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Epidemics Grade 7 ISP

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by

Siyuan Pan

on 11 April 2013

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Transcript of Epidemics Grade 7 ISP

Epidemics The worst type of infectious disease known to mankind By Siyuan Pan What are Epidemics considered to be from the past and present and why? What is an epidemic? How have Epidemics in Today's state Evolved compared to their state in the past? What are some main epidemics from the past and present? And now, A bit of history... How is how technology keeping up related to how the diseases evolve in lethalness? Cholera - Epidemics considered same thing throughout history - 7 major breakouts in history
- Each caused a lot of damage 1. 1817 - 1823, 100,000 died in Java. 2. 1829 - 1849, 52000 died in the second respark. 3. 1852 - 1859, worst year is 1854. 4. 1863 - 1879. 90, 000 died in Russia. 5. 1881 - 1896. 200, 000 Russia deaths, 90,000 Japan deaths.* 6. 1899-1923. Killed 800,000+ in India. 7. Originated in Indonesia. Still continues today. The 7 Outbreaks of Cholera Tuberculosis - TB Epidemic organism discovered 17,000 years ago
- Discovered in Egypt, India and China
- Also occured during the Middle Ages. SARS - Began in Guang Dong, China in November 2002
- Infected 8,273 and killed 775
- transmitted to humans through bats Smallpox - Earliest possible evidence of Smallpox is on Rameses V Black Death/Bubonic Plague/Black Plague - originally a flea transmitted disease
- Fleas hid in rat fur HIV/AIDS - general belief is HIV descends from SIV - HIV1 believed to have originated between 1884 - 1924.
- Little is known about HIV2 - All 8 epidemics I'm studied have been weakened
- Eg. SARS lasted for 9 months What are we doing that affect the diseases in any way? Affects to the Body Did any of the Epidemics die out? - Only epidemic eradicated from my list: Smallpox
- Human to Human transmittion of SARS may return
- Black Death nearly Eradicated Effects of Tuberculosis Effects of SARS Effects of Smallpox HIV/AIDS Black Death Yellow Fever Malaria Yellow Fever - RNA disease inside a mosquito - First recorded outbreak was during the 17th century

- Famous for it's epidemic attack in 1793 in Philadelphia Malaria - Believed to originate in North-Eastern China, 1330s
- May have killed 1/3 of the population Spreading - First evidence is discovered in 1770, and by 1771 MOSCOW was suffering from the last deadly outbreak in history
- The nobility and rich tried to protect themselves
- Archbishop Ambrosius of Moscow tried to stop the plague from spreading by quarantining an icon called the virgin mary of Boglyubovo.
- However, by now, this had escalated further the protests that were happening everywhere, and the Archbishop was murdered on September 16th.
- Cold weather FINALLY put an end to the plague, and over 20,000 died. Outbreaks "We have done what we could. Yet sometimes, we aren't enough." - 1815, TB was responsible for 1/4 of England's deaths
- early 1800s, 900 of 100, 000 died (Western Europe)
- known as the white plague - Originated from organism that lived in aquatic marine animals
- adapted to living inside aquatic insects
- First parasites developed two-host life cycles Outbreaks and history - earliest traces came from China - Americans devastated by Malaria when Europeans came - Europe gained some resistance, but any other countries exposed were devastated
- Spanish conquistadors devastated Central and South America in 1500s What will the future of these diseases be? - However, sometimes vaccines may not be enough


-Plus, at our development rate, possible disease mutation The Future is uncertain. - Major issue is overpopulation
- Especially large issue, obviously, for developing countries
- Vaccines may not reach everyone in time - Disease that heavily affects an area
- NOT to be confused with Pandemics
- Pandemic is a worldwide disease - Epidemic is if area affected beyond expectations, affecting many at the same time
- Outbreak is the sudden rise of a disease
- Outbreak is essentially a case of the epidemic Outbreak or Epidemic? 1 2 3 4 5 6 7 - Portuguese exploration devastated West Africa - No significant changes for Epidemics over the years






- Epidemics have used their surroundings to their advantages What are we ourselves doing:
- polluting the air

What we didn’t mean to do:
- people living in developing countries and overpopulation 50 Million 1 million 1959: First case of death by HIV 1981: Kaposi's Sarcoma and Pneumocystis was reported among gay american men 1984: Canadian flight attendant believed to have spread HIV to the public dies of AIDS 8000 US cases, 3700 deaths 1987: 100, 000 - 150, 000 cases of HIV/AIDS 1990: 1,000,000 + people live with AIDS 2005: 4.9 million infected with HIV, and 40.3 million were living with it 2007: CDC says 565, 000+ people have died of AIDS - The Black Death was originally a flea transmitted disease
- In time, the fleas began to hide inside rat fur
- The rats needed water, so they migrated to cities
- When the rats moved onto ships, the sailors were infected
- When the ships arrived at a town, the citizens tried to get them away, but often it was too late - Believed to have started first in North-Eastern China in the 1330s
- Chinese writers wrote about a horrible disease that from evidence today may have killed 1/3 of the population there
- When traders/warring armies traveled, the disease went with them
- It finally reached Europe in 1346. - In 1347, the Black Death entered Europe through the gate of Constantinople
- Because of the rapid transmission, the disease was soon in Northern Europe by December of 1348
- Northern England was infected in June 1349, and Norway in May 1349
- The disease spread in 1352 to Moscow, North Africa, and the Middle East after stopping in Europe at the very beginning of 1351
- Europe had lost 25 - 40 million, around a third of their entire population, similar to China. It has begun! - Returned to London in a hot summer of 1665, and much of London was filthy and lived in squalor (Meaning dirty and filthy places)
- These conditions were the perfect breeding conditions for rats
- The first victims were from the poorer areas of London and couldn’t avoid it due to poor hygiene
- Londoners were paid even to kill cats and dogs, which were thought to spread the black death
- The plague ended during the 1666 Great Fire of London, burning off the infected areas and stopping the tragedy with a tragedy - Back again in 1720 of a place called Marseilles
- Killed 30, 000 to 40, 000 of 80,000 to 90,000 citizens.
- Cargo ship taking off spread the disease to this city, and by July 9th, 1720, the plague was confirmed present
- In 1722, the deadly plague finally stops Returning... It's gone? No not yet... One...Final...Attack... Preventing Epidemics 1. Hygiene.

2. Keep track of news.

3. If traveling, know if your country may contain this epidemic.

4. Keep your body healthy.

5. Don't panic.

6. Be aware and spread the word. http://www.youtube.com/watch?v=OHjGaeXciR4 MALARIA Black Death Tuberculosis Yellow Fever SARS Small Pox
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