While both bacteria and viruses can cause mild to serious infections, they are different from each other. You must understand this difference, because bacterial and viral infections must be treated differently. Misusing antibiotics to treat viral infections contributes to the problem of antibiotic resistance.
Bacteria versus viruses
Bacteria and viruses are too tiny to be seen by the naked eye. Bacteria and viruses can cause similar symptoms and are often spread in the same way, but bacteria and viruses differ in their structure and their response to medications.
A bacterium is a single, but complex, cell. It can survive on its own, inside or outside the body.
Most bacteria aren’t harmful. In fact, we have many bacteria on and inside our body, especially in the gut to help digest food.
Viruses are smaller and are not cells. Unlike bacteria, viruses need a host such as a human or animal to multiply. Viruses cause infections by entering and multiplying inside the host’s healthy cells.
Bacterial infection versus viral infection
As the names suggest, bacteria cause bacterial infections, and viruses cause viral infections.
It is important to know bacteria or viruses cause an infection, because the treatments will differ. Examples of bacterial infections include whooping cough, strep throat, ear infection and urinary tract infection (UTI).
Viral infections include the common cold, flu, most coughs and bronchitis, chickenpox and HIV/AIDS.
It can be difficult to know what causes an infection, because viral and bacterial infections can cause similar symptoms. Your doctor may need a sample of your urine, stool or blood, or a sample from your nose or throat to see what sort of infection you have.
Treatment of bacterial and viral infection
Bacterial infection treatment
Doctors usually treat bacterial infections with antibiotics. These medicines either kill bacteria or stop them multiplying.
But since antibiotic resistance is a growing problem, antibiotics may be prescribed only for serious bacterial infections.
Viral infection treatment
The treatment of viral infections can include:
- managing symptoms, such as use honey for coughs and give warm fluids like chicken soup for oral hydration
- paracetamol to relieve fever
- stopping viral reproduction using antiviral medicines, such as medicines for HIV/AIDS and cold sores
- preventing infection in the first place, such as vaccines for flu and hepatitis
Remember: Antibiotics won’t work for viral infections.