I have a list of the ten leading causes of death at any age in a made-up region. One of the questions is 'suggest why pulmonary tuberculosis does not appear on the list'. I have no idea on that one. Also another question is 'why are there only a small number of infectious diseases on the list', got no idea on that one either. Any help would be much appreciated. Thanks!
Biology - 2 Answers
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1 :
Dunno about pulmonary tuberculosis, but I can take a guess about infectious diseases. Infectious diseases are caused by bacteria/viruses/parasites. These organisms have evolved to live and thrive inside a human body. Evolution dictates that organisms always evolve to become better at reproduction. The species that survive are the ones that are good at reproducing themselves. This means that a 'successful' disease-causing organism must be good at spreading itself from human to human. This ALSO means that a successful disease-causing organism must not quickly kill its host. If the organism kills its host, it can't spread any more, and it'll die too. So a successful disease-causing organism is one that can thrive in its host without killing it, allowing the organism to keep reproducing and spreading to new hosts. That's why infectious diseases alone usually don't kill people.
2 :
pulmonary tuberculosis has been eradicated in many countries due to the advent of the multi-drug therapy(MDT) for TB. even in countries that still have a prevalence of TB, most cases are still controlled by the MDTs that they rarely result in death. it should be noted that lately there has been a resurgence of TB cases due to a drug-resistant strain and due to the growing number of AIDS patients who are prone to getting it. most infectious diseases nowadays are easily controlled by antibiotics(bacterial infections) or vaccines(viral), which is why they are not seen more often in the leading causes of death
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