Alternaria osteomyelitis. Evidence of specific immunologic tolerance

Area of Science:

• Mycology
• Immunology
• Infectious Diseases

Background:

• Fungal sinusitis can present with complex clinical manifestations, including invasive fungal infections.
• Osteomyelitis of the maxilla is a rare but severe complication of chronic sinus infections.

Observation:

• A 31-year-old male presented with maxillary sinus infection and osteomyelitis.
• In vitro lymphocyte transformation studies were performed to assess immune response.
• Specific immune tolerance to Alternaria organisms was identified in the patient.

Findings:

• The etiologic agent of the infection was successfully recovered from the patient.
• The causative organism was identified as Alternaria alternata, a common airborne fungus.
• The findings suggest a role for Alternaria alternata in invasive fungal sinusitis with contiguous osteomyelitis.

Implications:

• This case highlights the importance of considering fungal pathogens, particularly Alternaria alternata, in refractory or severe cases of maxillary sinusitis and osteomyelitis.
• Understanding the specific immune tolerance observed in this patient could offer insights into the pathogenesis of invasive fungal infections.
• Further research into immune responses to fungi like Alternaria alternata may lead to improved diagnostic and therapeutic strategies for invasive fungal sinusitis.