Where is Lactobacillus GG normally found in the body?

• A. It is a component of normal human intestinal flora
• B. It is primarily found in the stomach
• C. It is not found in humans
• D. It is a yeast strain

Answer: (A)

Lactobacillus GG is a probiotic strain of Lactobacillus rhamnosus that normally resides in the human intestinal tract as part of the gut microbiota. It colonizes the gut and contributes to gut health, helping maintain barrier function and producing beneficial lactic acid. The stomach’s acidic environment limits bacterial inhabitants, so this strain is best described as a member of the intestinal flora rather than a stomach resident. It is a bacterium, not a yeast, and it is found in humans as part of the normal microbiota. Therefore, it is a component of normal human intestinal flora.