ENST 201 1st Edition Lecture 14 Outline of Last Lecture I Reducing Desired Fertility II MuhammedYunus III Family Planning Outline of Current Lecture I Infectious Diseas a Humans are the habitat for tens of thousands of species b Bacteria live in guts skin et cetera c Typically beneficial but can be harmful d Hunter gatherers were mobile so they tended to not die from disease e Infectious Diseases f We were on the brink of eliminating diseases like small pox polio measles Et cetera but due to some factors mostly political anti vaccinators these diseases are popping up again g In the 19th century people would die from small cuts because there were no antibiotics i Rampant tuberculosis ii Antibiotics were made and for a time things were a lot better however now there is MRSA methicillin resistant staphylococcus aureus and other resistant strains so antibiotics are no longer effective h Things that make us sick i 1 Prions a protein that self replicates that folds in odd ways 1 not treatable 2 highly contagious can get from eating infected tissue nothing can kill them not even heat a example mad cow disease 3 How did humans get it a Mad cow cows were being fed nervous tissue from infected sheep half hearted regulations allow some people to feed these things to their animals and kuru people ate the brains of the deceased ii 2 Viruses are not actually alive needs a host to reproduce virus is a protein with genetic material inside 1 DNA virus genetic material goes into host cell nucleus and hijacks the host easier for society to deal with than RNA virus because RNA viruses mutate a lot DNA mutates much slower much more stable than RNA virus 2 RNA virus mutates very quickly so it is hard to come up with a stable vaccine ex Influenza rhinovirus herpes chickenpox a Retrovirus very tricky to deal with still due to high mutation levels b Kept AIDS from mutating iii 3 Bacteria can persist on fomites there are good and bad bacteria 1 most serious bacterial infections staphylococcus pneumonia tuberculosis E coli 2 WORST is plague
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