Those gutless microorganisms. Just Say No to Abuse Declaring War on Terrorism. Those gutless microorganisms.
Bacteria are much larger than viruses.
They range in size from 1 micron to 200 microns. A good place to see the difference in sizes can be found at Cells alive . There you can see that bacteria are about 10 times bigger than viruses. Bacteria are still quite small and require the aid of a microscope to see the individual organisms. There can be up to one billion cells in a colony.