<prompt> The type of Diphtheria with highest moality isPharyngealNasalLaryngealConjuctival  <response>: Laryngeal diphtheria causes asphyxia due to mechanical obstruction of the respiratory passage by the pseudomembrane. Emergency tracheostomy may be necessary in such cases. Reference: Textbook of Microbiology; Anathanarayan and panickers; 10th edition; Page no: 240 