Assessment of cellular immune parameters in paediatric toxic shock syndrome: a report of five cases

Area of Science:

• Immunology
• Infectious Diseases
• Pediatrics

Background:

• Toxic shock syndrome (TSS) and septic shock (SS) present with similar clinical signs of severe inflammation.
• Septic shock is characterized by delayed immunosuppression, including lymphopenia and reduced HLA-DR expression on monocytes.
• Understanding the immune alterations in TSS is crucial for differentiating it from SS and guiding treatment.

Observation:

• This study monitored five children diagnosed with TSS.
• TSS cases were confirmed by clinical signs and specific Vbeta expansions linked to bacterial toxin genes.
• Regulatory T cell (Treg) percentages were measured in TSS patients.

Findings:

• Patients with TSS showed an increased percentage of circulating regulatory T cells (Treg).
• Unlike septic shock, TSS did not exhibit lymphopenia or decreased HLA-DR expression on monocytes.
• These findings suggest distinct immune alterations in TSS compared to SS, despite similar clinical presentations.

Implications:

• The distinct immune profiles of TSS and SS indicate different underlying pathophysiological mechanisms.
• Further research into Treg subsets in TSS is needed to elucidate the role of superantigens.
• Differentiating immune responses in TSS and SS could lead to more targeted therapeutic strategies.