What is the chain of infection?

No matter the germ, there are six points at which the chain can be broken and a germ can be stopped from infecting another person. The six links include: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
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What is the chain of infection description?

This describes how microorganisms are transmitted from one person or place to another. This could be via someone's hands, on an object, through the air or bodily fluid contact. The Portal of Entry.
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Why is the chain of infection important?

There are many different germs and infections inside and outside of the healthcare setting. Despite the variety of viruses and bacteria, germs spread from person to person through a common series of events. Therefore, to prevent germs from infecting more people, we must break the chain of infection.
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Where does the chain of infection start?

More specifically, transmission occurs when the agent leaves its reservoir or host through a portal of exit, is conveyed by some mode of transmission, and enters through an appropriate portal of entry to infect a susceptible host. This sequence is sometimes called the chain of infection.
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What links make up chain of infection?

What are the 6 links in the chain of infection?
  • The pathogen. The first link in the chain of infection is the infectious agent or pathogen which can take the form of: ...
  • The reservoir. ...
  • The portal of exit. ...
  • The mode of transmission. ...
  • The portal of entry. ...
  • The susceptible host.
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What is the chain 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 chain of infection Covid?

The virus enters the body by coming into contact with the mucusa of the eyes ,nose and mouth. Either by breathing in the droplets from an infected person or by transferring the virus by touching a contaminated object and then touching the eyes, nose and mouth.
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What are the stages of infection?

The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient).
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What are the three steps in the chain of infection?

Chain of Infection
  1. Infectious Agent – microorganism (e.g. virus, bacteria, or fungi)
  2. Reservoir (source) – a host which allows the microorganism to live, and possibly grow, and multiply. ...
  3. Portal of Exit – a path for the microorganism to escape from the host.
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What are the 4 phases in the course of an infectious disease?

To cause disease, a pathogen must successfully achieve four steps or stages of pathogenesis: exposure (contact), adhesion (colonization), invasion, and infection.
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What are the five signs of an infection?

Know the Signs and Symptoms of Infection
  • Fever (this is sometimes the only sign of an infection).
  • Chills and sweats.
  • Change in cough or a new cough.
  • Sore throat or new mouth sore.
  • Shortness of breath.
  • Nasal congestion.
  • Stiff neck.
  • Burning or pain with urination.
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What is the chain of infection quizlet?

Transmission occurs when the agent leaves its reservoir or host through a portal of exit, is conveyed by some mode of transmission, and enters through an appropriate portal of entry to infect a susceptible host.
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What are the six chain of infection?

The 6 points include: the infectious agent, reservoir, portal of exit, means of transmission, portal of entry, and susceptible host. The way to stop germs from spreading is by interrupting the chain at any link.
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What is the main route to spread infection?

Body fluids – A body fluid e.g. blood, urine, pus, saliva from one person enters the body of another e.g. through cuts or other means such as sexual intercourse (e.g. syphilis, HIV etc.). Through saliva (e.g. glandular fever).
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What are the 4 routes of transmission?

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 is the chain of 5 F's that can cause infection?

5 Fs that cause the spread of food borne diseases are Food (contaminated), Fingers (unclean), Faeces, Fomites, and Flies.
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What are the five basic principles for infection control?

IPC Procedures
  • Basic Principles.
  • Hand hygiene.
  • Standard precautions.
  • Isolation of patients.
  • Hierarchy of controls.
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What are the steps of the chain of infection quizlet?

Terms in this set (6)
  • Infectious Agent. the early sign of an infection.
  • Reservoir. an area where the infection agent can live.
  • Portal of exit. a way for the infection to escape from the reservoir.
  • Mode of Transmission. ...
  • Portal of Entry. ...
  • Susceptible Host.
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Which element is part of the chain of infection quizlet?

A susceptible host is the element in the chain of infection that receives the pathogens and is in a favorable condition for their growth and transmission.
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Which factors are included in the chain of infection quizlet?

  • Infectious Agent.
  • Reservoir Host.
  • Portal of Exit.
  • Mode of Transmission.
  • Port of Entry.
  • Susceptible Host.
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What are the 4 types of infections?

The four different categories of infectious agents are bacteria, viruses, fungi, and parasites. When studying these agents, researchers isolate them using certain characteristics: Size of the infectious agent.
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Which element is part of the chain of infection?

The six links include: the infectious agent, reservoir, portal of exit, mode of transmission, portal of entry, and susceptible host.
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What causes infection?

An infection occurs when germs enter the body, increase in number, and cause a reaction of the body. Three things are necessary for an infection to occur: Source: Places where infectious agents (germs) live (e.g., sinks, surfaces, human skin) Susceptible Person with a way for germs to enter the body.
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What three components are needed to spread infection?

Transmission of infectious agents within a healthcare setting requires three elements: a source (or reservoir) of infectious agents, a susceptible host with a portal of entry receptive to the agent, and a mode of transmission for the agent.
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What are the 3 stages of fever?

The 3 phases of fever
  • Your body reacts and heats up. Your blood and lymphatic system make white blood cells, which fight infection. ...
  • The fever levels off. In the second phase of a fever, the amount of heat you make and lose is the same. ...
  • Cooling down.
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