mad cow disease n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Mad Cow Disease----- PowerPoint Presentation
Download Presentation
Mad Cow Disease-----

Loading in 2 Seconds...

play fullscreen
1 / 18

Mad Cow Disease----- - PowerPoint PPT Presentation


  • 329 Views
  • Uploaded on

Mad Cow Disease-----. -- The Past History of Mad Cow Disease -- All about Mechanisms -- Other analogous diseases -- Great impact Mad Cow Disease Had Caused B9202066 湛茗任 B9202097 藍士耘 B9202099 魏士傑 B9202101 龔瑋翔. The Past History Of Mad Cow Disease. Early history in 1913

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Mad Cow Disease-----' - leigh-woodard


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
mad cow disease
Mad Cow Disease-----

-- The Past History of Mad Cow Disease

-- All about Mechanisms

-- Other analogous diseases

-- Great impact Mad Cow Disease Had Caused

B9202066 湛茗任

B9202097 藍士耘

B9202099 魏士傑

B9202101 龔瑋翔

the past history of mad cow disease
The Past History Of Mad Cow Disease
  • Early history in 1913
  • 1957 Carleton Gajdusek in New Guinea
  • 1976 Nobel Prize in Medicine
  • 1982 Stanley B. Prusiner’s experiment
  • 1997 Nobel Prize in Medicine
slide3
Before introducing the early history of Mad Cow

Disease, we sincerely hope all of you know ……

Mad cow diseaseCow

= Creutzfeldt-Jakob disease&KuruMen

= ScrapieSheep

early history in 1913
Early History in 1913

1. The story of Dr.Creutzfeldt

2. The story of Dr.Jakob

1957 carleton gajdusek in new guinea
1957 Carleton Gajdusek in New Guinea

About “Kuru” ………….

what causes mad cow disease
What Causes Mad Cow Disease
  • In 1982,Stanley B. Prusiner purified the pathogen of mad cow disease in his laboratory.
  • He found that the pathogen was composed of a kind of protein and named it proteinaceous infectious particle.
slide8
Actually, there are two kinds of prion, PrPc and PrPsc
  • PrPc can be found in the brain of normal, health animals and does not cause diseases.
  • PrPsc is the prion that causes diseases.
slide9
The polypeptides that form PrPc and PrPsc are the same, but PrPsc is misfolded. The main secondary structure of PrPc is α-helix while that of PrPsc is β pleated sheet.
  • PrPsc can convert the PrPc it meets to the malady-caused structure.
slide11
PrPsc can be metabolic and will be stored in the neuron of the brain then kill the cell.
  • If too many neurons are exterminated, the brain will lose it’s original function and the symptons of the disease appears.
how do mad cow disease spread
How Do Mad Cow Disease Spread?
  • In order to made cows grow better, people mixed the powder of bones they got after slaughtering with feed.
  • While making sheep bone powder, the prion that caused scrapie was mixed with it and then eaten by cows.
  • Prion won’t be decomposed in the stomach and intestine, and will be absorbed and transported into the brain.
diseases related to the prion tses transmissible spongiform encephalopathies

Diseases related to the Prion (TSEs)Transmissible Spongiform Encephalopathies

Kuru

CJD (Creutzfeld-Jacob Disease)

Scrapie

diseases related to the prion tses
Diseases related to the Prion (TSEs)
  • GSS (Gerstmann - straussler syndrom )

遺傳性PrP基因突變

  • CWD (Chronic wasting disease ) 狂鹿症
  • FFI (Fatal familial Insomnia) 致命家族失眠症
chain reaction
Chain Reaction

Wheat

Cattle

Corn

Beans

Beef

Fast Food

Cream

influence
Influence
  • Stock Market
  • Exchange Rate
  • Livestock Breeding
  • Biotechnology and Medicine Industry
epidemic
Epidemic
  • Quarantine
  • Kill All!!!
  • Globalization?