The Chain of Infection

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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.
The Chain of Infection

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The chain of infectionSlide 1

The Chain of Infection

As healthcare professionals it is important to understand two facts about infectionSlide 2

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

The chain of infectionSlide 3

The various ways infection can be transmitted.

2. The ways the infection chain can be broken.

There are six links in the chain of infectionSlide 4

There are six links in the chain of infection:

1st the infectious agentSlide 5

1st - The Infectious Agent

- Any disease-causing microorganism (pathogen)

2nd the reservoir hostSlide 6

2nd - The Reservoir Host

-The organism in which the infectious microbes reside

The chain of infectionSlide 7

What are “Carrier Hosts?”

Hosts that do not show any outward signs or symptoms of a disease, but are still capable of transmitting the disease are known as carriers.

3rd the portal of exitSlide 8

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 transmissionSlide 9

4th - The Route of Transmission

-Method by which the pathogen gets from the reservoir to the new host

The chain of infectionSlide 10

Transmission may occur through:

Direct Contact

The chain of infectionSlide 11


The chain of infectionSlide 12


5th the portal of entrySlide 13

5th - The Portal of Entry

-Route through which the pathogen enters its new host

The chain of infectionSlide 14

Respiratory System


The chain of infectionSlide 15

Gastrointestinal System


The chain of infectionSlide 16

Urinary & Reproductive Tracts

Sexual contact

The chain of infectionSlide 17

Breaks in Protective Skin Barrier

6th the susceptible hostSlide 18

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.

The chain of infectionSlide 19

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

The chain of infectionSlide 20

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

The chain of infectionSlide 21

How to interrupt the chain of infection:

-The essential part of patient care and self-protection.

1 pathogen identificationSlide 22

1. Pathogen Identification

-Identification of infectious agent and appropriate treatment

2 asepsis and hygieneSlide 23

2. Asepsis and Hygiene

-Potential hosts and carriers must practice asepsis and maintain proper personal hygiene

3 control portals of exitSlide 24

3. Control Portals of Exit

-Healthcare personnel must practice standard precautions:

The chain of infectionSlide 25

Control body secretions and wash hands according to protocol.

4 prevent a route of transmissionSlide 26

4. Prevent a Route of Transmission

-Prevent direct or indirect contact by:

Proper handwashing

Disinfection & sterilization techniques

Isolation of infected patients

Not working when contagious

5 protect portal of entrySlide 27

5. Protect Portal of Entry

-Healthcare professionals must make sure that ports of entryare not subjected to pathogens.

(nose, mouth, eyes, urinary tract, open wounds, etc.)

6 recognition of susceptible hostSlide 28

6. Recognition of Susceptible Host

-Healthcare professionals must recognize and protect high-risk patients.

The chain of infectionSlide 29

  • Cancer Patients

  • AIDS Patients

  • Transplant Patients

  • Infants

  • Elderly Patients

The chain of infectionSlide 30

“Remember--breaking the chain of

infection is the responsibility

of each healthcare professional.”

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