Explanation

Lactobacilli are a type of bacteria that are commonly found in the human body. They are known for their ability to ferment lactose (a sugar found in milk) and produce lactic acid. Lactobacilli are generally considered to be beneficial bacteria because they help maintain a healthy balance of microorganisms in the body. However, they can also contribute to tooth decay if they are present in large numbers in the mouth. Lactobacilli are normally found in the mouth, gastrointestinal tract, and vagina.

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Answer:

a substance that is made from sugars found in milk and is also made in the body). Lactobacilli usually do not cause disease, but may cause tooth decay. They are normally found in the mouth, gastrointestinal tract, and vagina.

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