Textbook Notes (290,000)
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Chapter 9

HLTB21H3 Chapter Notes - Chapter 9: Characters In Romeo And Juliet, Benjamin Jesty, Cutaneous Condition


Department
Health Studies
Course Code
HLTB21H3
Professor
Caroline Barakat
Chapter
9

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Prashanthan Oct/25/2012
1
Smallpox
Ch.9
1520 Expedition arrived from Spanish Cuba to Aztec Empire
o A slave-member in crew had smallpox
o Spread from village to village
Indiscriminate disease
o Affects everyone regardless of class, social status, wealth, etc
A Look Back
Suspected that humans acquired infectious agent from pox-like disease of domesticated animals
during agricultural revolution
Africa/India West of China
Known in Greece, but not a health threat until the Plague of Antonius
Contributed to the settlement of North America by the French and English
1763 English used as weapon of germ warfare against Indians
o Blankets/Hankerchiefs deliberately contaminated by English, and sent to India to start
epidemic, and ensured the Indians’ defeat in the war
The Disease of Smallpox
Caused by virus
Enters body via inhalation OR direct contact/thru contaminated formites (inanimate objects)
Multiplies in mucous membrane of nose and mouth
Individual is infectious a day before rash appears until all scabs have fallen off
Many die few days/week after rash appears
Infection results in destruction of skin’s elasticity, leaving permanent crater-like scars
o Pockmarks
2 types
o Variola major more deadly
o Variola minor less fatal
o Differ in their genetic material slightly
“Catching” Smallpox
Contagious
Spread from person to person (no animal reservoirs)
Since it is so contagious, it requires a large number of susceptible humans to exist in a
community
Spreads more rapidly during winter in temperate climates and during dry season in tropics
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