Related Experiment Video
Updated: Jan 22, 2026

Intradermal Inoculation of Mycobacterium avium in the Mouse Ear
Published on: July 3, 2025
Concurrent Persistent Cryptococcosis and Mycobacterium avium Complex Infections in a Patient With Human
Abdulaziz U Joury1,2, Mona Alshehri3, Mustafa Alhasan4
1Department of Internal Medicine, Ochsner Clinic Foundation, New Orleans, LA.
Abstract:
Background: Fungal infections are known for their chronicity and latency and are difficult to eradicate. The pathophysiology of these invading pathogens and the resulting alteration of the immune system are not fully understood. Fungal meningitis is associated with significant rates of morbidity and mortality, especially among immunocompromised patients. Cryptococcosis, an infection secondary to the fungus Cryptococcus, is one of the most important opportunistic infections among patients with human immunodeficiency virus (HIV), and expediting treatment is crucial. Case Report: We report the case of a 28-year-old male with HIV who had a simultaneous co-infection with cryptococcal meningitis and Mycobacterium avium complex (MAC). The patient required a 2-week induction phase of antifungal medication with amphotericin B and flucytosine. Despite aggressive initial therapy and the patient's significant clinical improvement, his radiologic findings and lumbar puncture showed persistent cryptococcal infection. Conclusion: Concurrent infection with cryptococcosis and MAC is extremely rare even in immunosuppressed patients. In our case, the concurrent infection was associated with a prolonged course of therapy during the induction phase for cryptococcosis.
Insights
This case report details a rare co-infection of cryptococcal meningitis and Mycobacterium avium complex (MAC) in an HIV-positive patient. The simultaneous infection prolonged antifungal therapy during the induction phase.
Area of Science:
- Infectious Diseases
- Immunology
- Mycology
Background:
- Fungal infections, particularly fungal meningitis, present significant challenges due to chronicity, latency, and difficulty in eradication.
- The complex interplay between fungal pathogens and the host immune system remains incompletely understood.
- Cryptococcosis is a critical opportunistic infection in human immunodeficiency virus (HIV)-positive individuals, necessitating prompt treatment.
Observation:
- A 28-year-old male with HIV presented with simultaneous cryptococcal meningitis and Mycobacterium avium complex (MAC) co-infection.
- The patient underwent a 2-week induction phase of antifungal therapy with amphotericin B and flucytosine.
- Despite initial aggressive treatment and clinical improvement, persistent signs of cryptococcal infection were noted on imaging and lumbar puncture.
Findings:
- Concurrent cryptococcosis and MAC co-infection is exceptionally rare, even in immunocompromised populations.
- This rare co-infection was associated with an extended induction phase of antifungal therapy for cryptococcosis.
Implications:
- Highlights the potential for rare co-infections to complicate treatment protocols in immunocompromised patients.
- Underscores the need for vigilant diagnostic and therapeutic approaches in managing opportunistic infections in HIV patients.
- Suggests that co-infections may necessitate prolonged or modified treatment strategies beyond standard protocols.
More Related Videos
Related Concept Videos
Protein Complex Assembly
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Immunodeficiency Diseases
There are three main causes of immunodeficiency...
What are Viruses?
Protein Complexes with Interchangeable Parts
The SCF ubiquitin ligase is a protein complex of five individual proteins. This complex attaches ubiquitin to other target proteins to mark them for degradation. In order...
Formation of Complex Ions
Complexation Equilibria: Factors Influencing Stability of Complexes

