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Someone with latent TB breathes in the droplets of someone else with TB.

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The bacilli are released from the granuloma and a cavity in the lungs appears that is full of bacilli.

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Extensively drug-resistant tuberculosis, XDR, is a rare type of MDR that is even harder to treat. XDR requires a lot of patience and pain tolerance. It is treated with shots of second-line anti-TB drugs.

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Multi-drug-resistant tuberculosis, MDR, is a rare type of TB. MDR is still treatable though. It is just much more expensive to treat.

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If TB is active someone may take antibiotics to help slow down the progression of the TB. They will only work if they are taken on a constant basis.

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Having latent TB does not mean you are good for the rest of your life. TB may become active at any time once you contract it. 5% of people with latent TB develop progressive secondary infection.

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- The bacilli must be very small to travel from the bronchi to the alveoli
- Macrophages (white blood cells) take in the bacilli where they multiply
- Macrophages then clump together and form a granuloma
- A large granuloma is called a Ghon Focus

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5% of people who are infected with TB get active TB. This makes your lung tissues die overtime and the Ghon Focus grows. Some of bacilli will not stay contained in the macrophages and spread to the regional lymph nodes. The infected lymph nodes and the granuloma together are called a Ghon Complex. Dissemination also occurs where the infection may grow to other parts of the body such as the liver, brain, and skin. Millets, or small spots, may start to appear on the body. This is called Miliary Tuberculosis. Someone may also get Tuberculosis Pneumonia.

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95% of cases of TB become latent. This means you do not show many to any symptoms. If you have latent TB, you are not contagious.

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After the macrophages do their job ad create a granuloma, there are two different routes TB may take. May become either latent or active.

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- coughing
- chest pain
- chills
- night sweats
- fatigue
- small lung scars

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TB is spread through air. When someone infected with TB coughs or sneezes, droplets containing the TB bacteria called mycobacterium tuberculosis in the shape of of bacilli are spread through the air.