Toxic shock syndrome is an acute, multi-system, toxin-mediated disease representing the most fulminant expression of illness caused by toxin-producing strains of Staphylococcus aureus or Streptococcus pyogenes [1][2][3]. Bacterial superantigenic exotoxins drive unconventional lymphocyte activation and a cytokine avalanche that bypasses normal antigen processing, leading to rapid shock and organ dysfunction [1][2][3].
Disease overview
Bacterial Evidence-backed information EN 3/7 applicable sections · ZH 3/7 applicable sections Updated Oct 23, 2026
Toxic shock syndrome is a rare, life-threatening, toxin-mediated illness most often caused by toxin-producing Staphylococcus aureus or Streptococcus pyogenes [1][2][3]. It manifests acutely with multi-system involvement and carries substantial morbidity and mortality, yet is considered underdiagnosed among patients with staphylococcal or group A streptococcal infection who present with shock [1][2][3]. Scientific literature is limited largely to observational studies and case reports because of the disease's low incidence [1].
Read the full clinical and epidemiological profile 4
The syndrome is characterized by rapid shock, multiple organ failure, and potential death driven by superantigen-mediated immune activation [1][2][3]. Staphylococcal forms may be menstrual or nonmenstrual, whereas streptococcal toxic shock is frequently associated with severe group A streptococcal infection and often a necrotizing soft tissue infection [1]. Disseminated intravascular coagulation and tissue damage may arise from the cytokine cascade [2].
Toxic shock syndrome is a rare disease with low incidence that has been described principally through observational studies, clinical cases, and in vitro data [1].
- 1 Atchade E et al. Toxic Shock Syndrome: A Literature Review. Antibiotics (Basel). 2024 Jan 18. PMID: 38247655. doi: 10.3390/antibiotics13010096. PubMed: https://pubmed.ncbi.nlm.nih.gov/38247655/
- 2 Lappin E et al. Gram-positive toxic shock syndromes. Lancet Infect Dis. 2009 May. PMID: 19393958. doi: 10.1016/S1473-3099(09)70066-0. PubMed: https://pubmed.ncbi.nlm.nih.gov/19393958/
- 3 Hansen NS et al. [Toxic shock syndrome]. Ugeskr Laeger. 2020 May 11. PMID: 32400378. PubMed: https://pubmed.ncbi.nlm.nih.gov/32400378/
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