==pathogen==
*small gram positive bacilli
*''Corynebacterium diphtheriae''
**congestion/over crowding is a risk factor
*incubation 2-5 days (1-10 days)
*''Corynebacterium ulcerans''
**1-6 weeks after onset
**ST segment abnormalities in EKG
**tachycardia or bradycardia
*Demyelinating peripheral neuritis
**10 days - 3 months after onset
*Diphtheria antitoxin
**hose serum
**beware of anaphylaxis
**worldwide shortage is problem
*antibiotics
**macrolides
**14 days
*immunization after treatment
**infection does not guarantee immunity