Transcript Bubonic Plague The Black Death

Bubonic Plague
The Black Death
By: Zach & Amber
Purpose
To simulate the impact of an
epidemic of the plague on a large city in
the Middle Ages.
The Assumptions
• recovered humans would become
susceptible once more.
• rat couldn’t affect humans.
• fleas couldn’t infect rats.
• rats would infect each other.
History
• deadly bacteria that struck 14th century
China and Europe .
• affected rodents
• fleas carried it to humans.
• extremely contagious, spread quickly
• Yersinia Pestis.
Historical Progression of
Bubonic Plague
Symptoms
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shivering
vomiting
headache
giddiness
intolerance to light
pain in back and limbs
white coating on tongue
Internal bleeding
lymph nodes swelled (“buboes”)
Treatmeant & Prevention
• The Bubonic plague is only treatable if it
is caught early on.
• Streptomycin and Tetracyclines is the
preferred drug
• Penicillin is useless on the plague.
• Better sanitary conditions and
precautions.
Vaccine
• Lasts about 6 months.
• Unavailable in the US.
• Treatment shortly after exposure can reduce overall
plague mortality.
• Preferred for children 8 or under.
• rat pop should be controlled using rodenticide.
• isolating all infected human being so that others would
not be affected.
• wearing excrement
• effective insecticides should be used.
Human Model
To tal Hu man popu lati on
Recovered Hu mans
Becomi ng s uscepta ble
In fected flea s
Norma l hu man death rate
Huma n bi rth ra te
Norma l de aths of infe cte d Huma ns
~
Huma n bi rths
Huma n in fection rate
In fected Hu mans
Recovery of huma ns
Sus cep tibl e Huma ns
In fection of huma ns
Norma l hu man deaths
Deaths o f recovered hum ans
Death fro m in fection
Norma l hu man death rate
Norma l hu man death rate
Death rate of infection of h uman s
Rat Model
Li ve births p er fe male rat
Fe male rats
In fected death rate of rats
Rat birth s
In fected rats
In fection of rats
Sus cep tibl e rats
Norma l de aths of rats
Deaths from i nfectio n of rats
In fection rate
Ordin ary dea ths of ra ts
Norma l de ath rate of ra ts
Norma l de ath rate of ra ts
To tal rate popu lati on
Flea Model
To tal flea pop ulation
La rva l stage flea s
Sus cep tibl e fl eas
In fection of flea s
In fected flea s
Death of fle as from i nfectio n
Fl ea b irths
Fl ea g rowth
Norma l Deaths o f fl eas
Death rate of fle as from i nfectio n
Odin ary fle a de aths
~
Fl ea b irth rate
Fl ea i nfectio n rate
Fe male fle as
In fected rats
Norma l fl ea d eath rate
Norma l fl ea d eath rate
Results
Results
Results
References
• http://ponderosapine.uoregon.edu/student/Janis/prevention.html
• model and case study narrative by: Robert R.
Gotwals, Jr. Consulting support by: Dr.. Ken Gage,
Division of Vector-Borne Infectious Disease, Center
for Disease Control, Boulder Colorado. (Case
Study/from Book)
• http://www.byu.edu/ipt/projects/middleages/LifeTimes
/Plague.html
The End