"Risk Factors for Tuberculosis Defined."

According to an abstract submitted by the author to The Lancet Conference 'The Challenge of Tuberculosis', held September 14-15, 1995, in Washington, D.C., "Risk factors in the pathogenesis of tuberculosis include risk factors for exposure, risk factors for infection among the exposed, and risk factors for tuberculosis among the infected. Per unit of incident infectious cases, the risk of exposure varies with the average duration of infectivity of a case and the average number of contacts a case has during this period. In industrialized countries, the duration of infectivity has been reduced by chemotherapy. The number of contacts per case is likely to have changed with a decreasing...

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