<prompt> Which of the following is the most severe form of DiptheriaNasalCutaneousNasopharynxLaryngopharynx  <response>: Ref: Harrisons, 19th ed. pg. 978 Diptheria is a nasopharyngeal and skin infection caused by Corynebacterium diphtheriae. Toxigenic strains of C. diphtheria produce a protein toxin that causes systemic toxicity, myocarditis, and polyneuropathy. The toxigenic strains cause pharyngeal diphtheria, while the non-toxigenic strains commonly cause cutaneous disease. Harrisons states: Respiratorypharyngeal form of diphtheria is from notiable diseases, while cutaneous diphtheria is NOT Most severe form of diphtheria: Laryngeal 