Most common source of Diphtheria
Case
Carrier
Both
None
Ans. is 'b' i.e., Carrier Diphtheria is an acute infectious disease caused by toxigenic strains of corynebacterium diphtheriae. Source of infection cases or carriers; carriers are common sources of infection, their ratio is estimated to be 95 carriers for 5 clinical cases. Infective period - 14 - 28 days from the onset of disease. Age group - 1 to 5 years Sex - Both sexes Incubation period - 2 - 6 days