Streptococcal Toxic Shock Syndrome: Diagnostic and Therapeutic Approaches Incorporating Point-of-Care Antigen Testing—Case Series

Abstract

Background: Streptococcal toxic shock syndrome (STSS) is a serious and potentially fatal complication of invasive Streptococcus pyogenes (Group A Streptococcus, GAS) infection, often stemming from severe soft tissue infections. While uncommon, tonsillitis can also lead to STSS, with lethality rates reported as high as 70%. Methods: We present three cases of patients diagnosed with tonsillitis who developed STSS. Point-of-care testing for GAS antigens was utilized to facilitate rapid diagnosis. Results: In all three cases, the characteristic clinical presentations, including scarlatiniform rash, strawberry tongue, and signs of shock with multi-organ dysfunction, were observed. Microbiological evidence confirmed ongoing GAS infections, and point-of-care testing for GAS antigens assisted in the diagnosis of tonsillitis in conjunction with STSS, enabling timely treatment interventions. Conclusions: Rapid diagnosis is crucial for the optimal management of STSS. The point-of-care testing for GAS may be useful for diagnosing STSS associated with tonsillitis.