chap 18 - Microbiology Ch. 18 1. Vaccine- a suspension of...

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Microbiology Ch. 18 1. Vaccine - a suspension of organisms or fractions of organisms used to induce immunity. 2. Vaccinations work: Inoculation of cowpox into skin. Controlling a disease doesn’t require that everyone be immune to it. If most of the population is immune, a phenomenon called herd immunity, out breaks are limited to sporadic cases b/c there are not enough susceptible individuals to support the spread of epidemics. 3. Live attenuated vaccines – use living but attenuated (weakended) microbes. o better stimulation of immunity because best mimic a natural infection o higher risk due to possible back mutation to virulent form; may be somewhat self-boosting if virus doesn’t completely clear the body. Examples: OPV, MMR, flu-mist, Sabin polio vaccine, vaccines used for measles, mumps Inactivated (dead) vaccines – injection of dead virulent form of pathogen. Examples : IPV, rabies, flu shot Toxoids - are inactivated toxins , are vaccines directed at the toxins produced by
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This note was uploaded on 07/12/2011 for the course NURSING 000 taught by Professor Clark during the Spring '11 term at Alabama.

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