Disease and decay are neither inherent properties of organic objects, nor are caused by physical damage, it is microorganisms that bring about these changes. We are surrounded by bacteria, viruses, and fungi. Many microorganisms cause diseases in cattle, crops and others are known for entering human bodies and causing various diseases.
Examples of familiar human diseases are:
Bacteria: pneumonia, bacterial dysentery, diphtheria, bubonic plague, meningitis, typhoid, cholera, salmonella, meningococcal
Virus: Chickenpox, measles, mumps, German measles, colds, warts, cold sores, influenza
Protozoa: amoebic dysentery, malaria,
Fungi: ringworm, athlete’s foot
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