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Previous Volume 341:1226-1227 October 14, 1999 Number 16 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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Tuberculosis, like all infectious diseases, involves exposure to a pathogen resulting in an asymptomatic period of incubation or latency that may progress to active disease. Unlike most other infectious diseases, tuberculosis involves a delay between infection and disease that is extremely variable, ranging from a few weeks to a lifetime. Therefore, the development of active tuberculosis in someone known to have been previously infected raises the question whether this represents a recrudescence of the initially infecting organism (endogenous reactivation) or a new strain of Mycobacterium tuberculosis (exogenous reinfection).

For decades, this question has been central to a debate in which . . . [Full Text of this Article]

References

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