What does it mean to have pulmonary tuberculosis? Is this life threatening?

Potentially serious. Pulmonary tuberculosis is due to lung infection with a "mycobacteria". Historically a serious but treatable infection, there are now strains that can be difficult to treat because of resistance and can be very serious. A "positive PPD test" must be evaluated by a physician, and, if necessary, treated promptly with antibiotics.
TB and contagious. Pulmonary tuberculosis (or tb) is highly contagious and requires antibiotic treatment ... It can be life-threatening if left untreated ...

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