Bacteria Vs Virus Size. Because viruses must infect a host cell to carry out life sustaining functions or to reproduce they are not considered living organisms although some can survive on surfaces for long periods. Bacteria are relatively larger ranging between 0 2 and 2 0 micrometer in diameter the largest bacteria has been shown to be about 750um 0 75mm in diameter.
Therefore in general smaller viruses can be over 200 times smaller when compared to some bacteria. Viruses are usually smaller in seen and are observed using an electron microscope. Because of their small size some viruses are also capable of infecting bacteria.
They have a size of about 20nm to 1000nm maximum.
They are 10 to 100 times smaller than bacteria. Bacteria are single celled organisms that reproduce asexually independently of other organisms. They have a diameter of about 1000 to 2000 nanometres. Bacteria are larger and can be seen with a light microscope.
