The pathogenic organisms are not considered animals at all. The three pathogenic organisms are virus, bacterium, and fungus. All of these can potentially cause illness in animals and humans.

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The organisms that are in your intestines are not normally pathogenic but can be if they get into the wrong places such as your urinary tract or inside your body cavity if you have a ruptured appendix.

Two ways that pathogenic organisms can cause infection and disease is by producing poison and to attack and destroy the living cells they intrude.

pathogenic waste contains disease causing micro organisms. hospital waste usually contains infectious microorganisms.