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Terms in this set (20)
most common of plagues. bacteria gets into human and aggregates into lymphnoids of humans (armpits, neck, legs) form bubos (areas where blood vessels are damaged and blood is leaking, tissue becomes necrotic: black tissue) stinks, and dies. least infectious of all the plagues. if it goes untreated, it has a 25-50% mortality rate today. can be cured though.
doesnt require flea
caused by the same bacterium, but becomes septisemic and moves in the lungs. lungs fill with bloody fluid. coughing and hacking, arrating fluid from lungs and is highly contagious. can be spread from one human to another without rats or fleas. requires the flee in order to be spread.
100% fatal even today. 1-8 day life expectancy.
542 A.D-664 A.D.
118 years of pandemic
red arrows show the spread, more localized pandemic
began in arabia and spread to egypt and then roman empire and then europe.
100 million people died.
Black Death pandemic
current belief is that the black death plague started in asia and spread across europe and england.
25 million people died. took england 200 years to get back to regular population.
started in SE asia. spread to South africa, south america,
10 million people died, didn't kill as many but a lot
1000-3000 new cases of bubonic disease per year in the world, not gone.
most cases come from the four states that make up the square, colorado, new mexico, etc. prarie dogs spread the bubonic plague. in south america, africa, asia, europe, etc.
named after lyme, ct where first case was documented. 1977. not every case has bullseye rash, but a good sign u have it
25,000 cases per year in US documented.
Lyme disease vectors
ticks (deer and western black leg tick)
transmission of lyme disease
generally adult ticks aren't a vector because it takes 24 hours of attachment in order for the bacterium to get into the human body to have a foothold.
rocky mountain spotted fever
get these red dots all over the body, not located only in the rocky mountains. can get it in south carolina or europe.
-ticks (dog tick, wood tick) more likely to occur than Lyme disease because tick only has to stay attached for 10-20 hours
the female can pass this bacteria onto her offspring. one tick gets infected and soon hundreds and thousands are infected
come in and feed on animal infected by tick, and transfer that infection onto their offspring, etc. etc.
30% mortality rate 250-1200 cases per year.
rabbits don't cause the disease, not the biting flies. dear fly fever
ticks (lone star tick, dog and wood ticks)
spread through animal contact (rabbits and hares)
a disease of northern latitude, goes down to the arctic circle above 20 degrees north
100-200 cases per year in US, bacterial. 7% mortality rate for untreated
rabies do not require
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