Bacteria aur viruses dono hi microscopic (bahut chhote) germs hote hain jo diseases cause kar sakte hain, lekin dono mein kaafi differences hote hain.
Difference between Bacteria and Viruses
Bacteria – Living single-celled organisms
Viruses – Non-cellular infectious agents
| Basis | Bacteria | Viruses |
|---|---|---|
| Structure | Single-celled organisms | Not made of cells |
| Size | Comparatively larger | Much smaller |
| Living nature | Living organisms | Cannot reproduce independently |
| Reproduction | Divide by binary fission | Multiply inside host cells |
| Genetic material | DNA | DNA or RNA |
| Growth | Can grow on suitable nutrient media | Need living host cells |
| Treatment | Antibiotics may work | Antibiotics do not work |
| Examples | E. coli, Salmonella | HIV, Influenza virus |
Examples of diseases
Diseases caused by bacteria:
- Tuberculosis (TB)
- Typhoid
- Cholera
- Bacterial pneumonia
Diseases caused by viruses:
- Common cold
- COVID-19
- Dengue
- AIDS
- Influenza (Flu)
Important points to remember
- Antibiotics work against bacteria, not viruses.
- Vaccines can help prevent many bacterial and viral diseases.
- Bacteria can survive and reproduce independently under suitable conditions.
- Viruses need a host cell to multiply.
Easy trick for exams
Bacteria = Can reproduce independently.
Virus = Needs a host cell to reproduce.
This is the main difference between bacteria and viruses.