Differences Between Bacteria and Viruses 4.12/5 (348)

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Differences Between Bacteria and Viruses

Although bacteria and viruses both are very small to be seen without a microscope, there are many differences between Bacteria and Viruses.

Differences Between Bacteria and Viruses

Some of the Differences Between Bacteria and Viruses are as follows:





1SizeLarger (1000 nm)Smaller (20-400 nm)
2Cell WallPeptidoglycan or LipopolysaccharideNo cell wall. Protein coat present instead.
4Number of cellsOne cell (Unicellular)No cells
5Living/Non-LivingLiving organismsBetween living and non-living things.
6DNA and RNADNA and RNA floating freely in cytoplasm.DNA or RNA enclosed inside a coat of protein.
8ReproduceAble to reproduce by itselfNeed a living cell to reproduce
9ReproductionFission- a form of asexual reproductionInvades a host cell and takes over the cell causing it to make copies of the viral DNA/RNA. Destroys the host cell releasing new viruses.
10Duration of illnessA bacterial illness commonly will last longer than 10 days.Most viral illnesses last 2 to 10 days.
11FeverA bacterial illness notoriously causes a fever.A viral infection may or may not cause a fever.
12Cellular MachineryPossesses a cellular machineryLack cellular machinery
13Under MicroscopeVisible under Light Microscope.Visible only under Electron Microscope.
14BenefitsSome bacteria are beneficial (Normal Flora)Viruses are not beneficial. However, a particular virus may be able to destroy brain tumors. Viruses can be useful in genetic engineering.
15TreatmentAntibioticsVirus does not respond to antibiotics.
16ExamplesStaphylococcus aureus, Vibrio cholerae, etcHIV, Hepatitis A virus, Rhino Virus, etc
17Diseases/InfectionsFood poisoning, gastritis and ulcers, meningitis, pneumonia, etcAIDS, common cold, influenza, chickenpox, etc

Differences Between Bacteria and Viruses

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The Author

Sagar Aryal

Sagar Aryal

I am Sagar Aryal, a passionate Microbiologist and the Scientific Blogger. I did my Master's Degree in Medical Microbiology and currently working as a Teaching Assistant at St. Xavier's College, Kathmandu, Nepal. I am particularly interested in research related to Medical Microbiology and Virology. Find me on Facebook, Twitter or Linkedin !!!


Add a Comment
  1. Ellie the omnivorou

  2. Thanks for the great info 🙂

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  4. please I need books on
    therapeutic communication,
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    thanks you

    1. Bio I’m in eighth grade learning this get to my level

  5. very nice sir undrstand essly virus and bactiria

  6. Very nice sr.
    please enter your blogger site

  7. if there is no cell in viruse how does it possible to exis without cell

  8. where da hoes @

  9. how we can dawnload books of microbiology.


  11. Hello Sagar about infection need aclaration for example oral herpes simple y Too abour living respect at the virus your references.
    Thank you

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