Communicable Diseases 2 - Communicable Diseases Richard...

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Communicable Diseases Richard Taylor, PhD, MPH
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Learning Objectives Describe the burden of disease caused by communicable diseases. Identify the roles that barrier protections play in preventing communicable diseases. Identify roles that vaccinations can play in preventing communicable diseases.
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Learning Objectives Identify the roles that screening, case finding, and contact treatment can play in preventing communicable diseases. Identify the conditions that make eradication of a disease feasible Describe a range of options for controlling the HIV/AIDS epidemic
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Communicable Disease An disease due to an organism such as a bacteria or virus which is transmitted person-to-person or from animals or the physical environment to human by a variety of routes from air and water, to contaminated articles or fomites, to insect bites and animal bites. Here considered a subset of infectious disease.
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Koch’s Postulates 1. The microorganism must be found in abundance in all organisms suffering from the disease, but should not be found in healthy animals. 2. The microorganism must be isolated from a diseased organism and grown in pure culture. 3. The cultured microorganism should cause disease when introduced into a healthy organism. 4. The microorganism must be reisolated from the inoculated, diseased experimental host and identified as being identical to the original specific causative agent. Heinrich Hermann Robert Koch (1843–1910)
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Modes of Disease Transmission Direct Direct contact Droplet spread Indirect Airborne Dust Droplet nuclei Vehicleborne (inanimate) Food Water fomites Vectorborne (animate) Mechanical (flies carry Shigella; fleas carry Yersinia Pestis) Biologic (agent undergoes changes within the vector) Vector s
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Public Health Tools to Address the Burden of Communicable Disease Barrier Protections Immunizations protect individuals and populations Screening and case finding Treatment and contact treatment Efforts to maximize effectiveness of treatments and prevent resistance
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Transmission Wearing a protective air-tight suit equipped with a helmet and face mask. Negatively-
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Communicable Diseases 2 - Communicable Diseases Richard...

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