Causes Of Diseases In Humans?

Infectious diseases can be caused by:

  • Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
  • Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
  • Fungi.
  • Parasites.

How diseases are caused?

Infectious diseases are caused by pathogenic microorganisms, such as bacteria, viruses, parasites or fungi; the diseases can be spread, directly or indirectly, from one person to another. Zoonotic diseases are infectious diseases of animals that can cause disease when transmitted to humans.

What are the 10 most common diseases?

  1. Unintentional injuries.
  2. Chronic lower respiratory disease.
  3. Stroke and cerebrovascular diseases.
  4. Alzheimer’s disease. Deaths in 2017: 121,404.
  5. Diabetes. Deaths in 2017: 83,564.
  6. Influenza and pneumonia. Deaths in 2017: 55,672.
  7. Kidney disease. Deaths in 2017: 50,633.
  8. Suicide. Deaths in 2017: 47,173.

What are some human diseases?

What is BRI

  • Autoimmune Diseases.
  • Allergies & Asthma.
  • Cancer.
  • Celiac Disease.
  • Crohn’s & Colitis.
  • Heart Disease.
  • Infectious Diseases.
  • Liver Disease.

Which is the most common disease in the world?

So, without further ado, here are the five most common infectious diseases.

  1. Hepatitis B. According to current statistics, hepatitis B is the most common infectious disease in the world, affecting some 2 billion people — that’s more than one-quarter of the world’s population.
  2. Malaria.
  3. Hepatitis C.
  4. Dengue.
  5. Tuberculosis.

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