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Granulomas associated with tetanus toxoid immunization

D Cominos1, G Strutton, I Busmanis

  • 1Department of Anatomical Pathology, Royal Brisbane Hospital, Australia.

The American Journal of Dermatopathology
|April 1, 1993
PubMed
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Localized nodular reactions following tetanus toxoid injections were studied. Histology revealed granulomas containing aluminum and phosphorus at injection sites, indicating a potential link between vaccine adjuvants and localized reactions.

Area of Science:

  • Immunology
  • Dermatopathology
  • Materials Science

Background:

  • Tetanus toxoid vaccines are widely administered for prophylaxis against tetanus.
  • Adjuvants, such as aluminum salts, are often included in vaccines to enhance immune response.
  • Localized skin reactions can occur at injection sites, but their specific pathogenesis is not always clear.

Observation:

  • Two patients presented with localized nodular skin reactions at sites of previous tetanus toxoid immunizations.
  • Histopathological examination of the lesions demonstrated granuloma formation.
  • Granulomas contained central granular debris surrounded by histiocytes, a lymphoid infiltrate, and eosinophils.

Findings:

  • Energy-dispersive X-ray microanalysis identified aluminum and phosphorus within the granular debris of the granulomas.

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  • These elements were notably absent in the surrounding inflammatory infiltrate.
  • The findings suggest that vaccine-associated aluminum compounds may contribute to granuloma formation.

    • Implications:

    • This study provides histopathological evidence linking aluminum-containing adjuvants in tetanus toxoid vaccines to localized nodular reactions.
    • Understanding the composition of these reactions can inform clinical management and vaccine formulation.
    • Further research may explore the precise mechanisms of adjuvant-induced granuloma formation and long-term implications.