Not quibbling with (or answering) your question; it's a fundamentally good one. (My answer is typical: it's all about the money.)
But TB is a bad example of a bacteria causing a disease--- the bacteria is ubiquitous, and most people with the bacteria have no disease. The disease known as TB kills or used to kill a lot of people, and it is characterized by a lot of the bacteria but not caused by it. Kind of like how people with stomach ulcers have a lot of the H. Pylori bacteria, but people without ulcers also have lots of H. Pylori.
After a TB infection, some of the bacteria can become surrounded by immune cells and go dormant. This is how people still test positive for having TB bacteria without manifesting symptoms. It’s called a latent TB infection. If the immune system becomes weakened by other factors (autoimmune disease, fighting other infections, taking clot shots, etc) the TB bacteria can revive and cause another TB episode.
Not quibbling with (or answering) your question; it's a fundamentally good one. (My answer is typical: it's all about the money.)
But TB is a bad example of a bacteria causing a disease--- the bacteria is ubiquitous, and most people with the bacteria have no disease. The disease known as TB kills or used to kill a lot of people, and it is characterized by a lot of the bacteria but not caused by it. Kind of like how people with stomach ulcers have a lot of the H. Pylori bacteria, but people without ulcers also have lots of H. Pylori.
After a TB infection, some of the bacteria can become surrounded by immune cells and go dormant. This is how people still test positive for having TB bacteria without manifesting symptoms. It’s called a latent TB infection. If the immune system becomes weakened by other factors (autoimmune disease, fighting other infections, taking clot shots, etc) the TB bacteria can revive and cause another TB episode.
Source: https://www.everydayhealth.com/tuberculosis/guide/latent/