What Are The Four Agents Of Disease That Cause Infectious Diseases?

The groups of organisms that cause infectious diseases are categorized as bacteria, viruses, fungi, and parasites.

What are the 4 types of infectious diseases?

This article will focus on the most common and deadly types of infection: bacterial, viral, fungal, and prion.

What are the agents of infectious diseases?

There are five major types of infectious agents: bacteria, viruses, fungi, protozoa, and helminths. In addition, a new class of infectious agents, the prions, has recently been recognized. A brief review of the general characteristics of each of these agents and examples of some diseases they cause follows.

What is the agent of a disease?

The term disease causative agent usually refers to the biological pathogen that causes a disease, such as a virus, parasite, fungus, or bacterium. Technically, the term can also refer to a toxin or toxic chemical that causes illness.

What are the 5 most common infectious diseases?

The 5 Most Common Infectious Diseases

  • 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.
  • Malaria.
  • Hepatitis C.
  • Dengue.
  • Tuberculosis.

What is the most common infectious disease?

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.

What are the 10 most common diseases?

  • Unintentional injuries.
  • Chronic lower respiratory disease.
  • Stroke and cerebrovascular diseases.
  • Alzheimer’s disease. Deaths in 2017: 121,404.
  • Diabetes. Deaths in 2017: 83,564.
  • Influenza and pneumonia. Deaths in 2017: 55,672.
  • Kidney disease. Deaths in 2017: 50,633.
  • Suicide. Deaths in 2017: 47,173.
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What are the 7 pathogens?

Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions.

What are the 5 types of infectious agents?

Pathogenic organisms are of five main types: viruses, bacteria, fungi, protozoa, and worms. Some common pathogens in each group are listed in the column on the right. Infectious agents can grow in various body compartments, as shown schematically in Fig.

What are the 4 main pathogens?

Pathogen types. There are different types of pathogens, but we’re going to focus on the four most common types: viruses, bacteria, fungi, and parasites.

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