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Mycetoma due to Nocardia caviae
International Journal of Dermatology
|April 1, 1987
Summary
Two rare cases of mycetoma caused by Nocardia caviae were identified in Mexico. This deep mycosis, usually caused by Nocardia brasiliensis, presented unusually in one patient on the trunk.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Microbiology
Background:
- Mycetoma is a prevalent deep fungal infection in Mexico, predominantly caused by Nocardia brasiliensis (86% of cases).
- Nocardia species are aerobic actinomycetes, commonly found in soil and water, causing opportunistic infections.
Observation:
- This report details two cases of mycetoma attributed to Nocardia caviae, marking the first documented instances in Mexico.
- One case presented atypically as a tumor on the trunk, a rare clinical manifestation for mycetoma.
Findings:
- Biochemical properties, following Gordon and Mihm criteria (1962), confirmed the identification of Nocardia caviae strains.
- Histological examination of tissue samples revealed characteristic "grains," aiding in the diagnosis of mycetoma.
Implications:
- Highlights the etiological diversity of mycetoma, extending beyond the common Nocardia brasiliensis.
- Emphasizes the importance of accurate microbiological and histological diagnosis for identifying rare causative agents like Nocardia caviae.
- Suggests the need for broader diagnostic considerations in mycetoma cases, particularly with unusual clinical presentations.