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Table 2 Main mycetoma agents depending on the color of the grains

From: Madurella mycetomatis infection of the foot: a case report of a neglected tropical disease in a non-endemic region

Dark grains

=fungi mycetoma

Madurella mycetomatis (Sahelian Africa, Middle East, India)

Madurella grisea (South America)

Leptosphaeria senegalensis (Mauritania, Senegal)

Leptosphaeria tompkinsii (Exceptional)

Pyrenochaeta reomeroi (Rare)

Exophiala jeanselni (Rare)

Red grains

=bacterial mycetoma

Actinomadura pelletieri (West Africa)

White and yellow grains

Actinomadura madurae (Cosmopolitan)

Streptomyces somalienis (Desert and subdesertic regions)

Nocardia spp (Tropical humid regions)

White grains

Pseudallescheria budii (Quite rare, tropical and temperate regions)

Acremonium spp (Rare)

Fusarium spp (Rare)

Neotestudina rosatii (Exceptional)

Aspergillus spp (Exceptional)

Dermatophytes (Rare)