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1. Epidemiologi
when an outside agent (entity that causes disease; can be chemical,
c triangle
physical, or biological) capable of causing the disease interacts with a
vulnerable host (e.g., susceptible organism, human, animal) in an
environment (conditions that are not part of the agent and/or host but
influence their interaction)
2. Chain of infection how pathogenic microorganisms are transmitted from one person to
another
susceptible host, portal of entry, mode of transmission, agent, reservoir,
portal of exit
3. Susceptible hostindividual or animal that is susceptible to infection (e.g.
immunocompromised
human)
4. Portal of entry where the infectious agent enters a susceptible host (e.g. mouth)
5. Mode of how the agent travels to another host; this may be direct or may
trans- include an intermediate or indirect contact (e.g., droplets are inhaled by
mission another individual)
6. Agent any microorganism that can cause infection (e.g., the common cold virus)
7. Reservoir the environment where the agent resides; water sources, feces, bodily
secretions (e.g., an individual's nasal cavity)
8. Portal of exit how the agent leaves the reservoir of the host (e.g., when the host
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, CPH Exam (Public Health Biology & Human Disease Risk) With All
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sneezes)
9. Pasteur father of germ theory +
bacteriology 1st vaccines for
rabies + anthrax
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, CPH Exam (Public Health Biology & Human Disease Risk) With All
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best known for intervention of the technique of treating milk to stop bacterial
contamination (pasteurization)
understanding = predicting spread of infectious diseases
10. Koch's postulates series of guidelines used to identify the microorganism that causes
a specific
disease
particular microorganism causes diseases, taken from diseased animals,
isolated
+ grown in culture, inserted in animal and causes disease, reisolated from
animal
11. Mechanical carries a pathogen on its body from one host to another (not as an
vec- tor infection)
12. Biological vector carries a pathogen from one host to another after becoming infected
itself
13. Fomite inanimate objects that can become contaminated with infectious agents
serve as a mechanism for transfer between
hosts ex: water fountain at a park
14. SEIR susceptible, exposed, infectious, recovered
infection
model LPi = latency
period IPi =
infectious period
ti = 1st time individual is exposed to the virus
xLP = # of days for an exposed individual to recover from the disease
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