PrinciplesDiseasePt2_OLS

PrinciplesDiseasePt2_OLS - Principles of Disease Part 2:...

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Principles of Disease Part 2: Disease Transmission Chain of Disease Transmission Pathogen in Reservoir Portal of exit Mode of transmission Portal of Entry to new (susceptible) host Reservoirs of Infection Natural host or habitat of a pathogen (place(s) where a pathogen normally lives/multiplies) Human Reservoirs 1. 2. Carriers: No clinical disease, but pathogens inconspicuously harbored and shed to others: A. Subclinical infections B. During incubation or convalescence stage of disease C. Chronic carriers (long-term shedding) D. Passive carriers (contaminated hands) Animal Reservoirs Zoonoses: Diseases that occur primarily in wild or domestic animals that can be transmitted to humans Nonliving Reservoirs Food, Water, Soil Disease Transmission Movement of a disease agent from reservoir (source) to host Direct Contact Transmission Microbes spread by physical contact between source and host (no intermediate objects)
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This note was uploaded on 02/13/2012 for the course MBI 121 taught by Professor Balish during the Fall '08 term at Miami University.

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PrinciplesDiseasePt2_OLS - Principles of Disease Part 2:...

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