Bacterial infections

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What are bacterial infections?
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 inside our body and on our skin. Bacteria in our intestines (gut) help us to digest our food.
But some bacteria can cause infections. Bacterial infections can affect many parts of your body, including your:

Other causes of infectious diseases are viruses, parasites and fungi.
What are the symptoms of a bacterial infection?
The symptoms of a bacterial infection depend on the location of your infection and the type of bacteria involved.
There are some general signs of bacterial infection:

What causes bacterial infections?
Bacterial infections occur when bacteria enter your body. Once in your body they increase in number. This causes an immune reaction in your body.
Bacteria can enter your body through:

Bacteria can also be transmitted by contact with blood and other bodily fluids.
Bacterial infections and weather events
The risk of getting a bacterial infection increases when you are in contact with flood water. Flood water can come from storms or cyclones.
Touching items affected by flooding can also increase your risk of bacterial infection. You should avoid contact with flood water and practice good hand hygiene. Wash your hands with soap and clean water. If clean water isn’t available, use hand sanitiser.
When should I see my doctor?
Signs that you have a bacterial infection depend on the type of bacteria and the part of your body that is infected. You should see your doctor if you have:

a persistent fever or chills
severe headache or neck stiffness
eye redness and crusting (pus)
persistent ear pain or wetness (discharge)
persistent facial pain and runny nose
difficulty breathing
a persistent cough, or coughing up blood or pus
frequent vomiting and trouble holding liquids down
severe stomach pain
blood or mucus in your poo (stool)
discomfort when urinating (doing a wee) or urine that is smelly, cloudy or contains blood
any abnormal genital discharge
unexplained skin redness or swelling
a skin wound that is red, hot, swollen, or has pus
a rash that doesn’t fade when you press it
difficulty eating or drinking
unexplained weight loss

How are bacterial infections treated?
Serious bacterial infections can be effectively treated with antibiotics. These medicines either kill the bacteria or stop them multiplying. This helps your body’s immune system fight the bacteria.
Your doctor’s choice of antibiotic will depend on the bacteria that is causing your infection.
Antibiotics that work against a wide range of bacteria are called broad-spectrum antibiotics.
Antibiotic resistance is a growing problem so antibiotics must always be used appropriately and as prescribed.
How can bacterial infections be prevented?
Bacterial infections can be highly contagious. Bacterial infections are spread between people through:

Complications of bacterial infections
It’s important to seek treatment because untreated bacterial infections can lead to serious problems. For example, an untreated infected cut can cause cellulitis, a spreading skin infection.
Untreated bacterial infections can sometimes lead to serious, life-threatening conditions.

Septicaemia is a serious blood infection. It is when bacteria enter the bloodstream and cause blood poisoning.
Sepsis is a condition that happens when the body damages its own tissues in response to a bad infection. Sepsis can cause shock, organ failure and death if it’s not treated quickly.

Sepsis is a medical emergency and can be fatal if not treated quickly. If you suspect you or someone else has sepsis, call triple zero (000) for an ambulance.
Ask your doctor ‘Could this be sepsis?’ if:

you are feeling very unwell
you are not getting better from a generalised illness
you are quickly getting worse
there is any chance of an infection
you are more concerned about your child than you normally are when they are sick