Question

Which one of the following lactic acid bacteria is used as indicator bacteria for the detection of antibiotic residues in milk.

• A. Lactobacillus acidophilus
• B. Streptococcus salivarius ssp. thermophilus
• C. Bifidobacterium bifidum
• D. Lactobacillus delbrueckii ssp. bulgaricus

Hint:

S. thermophilus: indicator for antibiotic residues.
Sensitive to antibiotics.
Used in antibiotic detection tests.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Antibiotic residues in milk are detected using indicator bacteria.
These bacteria are sensitive to antibiotics.
Step 2: Key Formula or Approach:
No specific formula.
Need to know the indicator bacteria for antibiotic detection.
Step 3: Detailed Explanation:
Streptococcus salivarius ssp. thermophilus is used as an indicator bacterium.
It is sensitive to antibiotics.
Other bacteria are not commonly used for this purpose.
Thus, Streptococcus salivarius ssp. thermophilus is the correct answer.
Step 4: Final Answer:
Streptococcus salivarius ssp. thermophilus is used as indicator bacteria.
Hence, the correct option is (B). \bigskip