Prions

A prion short for proteinaceous infectious particle is an infectious agent which according to the "protein only" hypothesis is composed only of protein.Prions cause a number of diseases in a variety of mammals, including bovine spongiform encephalopathy (BSE aka "mad cow disease") in cattle and Creutzfeldt-Jakob disease (CJD) in humans.All known prion diseases affect the structure of the brain or other neural tissue, and all are currently untreatable and fatal.In general usage, prion can refer to both the theoretical unit of infection or the specific protein (e.g. PrP) that is thought to be the infective agent, whether or not it is in an infective state.
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SARS

SARS (Severe acute respiratory syndrome)
Severe acute respiratory syndrome (SARS) is caused by a new virus that appears to spread easily to others. It can cause serious symptoms and be difficult to treat.
I had given the presentation on this new and hot topics which might be helpful information for all the people who want to know more about this.
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Gangrene

Gangrene :
"The death of body tissue due to the loss of blood supply to that tissue, sometimes permitting bacteria to invade it and accelerate its decay."
This is the presentation given by Swasti on the topics Gangrene.
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Posted by : Swasti