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✓ The triad of dry eyes (keratoconjunctivitis sicca), dry mouth (xerostomia), and rampant dental caries with parotid enlargement strongly indicates Sjögren’s syndrome.
This chronic systemic autoimmune disorder is characterized by lymphocytic infiltration of exocrine glands and is confirmed via Anti-SSA (Ro)/Anti-SSB (La) antibodies or a lip biopsy.
✓ Toxic Shock Syndrome (TSS) from prolonged tampon use is mediated by Staphylococcus aureus TSST-1, a superantigen that directly cross-links MHC class II molecules on APCs with the (beta) region of T-cell receptors.
This bypasses conventional antigen processing, triggering a massive, non-specific cytokine storm (TNF-\(\alpha \), IL-1, IL-2, IFN-\(\gamma \)) that leads to systemic vasodilation, shock, and multiorgan failure.