What are the major groups of microorganisms?
There are five major groups of micro-organisms:
1) Bacteria − They are single celled disease-causing micro-organisms. They can be spiral or rod- shaped.
2) Fungi − They are mostly multicellular disease-causing microbes. Bread moulds are common examples of fungi.
3) Protozoa − They mainly include organisms such as Amoeba, Plasmodium,etc. They can be unicellular or multicellular.
4) Algae − They include multicellular, photosynthetic organisms such as Spirogyra, Chlamydomonas, etc.