system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A farmer has an ulcer on a leg with indurated margin and multiple sinuses with discharging black granules. The likely diagnosis is
assistant
The correct answer is  Actinomycotic mycetoma - white to yellow granules and filaments are thin. Mycotic mycetoma - black granules and filaments are stout. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition