What is the chain of infection in order?

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 an chain of infection?

The means by which an organism transfers from one carrier to another by either direct transmission (direct contact between infectious host and susceptible host) or indirect transmission (which involves an intermediate carrier like an environmental surface or piece of medical equipment). PORTAL OF ENTRY.
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What are the 5 stages of infections in order?

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 is the chain of infection Covid 19?

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 6 steps in 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



What are the 6 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 are the 4 stages of infection?

The natural history of an untreated communicable disease has four stages: stage of exposure, stage of infection, stage of infectious disease, and stage of outcome.
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What are stages of disease?

  • Key Points. The first phase is characterized by complete lack or very few symptoms. ...
  • Key Terms. ...
  • 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 four stages of natural history of disease?

Events that occur in the natural history of a communicable disease are grouped into four stages: exposure, infection, infectious disease, and outcome (see Figure 1.6).
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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 3 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 is the chain of 5 F's that can cause infection?

The common factors in the fecal-oral route can be summarized as five Fs: fingers, flies, fields, fluids, and food. Diseases caused by fecal-oral transmission include typhoid, cholera, polio, hepatitis and many other infections, especially ones that cause diarrhea.
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What are the 4 levels of prevention?

These preventive stages are primordial prevention, primary prevention, secondary prevention, and tertiary prevention.
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What are the 4 stages of pathogenesis?

Stages of Pathogenesis. 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 is the first stage in the infectious process?

1. Incubation. The incubation stage includes the time from exposure to an infectious agent until the onset of symptoms. Viral or bacterial particles replicate during the incubation stage.
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What are the 4 types of infectious diseases?

The four different categories of infectious agents are bacteria, viruses, fungi, and parasites.
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What are the five signs of an infection?

The signs of infection vary according to the organ and site of involvement. Most common symptoms and isgns are fever, chills, rigor, vomitings, diarrhoea, burning urine ,sore throat ,cough, new onset of pain. Inflammation has five cardinal signs which are pain, heat, redness, swelling, and loss of function.
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What are the 4 types of diseases?

There are four main types of disease: infectious diseases, deficiency diseases, hereditary diseases (including both genetic diseases and non-genetic hereditary diseases), and physiological diseases.
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What is the infection process?

The Infectious Disease Process. The infectious disease process includes the following components: (1) agent (2) reservoir (3) portals of entry and exit (4) mode of transmission (5) immunity. Types of agents range from the submicroscopic to the large parasites.
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How many links are in the chain of infection?

Certain conditions must be met in order for a microbe or infectious disease to be spread from person to person. This process, called the chain of infection, can only occur when all six links in the chain are intact. By breaking this chain at any of the links, the spread of infection is stopped.
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Which of the following is the first chain in the chain of infection?

1. The pathogen. The first link in the chain of infection is the infectious agent or pathogen which can take the form of: Viruses – such as Influenza A, shingles and Hepatitis.
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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 are the 3 levels of preventive care?

  • Primary Prevention—intervening before health effects occur, through.
  • Secondary Prevention—screening to identify diseases in the earliest.
  • Tertiary Prevention—managing disease post diagnosis to slow or stop.
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What is the first level of prevention?

Primary prevention

This is done by preventing exposures to hazards that cause disease or injury, altering unhealthy or unsafe behaviours that can lead to disease or injury, and increasing resistance to disease or injury should exposure occur.
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What are the top 5 ways to prevent contracting an infectious disease?

Prevent the spread of infectious disease
  • Immunise against infectious diseases.
  • Wash and dry your hands regularly and well.
  • Stay at home if you are sick.
  • Cover coughs and sneezes.
  • Clean surfaces regularly.
  • Ventilate your home.
  • Prepare food safely.
  • Practise safe sex.
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