Annual Risk of Infection

Reference work entry


The Annual Risk of Infection indicates what proportion of the population will be infected (whether primarily infected or reinfected) with, for example tubercle bacilli in the course of one year. It is usually expressed as a percentage or as a rate. For example, ARI that is available from a tuberculin survey has been utilized to estimate TB incidence through applying Styblo's rule: a 1% ARI was considered to be equivalent to a smear positive TB incidence of 50/100,000 (Styblo, 1985).


Public Health Social Policy Annual Risk Tuberculin Survey 
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