Can you explain and give a list of different pathogenic organisms?

Answer 1

An organism of microscopic size, usually a bacteria or virus, that causes disease.

(bacteria, fungi, parasites, and viruses)

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Answer 2

Pathogenic organisms can be a whole range of things, but the most common are your microbes, viruses and fungi.

Microbes are usually bacterial cells and are classified based upon their shape. From here they may be further subcategorized into the kind of effects that they have upon the body. For example, we know that staphylococcus bacteria resemble slightly elongated rods due to their name; the staph- prefix indicates that they appear like a "staff", i.e. long, but the -coccus suffix indicates that they are shaped like "cocci", which literally translates to balls. A further subdivision as indicated above may be the sub-class of Group A ß-hemolytic Staphylococcus Aureus, which is able to cause acute endocarditis (damage to the heart valves). Microbes have a whole range of weaponry that can be used to attack cells, either through endo- or exotoxins produced, or due to byproducts secreted by their metabolism. Certain microbes may also be resistant to the abilities of your lymphocytes to destroy them and may actually be transported via your lymph system to other locations in your body, where they may cause further damage (Mycobacterium Tuberculosis).

Viruses are much, much smaller and have no "conscious" thought - they only seek to replicate themselves in the most efficient method possible, by entering into your cell and changing part of your DNA sequence, the virus actually manages to copy itself millions of times, eventually destroying the cell and spreading many copies of itself, with the ability to infect other surrounding cells. This process continues until your body can successfully fend off the infection - but in some cases, the mechanisms of the virus are so clever that they are able to evade your immune response or even target your lymphocytes with their own mechanisms (HIV).

Finally, Fungi are some of the most scary category based on the way that they are able to infect your body. Essentially, fungal growth in your body can result in a parasitic relationship in which the fungus literally grows in your body, depriving certain areas of much-needed nutrients. Aspergillus infection, whilst rare, is a form of a fungal infection that actively grows in your lungs, destroying lung tissue as it grows.

This is just a very brief listing of a couple of different types of organisms. If you want organisms that result in specific diseases, then let me know which disease or which organisms you're interested in having a bit more of an explanation on.

Answer 3

E.coli