Saturday, April 13, 2013

Speech on different pathogens and the diseases they cause.

Hello Everyone. Im here to talk about the difference between prions, viruses, bacteria, protozoans, kingdom Fungi and macro-parasites. These ar all pathogens that make believe diseases. I will too be giving examples of the diseases that these pathogens cause.

Prions are infectious agents which do non have a nucleic acid genome. Prion diseases are often called spongiform encephalopathies (mad cattle disease) because of the post mortem appearance of the brain with large vacuoles in the lens cortex and cerebellum. Prion proteins are found in two forms, the wild instance form (PrPc) and the mutant form (PrPsc). Once the protein that has been altered from its dominion structure it can alter other proteins to form more than prions. Examples of the diseases they cause are:

Scrapie in sheep

Chronic wasting disease in mule deer

Creutzfeld-Jacob disease in humans &

Alpers syndrome in humans

The 1st outline is of the difference between normal protein sheep pen and prion protein folding. The 2nd picture is of a hamster prion.

Viruses are non-cellular (non-living) infectious agents consisting of a single type of nucleic acid (either RNA or DNA) meet by a protein coat. Some viruses have an additional bottom around this coat called an envelope. Viruses are generally specific for a given host, although all organisms are susceptible to viral attack. in that location are thousands of diverse viruses that come in a soma of shapes.

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Many are polyhedral , or multi-sided. Other viruses are shaped like spiky ovals or bricks with rounded corners. Examples of the diseases they cause are:

Influenza

Measles

AIDS

Hepatitis &

Foot and mouth disease

The 1st picture is of the different structures. The 2nd picture is of the inside of a virus. The 3rd picture is of an actual virus.

Bacteria consist of only a single cell, with no internal membranes. Bacteria have been found...

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