lecture22

lecture22 - 20.106J Systems Microbiology Lecture 22 TA:...

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20.106J – Systems Microbiology Lecture 22 TA: Megan McBee ¾ Epidemiology o Microepidemiology o Environmental issues o Also applies to noninfectious diseases, like cancer o We’ll mostly be discussing infection disease today ± Epidemiology: The study of the occurrence, distribution, and control of disease in a population o Testing o Chart: mortality rate per 100,000 in the United States ± The big spike is from the Influenza virus of 1918 ± Mortality has also gotten a little bit worse again in the last 20-30 years ± This recent rise has a lot to do with increased travel ± Epidemiology Vocabulary o Acute – dramatic onset of the illness – they come and go quickly o Chronic – lasts for a long long time, or your entire lifetime. Sometimes you might not have a lot of symptoms o Carrier – somebody that is infected but may not show signs of the illness. They don’t appear sick, and so they act as a human vector. o Reservoir – a carrier of illness. A Carrier is a human reservoir, but often when we talk about reservoirs we mean animals or inanimate places or objects. o Morbidity – the incidence of illness in a population. This involves clinical symptoms, because it won’t get recorded unless people are visibly sick. Thus there is actually more morbidity in a population than gets recorded,
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This note was uploaded on 11/11/2011 for the course BIO 20.010j taught by Professor Lindagriffith during the Spring '06 term at MIT.

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lecture22 - 20.106J Systems Microbiology Lecture 22 TA:...

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