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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 child has a respiratory infection with a membrane over Peritonsillar area. A swab was taken from the local area. The appropriate media for culture is
assistant
The correct answer is  A common cause of respiratory infection with a membrane over the tonsil is Corynebacterium diphtheriae. Media appropriate for culture is Tellurite blood agar: Tellurite inhibits the growth of most other bacteria acting as a selective agent for diphtheria bacilli. Diphtheria bacilli reduce Tellurite to metallic tellurium which is incorporated in the colonies giving them a grey or black color. Reference: Textbook of Microbiology; Anathanarayan and panicker's; 10th edition; Page no: 242