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Updated: Jun 28, 2026

Microbiological Rapid On-Site Evaluation for Pulmonary Infectious Diseases
Published on: March 1, 2024
Cryptococcal infection presenting as cellulitis in a renal transplant recipient
J Orsini1, J Nowakowski, V Delaney
1Department of Medicine, Division of Infectious Diseases, New York Medical College and Westchester Medical Center, Valhalla, New York 10595, USA.
Abstract:
Opportunistic infections of skin and soft tissue represent a rare but serious complication following solid organ transplantation. We report a case of severe soft tissue infection caused by Cryptococcus neoformans in a renal transplant recipient. Physicians need to consider the possibility of opportunistic pathogens when managing infections in immunocompromised hosts, especially when symptoms persist despite seemingly appropriate empiric antimicrobial therapy. Tissue sampling for histological and microbiological evaluation is usually necessary to establish a diagnosis.
Insights
Severe soft tissue infections can occur in kidney transplant patients. Cryptococcus neoformans was identified as the cause in one case, highlighting the need for thorough diagnosis in immunocompromised individuals.
Area of Science:
- Infectious Diseases
- Transplantation Immunology
- Dermatology
Background:
- Solid organ transplantation recipients are at increased risk for opportunistic infections.
- Skin and soft tissue infections are rare but potentially severe complications post-transplant.
Observation:
- A case of severe soft tissue infection in a renal transplant recipient is presented.
- The infection was caused by the opportunistic fungus Cryptococcus neoformans.
Findings:
- Persistent infections despite empiric antimicrobial therapy warrant consideration of unusual pathogens.
- Histological and microbiological evaluation of tissue samples are crucial for diagnosis.
Implications:
- Clinicians must consider opportunistic pathogens in immunocompromised hosts, particularly transplant recipients.
- Prompt and accurate diagnosis is essential for effective management of severe infections in this population.
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Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Cytomegalovirus Disease