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Chain of Infection - Chapter 14.1

AB
A microbial organism with the ability to cause diseaseInfectious agent
Ex. of Infectious agentsExamples: bacteria, virus, fungi, and parasites
A place within which microorganisms can thrive and reproduceReservoir
Ex. of ReservoirsExamples: human beings, animals, and inanimate objects such as water, table tops, and doorknobs
A way for a microorganism to leave the reservoirPortal of exit
Ex. of Portal of exitExamples:microorganism may leave the reservoir through the nose or mouth when someone sneezes OR leave the reservoir of an infected bowel
Method of transfer by which the organism moves or is carried from one place to anotherMode of transmission
Ex. of Mode of transmissionExample:the hands of the health care worker may carry bacteria from one person to another
An opening allowing the microorganism to enter the hostPortal of entry
Ex. of Portal of entryExample: body orifices, mucus membranes, or breaks in the skin OR tubes placed in body cavities, such as urinary catheters
A person who cannot resist a microorganism invading the body, multiplying, and resulting in infectionSusceptible host
Ex. of Susceptible hostExample: a person lacks the immunity or physical resistance to overcome the invasion by the pathogenic microorganism
Links 1 and 2 in Chain of Infectioninfectious agent AND reservoir
Links 3 and 4 in Chain of InfectionPortal of exit AND Mode of transmission
Links 5 and 6 in Chain of InfectionPortal of entry AND Susceptible host


Academic Assistant
R. D. Anderson Applied Technology Center

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