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
Black Piedra is caused by:
assistant
The correct answer is  Black piedra Caused by Piedraia hoae Gross-Discrete black, gritty, hard nodules on the hair of the scalp Dx- 10% KOH mount of the crushed nodule reveals dark septate hyphae with club shaped asci, each containing 2-8 ascospores