Prototheca wickerhamii--an alga infecting the hand

Area of Science:

• Medical Mycology
• Infectious Diseases
• Dermatology

Background:

• Prototheca wickerhamii is a rare, chlorophyll-containing alga that can cause human infections.
• Algal infections are uncommon and can be misdiagnosed due to similarities with fungal pathogens.
• The organism typically manifests as chronic dermatitis or bursitis, primarily affecting the upper extremities.

Observation:

• A case of hand infection caused by Prototheca wickerhamii is presented.
• The infection presented with symptoms characteristic of chronic dermatitis and bursitis.
• Diagnostic challenges arise as routine microbiological stains and cultures may resemble fungal elements.

Findings:

• Prototheca wickerhamii was identified as the causative agent of the hand infection.
• The infection demonstrated resistance to standard treatments, highlighting the need for specific therapeutic approaches.
• Microscopic examination and culture results can be misleading, potentially delaying accurate diagnosis.

Implications:

• Accurate and timely diagnosis of Prototheca wickerhamii infections is critical.
• Early and aggressive surgical excision of infected tissues is the recommended treatment to prevent complications.
• Increased awareness among clinicians regarding this rare algal pathogen is necessary for improved patient outcomes.