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[A case with severe combined immunodeficiency diagnosed with disseminated BCG infection by detecting specific RD gene

Mitsuko Akaihata1, Koichi Hashimoto, Yukihiko Kawasaki

  • 1Department of Pediatrics, Fukushima Medical University.

Kansenshogaku Zasshi. the Journal of the Japanese Association for Infectious Diseases
|May 13, 2011
PubMed

Insights

Bacillus Calmette-Guérin (BCG) vaccination is recommended for infants in Japan. However, severe disseminated BCG infection can occur in infants with undiagnosed immunodeficiency, highlighting the need for caution.

Area of Science:

  • Pediatrics
  • Immunology
  • Infectious Diseases

Background:

  • Bacillus Calmette-Guérin (BCG) vaccination is standard for infants under 6 months in Japan to prevent severe tuberculosis forms.
  • While generally safe, BCG can cause local inflammatory reactions and rarely severe adverse effects like disseminated BCG infection.

Observation:

  • A case report of an 11-month-old boy with severe combined immunodeficiency (SCID).
  • The patient developed fatal disseminated BCG infection after BCG vaccination at 4 months, prior to SCID diagnosis.
  • Treatment with anti-tuberculosis therapy and blood stem cell transplantation was unsuccessful.

Findings:

  • Disseminated BCG infection occurred in an infant with undiagnosed severe combined immunodeficiency.
  • BCG vaccination in immunocompromised infants can lead to severe, life-threatening complications.
  • Early diagnosis of immunodeficiency is crucial for preventing severe BCG-related adverse events.

Implications:

  • Highlights the risk of severe BCG complications in infants with underlying immunological deficiencies.
  • Underscores the importance of considering immunodeficiency in infants presenting with disseminated BCG infection.
  • Suggests a need for careful patient selection or screening for immunodeficiency before BCG vaccination in at-risk populations.

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