Tuberculosis?...10 points! ?!
Question: tuberculosis.?...10 points! .?
1.What evidence do scientists have that tuberculosis is an ancient disease.?
2.How widespread is tuberculosis today.?
3. What happens when a tuberculosis bacterium enters a human body.?
Thanks!
Health Question & Answer
2.How widespread is tuberculosis today.?
3. What happens when a tuberculosis bacterium enters a human body.?
Thanks!
Health Question & Answer
Answers:
1:) Scientists have discovered tuberculosis in 9,000 year-old human bones found submerged off Israel's coast -- evidence the disease is at least 3,000 years older than previously thought, researchers said on Wednesday.
2:) Over 8 million new cases of TB occur each year worldwide. In the United States, it is estimated that 10-15 million people are infected with the TB bacteria and 22,000 new cases of TB occur each year.
3:) When the inhaled tuberculosis bacteria enter the lungs, they can multiply and cause a local lung infection (pneumonia). The local lymph nodes associated with the lungs may also become involved with the infection and usually become enlarged. The hilar lymph nodes (the lymph nodes adjacent to the heart in the central part of the chest) are often involved.
In addition, TB can spread to other parts of the body. The body's immune (defense) system, however, can fight off the infection and stop the bacteria from spreading. The immune system does so ultimately by forming scar tissue around the TB bacteria and isolating it from the rest of the body. Tuberculosis that occurs after initial exposure to the bacteria is often referred to as primary TB. If the body is able to form scar tissue (fibrosis) around the TB bacteria, then the infection is contained in an inactive state. Such an individual typically has no symptoms and cannot spread TB to other people. The scar tissue and lymph nodes may eventually harden, like stone, due to the process of calcification of the scars (deposition of calcium from the bloodstream in the scar tissue). These scars often appear on x-rays and imaging studies like round marbles and are referred to as a granuloma. If these scars do not show any evidence of calcium on x-ray, they can be difficult to distinguish from cancer.Health Question & Answer
2:) Over 8 million new cases of TB occur each year worldwide. In the United States, it is estimated that 10-15 million people are infected with the TB bacteria and 22,000 new cases of TB occur each year.
3:) When the inhaled tuberculosis bacteria enter the lungs, they can multiply and cause a local lung infection (pneumonia). The local lymph nodes associated with the lungs may also become involved with the infection and usually become enlarged. The hilar lymph nodes (the lymph nodes adjacent to the heart in the central part of the chest) are often involved.
In addition, TB can spread to other parts of the body. The body's immune (defense) system, however, can fight off the infection and stop the bacteria from spreading. The immune system does so ultimately by forming scar tissue around the TB bacteria and isolating it from the rest of the body. Tuberculosis that occurs after initial exposure to the bacteria is often referred to as primary TB. If the body is able to form scar tissue (fibrosis) around the TB bacteria, then the infection is contained in an inactive state. Such an individual typically has no symptoms and cannot spread TB to other people. The scar tissue and lymph nodes may eventually harden, like stone, due to the process of calcification of the scars (deposition of calcium from the bloodstream in the scar tissue). These scars often appear on x-rays and imaging studies like round marbles and are referred to as a granuloma. If these scars do not show any evidence of calcium on x-ray, they can be difficult to distinguish from cancer.Health Question & Answer
1.Tuberculosis evidence have been found in bones found in archeological sites.(Specific kind of lesions in the bone)
2. 3 million deaths of TB in 1995 worldwide.8 million new TB cases every year.20-40% of global population is infected with M.tuberculosis.M.Tuberculosis is responsible for 7% of all deaths worldwide
3.When the M.tuberculosis enters the human body it can be cleared from the respiratory tract(with the normal defence mechanisms).If it survives it can cause an infection or a disease.Health Question & Answer
2. 3 million deaths of TB in 1995 worldwide.8 million new TB cases every year.20-40% of global population is infected with M.tuberculosis.M.Tuberculosis is responsible for 7% of all deaths worldwide
3.When the M.tuberculosis enters the human body it can be cleared from the respiratory tract(with the normal defence mechanisms).If it survives it can cause an infection or a disease.Health Question & Answer
1. Human remains.
2. Not too widespread, but endemic in 3rd. world countries.
3. Can get destroyed by gastric acid; or can spread and cause illness if host is viable.Health Question & Answer
2. Not too widespread, but endemic in 3rd. world countries.
3. Can get destroyed by gastric acid; or can spread and cause illness if host is viable.Health Question & Answer