A farmer has an ulcer on the leg with indurated margin and multiple sinuses with discharging granules. The likely diagnosis is -

Mycetoma (Maduramycosis) Is a localized chronic granulomatous involvement of the subcutaneous and deeper tissues, commonly affecting the foot and less often the hand and other parts. Presenting as a subcutaneous swelling with multiple discharging sinuses. Sinuses discharge seropurulent fluid containing granules. These granules are microcolonies of the etiological agents. A similar condition called botryomycosis is caused by Staphylococcus aureus.