his labs use of the Lewis rat model to explore RHD/ARF.
🐀 rM5 protein induces carditis & myocarditis, PR sensitive test
🐀 Sera & Tcells transfused to nin-exposed replicate disease.
🐀 Repeated exposures result in RHD phenotype w/ varied ab response.

#LISSSD25
June 4, 2025 at 1:17 AM
Prof N Moreland from NZ speaks through the ARF perturbed immune response in ARF.
🌍 All strep A serotypes assoc w/ ARF in NZ
🌍 Increased IgG3 ab phenotpes
🌍 Immune infiltration valves incl plasma cells.
🌍 DIifferences in immue activation in acute & chronic RHD

#LISSSD25
June 4, 2025 at 1:09 AM
The first author Dr Akuzike Kalizang'oma presented this yesterday in the poster sessions at #LISSSD25. Interesting data! I wasn't so sure of the hypothesized link between the MDA and reduced vaccine efficacy but a pretty interesting story.
June 3, 2025 at 9:57 AM
Dr J Hart & team on validating clinical decision rules for strep throat:

🌹 Fiji rule (sore throat & neither coryza or hoarseness) is no better than chance.
🚫 No other algorithm tested is any better!

Underscores urgent need for POC diagnostics in these settings.

#LISSSD25 #idsky
June 3, 2025 at 3:12 AM
@earmitage.bsky.social leverages the SpyCATS platform to investigate WASH facilities on Strep A infection incidence

⬇️ w/ handwashing, freq. clothes changing, good wound care, access to soap.

Limited by no wealth data & small sub-group but options for interventions identified.

#LISSSD25
June 3, 2025 at 3:02 AM
Dr K Doran presents interactions between C alb & GBS in the vaginal tract w/ some nifty models and clinical datasets

🦠 GBS & C alb increased in vaginal dysbiosis
🦠 C alb forms biofilm & GBS colonises
🦠 In the biofilm GBS is more antibiotic resistant & virulent (CovR)

#LISSSD25 #clinmicro
June 3, 2025 at 1:53 AM
More cool penicillin data - A/Prof J Bennett presents NZ data for subcut BenPen for RHD/ARF
💉 Penicillin >20ng/mL for 56d & >10ng/mL for 70d
💉 Worked better in ⬆️ BMI
💉 No breakthrough infections
😊 Highly accepted - only 1 pt switched back to IM BenPen

#LISSSD25 #idsky
June 3, 2025 at 12:49 AM
A/Prof Laurens Manning presents a human challenge study looking to define penicillin MIC to prevent strep throat.

💊 ~9ng/mL penicillin (lower then standard threshold 20ng/mL) prevents clinical strep throat and systemic inflammation as measured by CRP.

#LISSSD25 #idsky
June 3, 2025 at 12:37 AM
Prof M Good from Griffith reports some cool unpub phase I vaccine data from two vaccine candidates (J8/S2 & P*17/S2)
💉 Both protect in 🐁
💉 Induce ab response in🚶‍♂️
💉 Wanes after 6 months, BUT
💉 Opsonic killing increases after 6m

#LISSSD25 #strepA #idsky
June 2, 2025 at 11:38 PM
From a non-scientific view the cream onion bagel (pictured) so far S-tier conference snack #LISSSD25
June 2, 2025 at 5:38 AM
A/Prof A Anderson talks about her qualitative research into Strep A vaccination
🗝️ 80x rates of ARF in some NZ groups
🗝️ ARF viewed as ongoing effect of colonisation
🗝️ Strep A vac a good thing (even 4 prochoice)
🗝️ Whanau (family) centric approach for consent and delivery

#LISSSD25 #idsky #strepA
June 2, 2025 at 5:12 AM
Prof A Steer speaks about the progress to a Strep A vaccine, and highlights the current Emm and non-emm candidates as well as the challenges in Strep A. Steer highlights new human challenge models, published trial complication guidelines and monitoring, and building momenum. #LISSSD25 #idsky
June 2, 2025 at 4:11 AM
Prof de Silva & Dr Keeley speak on Strep A epi & immunity in the Gambia.
🗝️ Hyperendemicity of Strep A
🗝️ Index infections not explained by household contacts
🗝️ Early life immunity develops <2 y/o
🗝️ Ab response to carriage & infection
🗝️ ?protective immunity from SLO, SpyAD, SpyCEP

#LISSSD25 #IDsky
June 2, 2025 at 3:50 AM
Dr K Brown speaks about developing and validating an AI model for interpretation of non expert handheld parasternal images for DX of MR for RHD which had good sens (0.82) & spec (0.82) for LMIC setting. Also implementation study found it highly acceptable for staff & patients. #LISSSD25 #RHD
June 2, 2025 at 2:07 AM