What are stages of infection cycle?

The six links include: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host. The way to stop germs from spreading is by interrupting this chain at any link.
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What are the 4 stages of infection in order?

10.3B: Disease Development
  • Stages of Disease.
  • STAGE 1: INCUBATION PERIOD.
  • STAGE 2: PRODROMAL PERIOD.
  • STAGE 3: ACUTE PERIOD.
  • STAGE 4: CONVALESCENCE PERIOD.
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What are the 6 stages of infection in the chain of infection?

The six links in the chain are:
  • The Infectious Agent – or the microorganism which has the ability to cause disease.
  • The Reservoir or source of infection where the microorganism can live and thrive. ...
  • The Portal of Exit from the reservoir. ...
  • The Mode of Transmission. ...
  • The Portal of Entry. ...
  • The Susceptible Host.
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What are the 5 basic modes of transmission of infection?

Modes of transmission
  • Direct. Direct contact. Droplet spread.
  • Indirect. Airborne. Vehicleborne. Vectorborne (mechanical or biologic)
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What are the three stages along the chain of infection?

Infectious agent (pathogen) Reservoir (the normal location of the pathogen) Portal of exit from the reservoir. Mode of transmission.
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The Infection Control Cycle/Cycle of Infection



How do you remember the chain of infection?

Terms in this set (6)
  1. Infectious Agents. -Pathogenic. -Microorganisms.
  2. Reservoirs. -Infected. -Individual or animal.
  3. Portal of exit (exit route) -Secretions. -Feces. -Blood. ...
  4. Means (method) of transmission. -Hands. -Contaminated blood. -Air droplets. ...
  5. Portal of entry (entrance) -Mouth. -Break in skin. ...
  6. Susceptible host. -Another person.
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What is the last step in the chain of infection?

The last link in the chain of infection is the susceptible host.
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What are the 3 major portals of entry for disease?

Infectious agents enter the body through various portals, including the mucous membranes, the skin, the respiratory and the gastrointestinal tracts.
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What is the prodromal stage of infection?

The prodromal stage refers to the period after incubation and before the characteristic symptoms of infection occur. People can also transmit infections during the prodromal stage. During this stage, the infectious agent continues replicating, which triggers the body's immune response and mild, nonspecific symptoms.
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What are the 4 routes of transmission in infection control?

Diseases can spread in many ways
  • Airborne transmission. Airborne transmission occurs when infectious agents are carried by dust suspended in the air. ...
  • Respiratory (droplet) transmission. ...
  • Sexually transmitted diseases (STDs) ...
  • Animal or insect transmission. ...
  • Food or water transmission. ...
  • Health care transmission.
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What are the three 3 main routes of transmission?

The main routes of transmission are listed below.
  • Person-to-person. Touch. ...
  • Food. Microbes need nutrients for growth and they like to consume the same foods as humans. ...
  • Water. Some diseases are caused by drinking water that is contaminated by human or animal faeces, which may contain disease-causing microbes. ...
  • Insects. ...
  • Fomites.
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