Fulminant BCG Disease in a 7 Month Old Healthy Male Infant

Area of Science:

• Pediatric infectious diseases
• Dermatology
• Microbiology

Background:

• Disseminated mycobacterial infections are rare but serious complications, particularly in infants.
• The Bacille Calmette-Guérin (BCG) vaccine, used for tuberculosis prevention, can rarely lead to localized or disseminated infection.
• Early recognition and diagnosis are crucial for managing severe pediatric infections.

Observation:

• A 7-month-old infant presented with generalized papular skin lesions that rapidly progressed to ulceration.
• Clinical signs included fever, irritability, tachycardia, tachypnea, and an ulcerated BCG scar with discharge.
• The infant exhibited pancytopenia, indicating bone marrow involvement.

Findings:

• Acid-fast bacilli were identified in skin lesions and at the BCG scar site, confirming mycobacterial infection.
• The clinical presentation and laboratory findings were consistent with disseminated BCG infection or a similar mycobacterial disease.
• Despite medical intervention, the infant's condition deteriorated progressively.

Implications:

• This case highlights the potential for severe, disseminated infections following BCG vaccination in infants.
• It underscores the importance of considering mycobacterial infections in infants presenting with unexplained skin lesions and systemic symptoms.
• Prompt microbiological investigation and appropriate antimicrobial therapy are critical for improving outcomes in such cases.