There's no single scientific name for a micro-organism. "Micro-organism" is a general term that refers to any organism that is too small to be seen with the naked eye, including:

* Bacteria: e.g. *Escherichia coli*

* Viruses: e.g. *Influenza virus*

* Fungi: e.g. *Candida albicans*

* Protozoa: e.g. *Plasmodium falciparum*

* Algae: e.g. *Chlamydomonas reinhardtii*

Each of these groups has its own scientific classification system with specific names for individual species.