Question

A person likely to develop tetanus is immunized by administering?

• A. dead germs
• B. weakened germs
• C. wide spectrum antibiotics
• D. preformed antibiotics

Answer 1

The correct option is B

weakened germs

The correct option is B.

Explanation of correct option:

1. Tetanus is a fatal disease caused by a bacteria named Clostridium tetani.
2. A person who is likely to develop tetanus can be immunized by administering a vaccine (Tetanus toxoid) containing weakened germs.
3. The bacteria present in the vaccine are weakened by using formaldehyde. In this way, the bacteria become inactive but not dead.

Explanation of incorrect option:

Option A:

1. Tetanus toxoid doesn’t contain dead germs.
2. A vaccine containing dead germs doesn’t confer strong immunity against the disease.

Option C:

1. Wide-spectrum antibiotics are used when there is an infection by multiple groups of bacteria or when the suspected bacteria group is unknown.
2. The tetanus vaccine doesn’t contain a wide spectrum of antibiotics.

Option D:

1. The vaccine to prevent tetanus doesn’t contain preformed antibiotics.
2. Preformed antibodies are sometimes used to combat disease but not preformed antibiotics.

Final answer: A person likely to develop tetanus is immunized by administering weakened germs.