<prompt> Which of the following most accurately describes the therapy available for the prevention and treatment of C. diphtheriaeAntimicrobial therapy for prophylaxis onlyDiphtheria toxoid DPT booster vaccination onlyAntitoxin onlyAntimicrobial therapy and prophylaxis, antitoxin, and toxoid DPT  <response>: Protection against C. diphtheriae can be established through both active and passive immunity. Active immunity consists of a toxoid administered in the form of the DPT vaccine. Passive immunity is established by administering diphtheria antitoxin immunoglobulins. Antimicrobial therapy erythromycin can be used to effectively treat patients with clinical diphtheria. 