Introduction

Specific characteristic of microorganisms:

  1. Microscopic dimension
  2. Very small to be seen by naked eye
  3. Diameter:0.1 mm or less

Microorganisms that exist in nature can be grouped under following:

  1. Virology : study of viruses
  2. Bacteriology : study of bacteria
  3. Mycology: study of fungi
  4. Phycology: study of algae
  5. Protozoology: study of protozoa
  6. Nematology: study of nematodes