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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.

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The Chain of Infection


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    1. The Chain of Infection

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

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

    4. There are six links in the chain of infection:

    5. 1st - The Infectious Agent - Any disease-causing microorganism (pathogen)

    6. 2nd - The Reservoir Host -The organism in which the infectious microbes reside

    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.

    8. 3rd - The Portal of Exit -Route of escape of the pathogen from the reservoir Examples: respiratory secretions, blood exposure, breaks in skin

    9. 4th - The Route of Transmission -Method by which the pathogen gets from the reservoir to the new host

    10. Transmission may occur through: Direct Contact

    11. Air

    12. Insects

    13. 5th - The Portal of Entry -Route through which the pathogen enters its new host

    14. Respiratory System inhalation

    15. Gastrointestinal System ingestion

    16. Urinary & Reproductive Tracts Sexual contact

    17. Breaks in Protective Skin Barrier

    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.

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

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

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

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

    23. 2. Asepsis and Hygiene -Potential hosts and carriers must practice asepsis and maintain proper personal hygiene

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

    25. Control body secretions and wash hands according to protocol.

    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

    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.)

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

    29. Cancer Patients • AIDS Patients • Transplant Patients • Infants • Elderly Patients

    30. “Remember--breaking the chain of infection is the responsibility of each healthcare professional.”