This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Communicable diseases, Subject name: Social & Preventive Medicine
Which of the following is not pa of control measures for diphtheria- 
Select and explain. 
A. Treatment of cases with antitoxin and erythromycin, B. Treatment of carriers with antitoxin, C. Isolation of cases, suspected cases and carriers, D. Regular immunization under-fives
B: Treatment of carriers with antitoxin
Answer: B: Treatment of carriers with antitoxin 
Explanation: The carriers should be treated with 10 days course of oral erythromycin, which is the most effective drug for the treatment of carriers . Ref:PARK&;S TEXTBOOK OF PREVENTIVE AND SOCIAL MEDICINE 23rd edition , Page :161