Chapter 20: Epidemiology. Important Point:. If you are having trouble understanding lecture material: Try reading your text before attending lectures. And take the time to read it well!. Common Terms. Common Terms. Fraction that get sick!.
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If you are having trouble
understanding lecture material:
Try reading your text
before attending lectures.
And take the time to read it well!
Fraction that get sick!
The Broad Street Pump. disease.
The Broad Street Pump. disease.Common-Source Outbreak
Individual cases of (deaths from) cholera.
Sewage contamination of drinking water.
Epidemic spreads via multiple sources.
Giardiasis in daycare centers.
Methicillin-resistant Staphylococcus aurius (MRSA)?
Beddings are an example of a Fomite, an inanimate object that can transmit pathogens between people.
Door knobs are another good example of a fomite.
Contact with air from small room containing 12 people.
Contact with air from clean, empty room.
Giardiasis from water.
“Many organisms that cause one disease if they enter one body site are harmless if they enter another, e.g., various enteric urinary-tract pathogens.
...is pretty crappy at dealing with cause and effect when associations are subtle.Epidemiology
Do power lines really cause cancer?
What about cell phones?
...is pretty crappy at dealing with cause and effect when associations are subtle. However...Epidemiology
What about smoking, a crappy diet, and couch-potato tendencies?
Just worry about top three and not about percentages. events and rates of disease. They tend to be the first sets of studies done.Relative Nosocomial Frequencies
2 million acquire and 20,000 die, per-year in the U.S., from nosocomial Infections.
Nosocomial Infections are, by definition, hospital or clinically acquired.