From the public health point of view, the best way to prevent TB is to provide effective treatment to people with infectious TB.This interrupts the chain of transmission. Good treatment programmes are the best prevention programmes. HIV-infected individuals are particularly susceptible to infection with M. tuberculosis and the development of TB. What are the ways of protecting HIV-infected individuals from exposure to TB in health care settings? What is the role of BCG? HIV-infected individuals who are already infected with M. tuberculosis have a high risk of developing active TB. Can we do anything to decrease this risk? This chapter addresses these questions.

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