Infectious Diseases February 2018 Key Learnings for Today



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What is an Infection?

The invasion and multiplication of microorganisms such as bacteria, viruses, fungi and parasites that are not normally present within the body.

Bacteria

  • Can thrive in many different types of environments: extreme heat or cold, radioactive.
  • Larger than viruses.
  • Reproduce on their own.
  • Important! Most bacteria cause no harm to people, but there are exceptions.

Bacteria

Examples of infections caused by bacteria could include:

  • Strep throat
  • Tuberculosis (TB)
  • Urinary tract infections
  • Can these be treated? How?

Viruses

Viruses

Diseases caused by viruses may include:

  • Chickenpox
  • Measles
  • Common colds
  • Can these be treated? How?

Reservoirs – “Hiding Places”

    • People
    • Animals
    • Equipment
    • Water

Any place where an infectious agent can live

Portal of Exit – “The Way Out”


The way the Infectious Agent leaves the reservoir

Mode of Transmission – “Getting Around”

The way the Infectious Agent gets from the reservoir to the new host

Contact

Direct Indirect

Mode of Transmission Con’t

  • Droplet
  • ≤ 3 feet

  • Airborne

Mode of Transmission Con’t


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