A young woman with fever, vomiting, diarrhea, rash and vaginal culture with many coagulase-positive staphylococci; what diagnosis?

• A. Kawasaki disease
• B. Pelvic inflammatory disease
• C. Scalded skin syndrome
• D. Toxic shock syndrome

Answer: (D)

Toxic shock syndrome is caused by production of TSST-1, a superantigen toxin from Staphylococcus aureus, which triggers an enormous, body-wide immune response. This leads to fever, vomiting, diarrhea, a diffuse sunburn-like rash, and potential rapid progression to shock and multi-organ involvement. In this scenario, the vaginal culture showing many coagulase-positive staphylococci points to Staphylococcus aureus as the toxin source, which fits TSS especially in the setting of tampon-associated risk. The rash in TSS is characteristic and widespread, and desquamation often appears after the acute phase.

Kawasaki disease would present in young children with prolonged fever and characteristic mucocutaneous findings and lymphadenopathy, not typically linked to toxin-mediated shock or vaginal colonization. Pelvic inflammatory disease involves pelvic pain with cervical motion tenderness and adnexal inflammation, not the systemic toxic syndrome with a diffuse rash. Scalded skin syndrome, caused by exfoliative toxins, mainly affects infants and young children and presents with skin blistering and peeling rather than the toxin-associated systemic picture seen here.

So the combination of systemic symptoms, diffuse rash, and a vaginal culture showing coagulase-positive staphylococci best fits toxic shock syndrome.