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Understanding Infectious Diseases: Definitions and Impact

Learn about infections, parasites, fungi, bacteria, diseases, epidemics, pandemics, and more in the realm of medicine. Explore concepts like incurable illnesses, chronic vs. acute conditions, bloodborne pathogens, and the immune system.

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Understanding Infectious Diseases: Definitions and Impact

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  1. Definitions • Infection: an organism inside of someone which gets its nourishment from that person, it colonizes that person and reproduces inside them. The human with that organism (germ) inside is called the host. • Parasites • Fungi • Bacteria It is only considered to be an infection if the organism is causing harm to the host.

  2. Definitions (cont’d) • Disease: is any disturbance or anomaly in the normal functioning of the body that probably has a specific cause and identifiable symptoms. • A widespread disease is called an epidemic, and a disease which is global is called a pandemic. • Infectious Disease: a disease as the result of an infection.

  3. Definitions (cont’d) • Non-curable or Incurable: describing something for which there is no cure. This does not mean that the illness or disease is not treatable. • Example: Cancer can be treated, but there is no cure.

  4. Definitions (cont’d) • Chronic: Persists for a long time, or constantly recurring. • Acute: of a short duration but typically severe • Bloodborne pathogen: can be spread by contamination of blood • Immune System: a system that protects the body from foreign substances and pathogens by producing the immune response.

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