The Chain of Infection.

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Presentation transcript:

The Chain of Infection

As healthcare professionals, it is important to understand two facts about infection:

The various ways infection can be transmitted. 2. The ways the infection chain can be broken.

There are six links in the chain of infection:

1st - The Infectious Agent - Any disease-causing microorganism (pathogen)

-The organism in which the infectious microbes reside 2nd - The Reservoir Host -The organism in which the infectious microbes reside

-Route of escape of the pathogen from the reservoir 3rd - The Portal of Exit -Route of escape of the pathogen from the reservoir Examples: respiratory secretions, blood exposure, breaks in skin

4th - The Route of Transmission -Method by which the pathogen gets from the reservoir to the new host

Transmission may occur through: Direct Contact

Air

Insects

5th - The Portal of Entry -Route through which the pathogen enters its new host

Respiratory System inhalation

Gastrointestinal System ingestion

Urinary & Reproductive Tracts Sexual contact

Breaks in Protective Skin Barrier

6th - The Susceptible Host -The organism that accepts the pathogen The support of pathogen life and its reproduction depend on the degree of the host’s resistance.

Organisms with strong immune systems are better able to fend off pathogens.

Organisms with weakened immune systems are more vulnerable to the support and reproduction of pathogens.

How to interrupt the chain of infection: -The essential part of patient care and self-protection.

1. Pathogen Identification -Identification of infectious agent and appropriate treatment

2. Control Portals of Exit -Healthcare personnel must practice standard precautions:

3. Prevent a Route of Transmission -Prevent direct or indirect contact by: Proper handwashing Disinfection & sterilization techniques Isolation of infected patients Not working when contagious

4. Protect Portal of Entry -Healthcare professionals must make sure that ports of entry are not subjected to pathogens. (nose, mouth, eyes, urinary tract, open wounds, etc.)

5. Recognition of Susceptible Host -Healthcare professionals must recognize and protect high-risk patients.