Difference Between Bacteria and Viruses

Difference Between Bacteria and Viruses

Bacteria and viruses both differ significantly. Major differences are as follows:



Outer Cell Wall
The bacterial cell wall is made up of peptidoglycan Viruses do not contain a cell wall. The genetic material is enveloped by a protein coat known as a capsid
Bacteria are large in size. The size ranges from 900-1000nm Smaller in size. The size ranges from 30-50nm
They are living organisms They can replicate only within the host cell
Mode of Reproduction
Reproduce asexually by binary fission Insert their genome in the host genome and make multiple copies
Host Dependence
Host independent reproduction Host dependent reproduction
Present Absent
DNA or RNA is present in the cytoplasm DNA or RNA are enveloped inside a protein coat known as a capsid
Generally localised infection, e.g. Pneumonia Generally systemic, e.g. flu
Pneumonia, meningitis, food poisoning, typhoid, etc. Common cold, polio, smallpox, hepatitis, AIDS, etc.
Antibiotics Vaccines and antiviral drugs
Salmonella typheae, Vibrio cholerae, Staphylococcus aureus Coronavirus, TMV, HIV, Hepatitis A, etc

Bacteria and Virus

What is Bacteria?

Bacteria are prokaryotic microorganisms. They are found everywhere. They can survive even the harshest of conditions such as hot springs, deep ocean, snow, and even in the volcanos. Disease-causing bacteria are known as pathogens. Bacteria play a very important role in the ecosystem. They are widely used in the medical and agricultural industries.

What is a Virus?

Viruses are not fully acknowledged as living organisms as they cannot survive outside a host. Anatomically, a typical virus is girdled by a protein coat that is enclosed by a membrane made of proteins. In some viruses, this protein coat is covered by a lipid membrane called the viral envelope.

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