Drug of choice for Diphtheria carriers is
**Core Concept**
The question is testing knowledge of antitoxin therapy and carrier management in diphtheria, a bacterial infection caused by Corynebacterium diphtheriae. The correct answer requires understanding of the pharmacological approach to eliminating the carrier state, which involves neutralizing the bacterial toxin.
**Why the Correct Answer is Right**
The drug of choice for diphtheria carriers is erythromycin, a macrolide antibiotic that effectively targets and eliminates the bacterial carrier state. Erythromycin works by inhibiting protein synthesis in bacteria, thereby preventing the production of diphtheria toxin. This is particularly important for carriers who do not exhibit symptoms but can still spread the infection to others.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because penicillin is not the preferred choice for treating diphtheria carriers. While penicillin is effective against many bacterial infections, it is not the most effective antibiotic for eliminating the carrier state in diphtheria.
**Option B:** This option is incorrect because rifampicin is an antibiotic used primarily for treating tuberculosis and some other infections. It is not the preferred choice for treating diphtheria carriers.
**Option C:** This option is incorrect because clindamycin is an antibiotic used to treat a variety of bacterial infections, but it is not the preferred choice for treating diphtheria carriers.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that erythromycin is the preferred antibiotic for treating diphtheria carriers due to its ability to eliminate the carrier state and prevent the spread of infection.
**Correct Answer:** E. Erythromycin