This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
[{'content': 'Which of the following is used as prophylaxis in case of diphtheria: \nSelect and explain. \nA. DPT vaccine, B. Erythromycin, C. Ampicillin, D. DAT', 'role': 'user'}, {'content': 'Answer: A \nExplanation: •\xa0In most countries, the diphtheria toxoid vaccine is given in combination with tetanus toxoid and\xa0pertussis vaccines (DTP vaccine).\n• DPT vaccine is most effectively used for prophylaxis and prevention of diphtheria.\n• Diphtheria is caused by the bacterium Corynebacterium diphtheriae. This germ produces a toxin\xa0that can harm or destroy human body tissues and organs.\n• One type of diphtheria affects the throat and sometimes the tonsils. Another type, more common\xa0in the tropics, causes ulcers on the skin.\n• Diphtheria affects people of all ages, but most often it strikes unimmunized children.\n• It is transmitted from person to person through close physical and respiratory contact.\n• DOC for Diphtheria infection: Erythromycin', 'role': 'assistant'}]