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Standard 5: Obj. 1
Identify the components of the chain of infection
| Question | Answer |
|---|---|
| 1. Virulence/infectious agent | Includes not only bacteria but also viruses, fungi, and parasites. The virulence of these pathogens depends on their number, their potency, their ability to enter and survive in the body, and the susceptibility of the host. |
| 2. Number of microorganisms | an infectious agent normally lives and multiplies. The infectious agent depends on the reservoir for survival, where it can reproduce itself in such manner that it can be transmitted to a susceptible host. |
| 3. Susceptible host | Infection does not occur automatically when the pathogen enters the body of a person whose immune system is functioning normally. When a virulent pathogen enters an immune-compromised person, however, infection generally follows. |
| 4. Portal of entry | including the mucous membranes, non-intact skin, and the respiratory, gastrointestinal, and genitourinary tracts. Pathogens often enter the body of the host through the same route they exited the reservoir. |
| 5. Chain of Infection | Infections Agent, Reservoir, Portal of Exit, Mode of Transmission, Portal of Entry, Susceptible Host |
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bmims0002
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