#Superantigen
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criticalcarereviews.com
Bacterial Superantigen-Mediated Toxic Shock: Hyperinflammatory Trajectories and Extracorporeal Immunomodulation in Streptococcal Toxic Shock Syndrome

CCR Journal Watch
https://criticalcarereviews.com/latest-evidence/journal-watch
September 26, 2026 at 1:14 PM
neetpgai.bsky.social
🩺 Clinical case challenge

Fever + sunburn-like rash + refractory hypotension + GI symptoms + menstrual tampon use.

Can you identify the diagnosis?

Work through the complete NEET PG case:

Read the case
neetpgai.com/neet-pg-stud...

#NEETPG #Medicine #ClinicalCases #MedicalEducation
Clinical Case: 22-Year-Old With Fever, Sunburn Rash, and Refractory Hypotension on Day 4 of Menses — Toxic Shock Syndrome for NEET PG | NEETPGAI
NEET PG clinical case on toxic shock syndrome: 22-year-old woman, menstrual tampon-associated TSS, CDC criteria, superantigen pathogenesis, clindamycin plus vancomycin, IVIG for streptococcal TSS, sou...
neetpgai.com
August 11, 2026 at 12:59 PM
ralfwittenbrink.bsky.social
auch gegen verwandte Fledermausviren, die möglicherweise von Tieren auf Menschen überspringen und künftige Pandemien verursachen könnten. 
Das Superantigen ist mit den meisten Impfstoffverabreichungssystemen kompatibel. In dieser Studie wurde es als DNA-Impfstoff mittels Mikro-
June 6, 2026 at 1:39 PM
christinavirgil.bsky.social
@fitterhappieraj.bsky.social
Recently Dr Leonardi posted new findings regarding the identification of the location of SARS-CoV-2’s Superantigen.
I’m including my pinned post as it explains a bit about what that means for our T cells
Others disparaged him—particularly a certain writer.
#medsky #SAG
On Nov 28, 2024 Dr Anthony Leonardi posted, “The superantigen has been found despite many attempts to delegitimize the hypothesis and disparage me. I will be going around to collect dues in an arrogant and vindicated manner The evidence was there immunologically of a super antigenic effect, and the people who denied it were incapable of analysis” and attached two photos of screenshots from studies. The first photo highlighted, “Abstract Severe COVID•19 can trigger a cytokine storm, leading to acute respiratory distress syndrome (ARDS) with similarities to Abstract It has been posited SARS-CoV-2 contains at least one unique superantigen-like motif not found any other SARS or endemic coronaviruses. Superantigens are potent antigens that can sener the immune system into overdrive. SARS-CoV-2 causes many of the biological and clinical” The second photo highlighted, “Multisystem inflammatory syndrome in children which may hyperstimulate, lead to AICD. overexuberant differentiation, tissue migration (as per the alternative hypothesis put forth by Habel, et al.), and cytotoxic function. Indeed, De Biasi et al. find production and release of cytokines they describe as similar to a polyclonal, superantigen- driven T-cell activation and observed increased levels of IFN-y in the plasma of Covid-19 patients (30). They also noted the increased expression of CD57 on CD8+ T cells of Covid-19 patients, which they claim denotes a Substantial activation-induced cell death” People still do not understand the immunological implications of a superantigen in terms of T cell memory It distorts memory formation (hyperstimulation and paralysis) It causes overshooting responses If chronic I believe it's responsible for the chronic activation and sloughing And attaches a posted he made from 5/15/22 reading, “SEB sag causes T cells to commit fratricide. I wrote this up in my 2020 hypothesis of Fas mediated T cell death and memory distortion” Activation-induced cell death in human T cells is a suicidal process regulated by cell density but superantigen induces T cell fratricide Patricia Gorak-Stolinska 1, David M Kemeny, Alistair Noble Affiliations + expand PMID: 12576028 DOI: 10.1016s0008-8749(02)00598-1 Abstract Repeated ligation of the TCR results in apoptosis (activation-induced cell death; AICD). Superantigens such as Staphylococcal enterotoxin B (SEB) are particularly efficient at inducing AICD in T cells. We investigated whether apoptosis in human T cell subsets was due to fratricide (killing of neighboring cells) or suicide (cell autonomous death). AICD of Th1, Th2, Tc1, and Tc2 effector cells was dramatically enhanced at low cell densities and could be observed in single cell microcultures. AICD was unaffected by adhesion molecules or neighboring cells undergoing AICD, confirming the predominance of a suicidal mechanism. However, SEB was able to induce fratricidal apoptosis of type 1, but not type 2 cells. Fratricide was also observed when unstimulated T cells were exposed to activated Tc1 effector cells. Thus, AICD is tightly regulated to allow clonal T cell expansion and memory cell generation, but superantigens may subvert this process by allowing T cell fratricide
November 29, 2024 at 3:54 PM
christinavirgil.bsky.social
It only seems fitting to keep them pinned
A screenshot saying, “The virus has a superantigen which can deplete up to 20% of Naive T cells each infection. It also suppresses MHC-1 so T cell reactions range anywhere from the T cells act appropriately to no T cells responding to T cells causing harm. It varies person to person & each infection.” Under the text is a gif of Woody from Toy Story asking the magic 8 ball a question, representing the uncertainty around how our immune response will play out after repeated infections. A screenshot of Part 2 of a tweet that reads, “That being said while T cell reactions vary person2person, infection2infection, l'd also wager the more c19 infections one acquires, the less likely it is that the T cells respond appropriately in subsequent infections For C19, gaining long-term immunity via infection is a farce.”
November 16, 2024 at 4:17 PM
mymedschool.bsky.social
#Toxic shock syndrome TSST-1 mechanism and symptoms USMLE
#USMLEStep1 #MedEd #Microbiology #ToxicShockSyndrome #TSS #StaphAureus #InfectiousDisease #Step1Prep #HighYield #MedSchool #Immunology #CytokineStorm #Superantigen #FutureDoctor #StudyGram #MedTwitter #Anki #BoardExams #MedicalStudent
U01.17.047 Toxic shock syndrome
U01.17.047 Summary: Explore the pathophysiology of superantigens. Understand how the non-specific binding of MHC II and T-cell receptors leads to massive IFN-γ and IL-2 release, resulting in multi-organ failure.
mymedschool.org
April 22, 2026 at 4:55 AM
unidue-zmb.bsky.social
Check out how Celiac disease superantigen oligomerises and increases permeability in an enterocyte cell model: doi.org/10.1002/anie...

2/2

#17GPS
The Celiac‐Disease Superantigen Oligomerizes and Increases Permeability in an Enterocyte Cell Model
The 33-mer deamidated gliadin peptide is formed in active celiac disease and related to T-cell activation. We determined its oligomeric nature and found a significant increase in gut epithelial perme...
doi.org
March 5, 2026 at 4:31 PM
jorgenponder.mastodon.social.ap.brid.gy
Studie menar sig hittat en superantigen i SARS2. Den lyder D1138PLQFPELDSFKEEL1152, eller den svagare D1138PLQPELDSFKEEL1152, och inte den vanligen misstänkta T678NSPRRAR685.
P3/P3b som de kallar dem, ger inflammation i möss, t ex.
Den triggar 25-35% av […]

[Original post on mastodon.social]
November 28, 2024 at 6:46 PM
jorgenponder.mastodon.social.ap.brid.gy
Study finds potential superantigen in SARS2. It's D1138PLQFPELDSFKEEL1152, and the weaker D1138PLQPELDSFKEEL1152 and not the usual suspect T678NSPRRAR685.
P3/P3b as they call them, yield inflammation in mice.
P3/P3b trigger 25-35% of the T-cells, not good! […]

[Original post on mastodon.social]
November 28, 2024 at 6:43 PM
staph-papers.bsky.social
Staphylococcus aureus superantigens drive a concentration-dependent neutrophilic or eosinophilic pulmonary inflammation in mouse models of cystic fibrosis
Staphylococcus aureus superantigens drive a concentration-dependent neutrophilic or eosinophilic pulmonary inflammation in mouse models of cystic fibrosis - PubMed
Staphylococcus aureus (SA), the most common cystic fibrosis (CF) respiratory pathogen, is uniquely capable of producing superantigen (SAg) exotoxins, which are recognized as the most potent activators...
t.co
July 9, 2026 at 6:42 AM
staph-papers.bsky.social
Preliminary assessment of the therapeutic potential of staphylococcal enterotoxin-like W via biological activity and TCR binding sites analysis
Preliminary assessment of the therapeutic potential of staphylococcal enterotoxin-like W via biological activity and TCR binding sites analysis - PubMed
Staphylococcal enterotoxin-like W (SElW) is a novel, widely prevalent enterotoxin-like protein that functions as a classical staphylococcal superantigen (SAg) and has been shown to exacerbate infections...
t.co
September 1, 2025 at 1:05 PM
gayfabfourfan.bsky.social
X post: AJ Leonardi, MBBS, PhD* @fitterhappierAJ •10/7/25 0 It would actually be very pleasant to live in Veldhoen's fictional world. The list of demands he has, that there is no lymphopenia, superantigen, immune dysfunction, etc, would require ignoring prestigious journals that he himself has never published in. You were wrong, Marc, and bested by someone who was still in med school and hadn't done a postdoc. I think he may have propaganda funding to post this unshakable series of beliefs iiiiiiuiic UCII I ICIG/Uyal U11,11,11/CAI IGUJUU11. I I !GI G are no large outbreaks of infections. Furthermore, there are no increases in cancers due to SARS-CoV-2 infection, no compounded risk of IongCovid, etc. Now it is brain damage 1/2 ILLe,b,I.7 Mary Van Beusekom, MS, February 29, 2024 Topics: COVID-19 The identification of a SARs-CoV2 S2 protein derived peptide with super-antigen-like stimulatory properties on T-cells Thai Hien Tu, Fatima Ezzahra Bennani, ... Christopher E. Rudd S + Show authors rnmmuniratinn, Riolnav A Article niimhpr 14 (91)21 Abstract The mechanisms of postacute medical conditions and unexplained symptoms after SARS-CoV-2 infection [Long Covid (LC)] are incompletely understood. There is growing evidence that viral persistence, immune dysregulation, and T cell dysfunction may play major roles. We performed whole-body positron a air emission tomography imaging in a well-characterized…
October 14, 2025 at 10:44 PM
whrcluster.bsky.social
Carla found that MAIT cells are a type of unconvential T-cells that have a unique response to the mTSS superantigen (from the S. aureus bacteria) due to their high concentration of the superantigen's target. This provides additional insight for future research on TSS risk factors and prevention.
May 1, 2026 at 5:18 PM
davidjoffe64.bsky.social
Paging Dr Leonardi

@fitterhappieraj.bsky.social

doi.org/10.3390/path...
December 5, 2024 at 12:39 PM
castltrastondrs.medsky.network
While #SARSCoV2 is the main trigger for MIS-C, similar hyperinflammatory syndromes (e.g., Kawasaki disease) have been linked to other bacterial & viral infections, though the etiology of these conditions
remains unknown .🦠 may act as a superantigen, a cytokine storm & hyperinflammatory response
November 26, 2025 at 6:25 PM
castltrastondrs.medsky.network
MedSky🧪 IDSky #PedSky identified a specific immune MIS-C signature, namely a superantigen-like polyclonal expansion of T-cell receptor (TCR) Vβ21.3+ CD4+ and CD8+ T cells.This skewing of the TCR repertoire was not observed in Kawasaki’s disease, toxic shock syndrome, or mild-to-severe #COVID19 .
PDF
November 30, 2023 at 6:53 PM
daniellebeckman.bsky.social
“If the cells are frequently turning over but there is still viral persistence, what other plausible explanations are there for this other than replication?”

That's a very good question someone asked, let's do a thread about VIRAL PERSISTENCE in #LongCovid to cover this! (1/10)
Image shows that Viral persistence is one of the potential causes of Long Covid, together with reactivation of latent viruses, multi-tissue damage/autoimmunity, disturbance in gut microbiota, and viral superantigen activation of the immune system
June 10, 2026 at 7:22 PM
madamequisairtout.bsky.social
hypothesize that continuous and prolonged exposure to the viral SAg-like & neurotoxin-like motifs in SARS-CoV-2 spike may promote autoimmunity leading to the development of post-acute COVID-19 syndromes, including MIS-C, longCOVID and neurological complications

👀
www.frontiersin.org/articles/10....
Frontiers | Multisystem Inflammatory Syndrome in Children and Long COVID: The SARS-CoV-2 Viral Superantigen Hypothesis
Multisystem inflammatory syndrome in children (MIS-C) is a febrile pediatric inflammatory disease that may develop weeks after initial SARS-CoV-2 infection o...
www.frontiersin.org
July 2, 2025 at 4:32 PM
globalvisibility.bsky.social
better-experience.blogspot.com/2026/01/the-...

#SUPERANTIGEN
headlines-world.com/advanced-sea...
#SPREHAJALIŠČA ZA #VRAČANJE
headlines-world.com/advanced-sea...
#DINIJEVA #PLOSKEV
aepiot.com/advanced-sea...
aepiot.ro
The 1.77 Visit-to-Visitor Paradox: Why aéPiot's Return Rate Signals a $10B+ Valuation Trajectory. A Deep-Dive Analysis of User Retention Metrics and Their Billion-Dollar Implications.
The 1.77 Visit-to-Visitor Paradox: Why aéPiot's Return Rate Signals a $10B+ Valuation Trajectory A Deep-Dive Analysis of User Retention M...
better-experience.blogspot.com
January 7, 2026 at 4:49 PM
amoberg.bsky.social
2/
www.mdpi.com/2076-0817/11...
Superantigens and SARS-CoV-2
It has been posited SARS-CoV-2 contains at least one unique superantigen-like motif not found in any other SARS or endemic coronaviruses. Superantigens are potent antigens that can send the immune sys...
www.mdpi.com
January 26, 2025 at 7:18 AM
ouli-xie.bsky.social
3) Taking a pangenomic approach (see our prev work doi.org/10.1038/s414...), we systematically characterise mobile genetic elements in these genomes and show that these lineages are associated with acquisition of superantigen carrying prophages and MDR (incl macrolide R gene) ICE
April 24, 2026 at 9:42 AM
sme.sk.web.brid.gy
Zabráni veľkým pandémiám? Vakcínu, ktorú navrhla umelá inteligencia, úspešne otestovali na ľuďoch
AI navrhla špeciálne upravený superantigén.
www.sme.sk
June 9, 2026 at 8:36 PM
cbammermd.bsky.social
www.biorxiv.org/content/10.1...

Seen at
@atranscendedman.bsky.social

I‘ve been thinking of spike protein as a superantigen by principle eversince the emergence of long-term sequelae. 1/2
The identification of a SARs-CoV2 S1 protein derived peptide with super-antigen-like stimulatory properties on T-cells
Severe COVID-19 can trigger a cytokine storm, leading to acute respiratory distress syndrome (ARDS) with similarities to superantigen-induced toxic shock syndrome. An outstanding question is whether S...
www.biorxiv.org
November 28, 2024 at 2:37 PM
ucldiscovery.bsky.social
Open Access UCL Research: An engineered non-toxic superantigen increases cross presentation of hepatitis B virus nucleocapsids by human dendritic cells discovery.ucl.ac.uk/id/eprint/10...
January 28, 2025 at 12:58 PM
acir-org.bsky.social
🖐️ Hi Mam! - A superantigen (MAM) goes to the head of the class (II) to find alternatives to TCRs for specific peptide:MHC binders doi.org/10.1038/s415...
December 21, 2024 at 1:00 PM