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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.
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Catalase positive, beta-hemolytic Staphylococcus is
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The correct answer is  Staphylococcus aureus is beta hemolytic, produce a sharply defined clear colorless zone of hemolysis on blood agar within which red cells are completely absent. Staphylococcus aureus is catalase positive. Catalase test: place a loopful of hydrogen peroxide on colonies on the nutrient agar. Prompt effervescence indicates catalase production. Ref: Textbook of Microbiology; Ananthanarayanan and Panicker; 10th Edition; Page no: 207