Microbiology Quiz
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MICROBIAL GROWTH AND CONTROL
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A sample containing Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli is streaked onto a Mannitol Salt Agar (MSA) plate. After incubation, well-isolated yellow colonies and well-isolated pink colonies are observed in the final quadrant. What is the most logical conclusion based on this result?
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