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==Introduction==

==Introduction==

 

Infectious agents are microorganisms found in nature that

<nowiki>Infectious agents are microorganisms found in nature that

are harmful to animals and plants. Most microorganisms found in nature are not

are harmful to animals and plants. Most microorganisms found in nature are not

harmful, however some microorganisms can cause disease and are therefore

harmful, however some microorganisms can cause disease and are therefore

categories of veterinary interest are bacteria, fungi, protozoa, viruses and

categories of veterinary interest are bacteria, fungi, protozoa, viruses and

prions, although a wide array of other microorganisms also exist such as algae.

prions, although a wide array of other microorganisms also exist such as algae.