MYCETOMA (MADUROMYCOSIS)
The Organism
ORGANISM
Mycetoma is caused by several fungi
Many different species causing different color grains in the lesion

Black grain - Madurella mycetomatis
White grain -Pseudallescheria boydii
Yellow grains - Nocardia asteroides
Distributed worldwide, but especially in tropics.
Found in soil and plant material
in tropical regions
Mycetoma may be due to several fungi

Entry to the body ENTRY INTO THE BODY
The organism is inoculated into the skin by minor injury e.g. a cut with a thorn when walking barefoot.

Clinical Features CLINICAL FEATURES
Chronic infection of skin (usually foot), subcutaneous tissues, bones

Fungus destroys subcutaneous tissue causing serious deformities
Characterised by grains, the colour of which depend on the organism
Starts as a single painless lesion on the foot which may persist for years
The middle of the lesion become pus filled and contains grains.
Grows slowly, spreading to underlying skin and muscle and bone
No discomfort but may be itching or burning
Secondary bacterial infection is common
Often confused with other fungal infections such as chromoblastomycosis

Incidence and Global Distribution INCIDENCE AND GLOBAL DISTRIBUTION
Particularly common in the tropics
Disease more common in men than women especially those 20-50

Diagnosis DIAGNOSIS
Identification of grains obtained from a soft part of the lesion or by collecting pus.

Occasionally a skin biopsy is necessary.
Microscopy using potassium hydroxide confirms diagnosis and type

Treatment TREATMENT
Does not resolve without appropriate treatment with antibiotics (months-years of treatment) .

Itraconazole Ketoconazole
Deformity may persist.
Surgery to remove the affected tissue completely.
Amputation necessary if bone is involved.



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