If acid is produced in Litmus Milk, what color change occurs?

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Prepare for the UCF General Microbiology Lab Midterm Exam. Study using flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

When acid is produced in Litmus Milk, it results in a color change to pink. This is due to the pH indicator litmus present in the medium. Litmus changes color in response to pH variations; when the pH of the medium drops (becoming more acidic), the litmus turns from its neutral purple to pink. This reaction indicates that fermentation is occurring, typically as a result of lactic acid production by certain bacteria. This color change is an important visual cue for microbiologists to assess the metabolic activities of microorganisms in the Litmus Milk medium.