In secondary tuberculosis, dormant bacteria are reactivated, tubercles expand and drain into the bronchial tubes and upper respiratory tract, and the severe symptoms cause a gradual wasting of the body
The other type of TB, known as secondary tuberculosis, manifests itself as a disease pattern in a susceptible host. It indicates that the host's immune system has previously been exposed to Mtb. Very soon after the first infection, secondary TB may develop. But more often than not, it shows up years after the main infection, generally when the host immune system is already compromised.In Part 2, we found that following the first TB infection, 90% of people either retain latent TB for the rest of their lives or completely clear it from their bodies. Another 5% of people have a progressive primary infection, meaning that the illness advances to pulmonary or extrapulmonary TB.
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