Bacterial pneumonia is an infection of your lungs caused by certain bacteria. The most common one is Streptococcus (pneumococcus), but other bacteria can cause it too. If you’re young and basically healthy, these bacteria can live in your throat without causing any trouble. But if your body’s defenses (immune system) become weak for some reason, the bacteria can go down into your lungs. When this happens, the air sacs in your lungs get infected and inflamed. They fill up with fluid, and that causes pneumonia.

You have a higher risk of getting bacteria pneumonia if you

Are 65 or older

Have other conditions like asthma, diabetes, or heart disease

Are recovering from surgery

Don’t eat right or get enough vitamins and minerals

Have another condition that weakens your body’s defenses

Smoke

Drink too much alcohol

Have viral pneumonia

People who have a weakened immune system also have an increased risk for bacterial pneumonia. These include those who recently had an organ transplant. People who are HIV positive, or who have leukemia, lymphoma, or severe kidney disease also stand a greater chance of developing the infection.

Symptoms

The symptoms can come on fast and furious, or they can creep up on you over a few days. Common symptoms are:

High fever up to 105 F

Coughing out greenish, yellow, or bloody mucus

Chills that make you shake

Feeling like you can’t catch your breath, especially when you move around a lot

Feeling very tired

Low appetite

Sharp or stabby chest pain, especially when you cough or take a deep breath

Sweating a lot

Fast breathing and heartbeat

Lips and fingernails turning blue

Confusion, especially if you’re older

Prevention

There are two kinds of shots for bacterial pneumonia

PCV13 (Prevnar 13) is for

People 65 or older

Kids under 5 years

People who have a high risk of bacterial pneumonia

PPSV23 (Pneumovax) is for

People 65 or older

Children older than 2 who have a high risk of bacterial pneumonia

People between 19 and 64 who smoke or have asthma

Talk to your doctor to find out if you or your child should get a shot.

Besides getting shots, you can lower your risk of getting bacterial pneumonia by doing these things:

Wash your hands regularly, especially after you go to the bathroom and before you eat.

Eat right, with plenty of fruits and vegetables.

Exercise.

Get enough sleep.

Quit smoking.

Stay away from sick people, if possible.

Diagnosis

Your doctor might be able to tell if you have bacterial pneumonia just by examining you and asking questions about your symptoms and general health. They’ll probably listen to your lungs with a stethoscope. That will allow them to hear sounds that show there’s fluid in your lungs. But if they are not sure, you might have to get a chest X-ray.

Some people may need extra tests. These might include

Pulse oximetry (a small gizmo clipped to your finger that checks for enough oxygen in your blood)

Blood tests

Tests of the gunk you cough up (“sputum”)

CT scan to look more closely at your lungs

Treatment

Your doctor probably will prescribe antibiotics. It’s very important that you finish all of these. Otherwise the bacteria may not all be killed and you could get sick all over again. Your doctor might also suggest medication for pain and fever.

Other things you can do to help yourself get better

Get lots of rest.

Drink plenty of fluids (they’ll loosen up the gunk in your lungs so you can cough it out).

Use a humidifier or take a warm bath (more gunk-loosening).

Don’t smoke.

Stay home until your fever goes down and you aren’t coughing anything out.

Most people who are treated for bacterial pneumonia start feeling better in a few days, but it can take a few weeks before you feel 100% better. Make sure you keep your follow-up appointments so your doctor can check your lungs.

If the pneumonia is stubborn or severe, you might have to go to the hospital. If you go to the hospital you might get:

Oxygen treatment

IV fluids and medications

Treatments to help loosen up the gunk