Mycoplasma pneumonia (patient information)

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Mycoplasma pneumonia


What are the symptoms?

What are the causes?

Who is at highest risk?


When to seek urgent medical care?

Treatment options

Where to find medical care for mycoplasma pneumonia?


What to expect (Outlook/Prognosis)?

Possible complications

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Mycoplasma pneumonia is an infection of the lungs from the bacteria Mycoplasma pneumoniae (M. pneumoniae).

What are the symptoms of mycoplasma pneumonia?

The symptoms are generally mild and appear over a period of 1 to 3 weeks. They may become more severe in some people.

Common symptoms include the following:

Less common symptoms include:

What causes mycoplasma pneumonia?

Mycoplasma pneumonia is a type of atypical pneumonia. It is caused by the bacteria M. pneumoniae. This type of pneumonia usually affects people younger than 40. Various studies suggest that it makes up 15 - 50% of all pneumonia cases in adults and even more in school-aged children.

People at highest risk for mycoplasma pneumonia include those living or working in crowded areas such as schools and homeless shelters, although many people who contract mycoplasma pneumonia have no identifiable risk factor.


Persons with suspected pneumonia should have a complete medical evaluation, including a thorough physical exam and a chest x-ray -- especially because the physical exam may not always be able to tell pneumonia apart from acute bronchitis or other respiratory infections.

Depending on the severity of illness, other tests may be done, including:

A urine test or a throat swab may also be done.

When to seek urgent medical care?

Call for an appointment with your health care provider if you develop a fever, cough, or shortness of breath. While there are numerous causes for these symptoms, you will need to be checked for pneumonia.

Also, call if you have been diagnosed with this type of pneumonia and your symptoms become worse.

Treatment options

Antibiotics that work against Mycoplasma include macrolides, quinolones, and tetracyclines. You can take these steps at home:

  • Control your fever with aspirin, nonsteroidal anti-inflammatory drugs (NSAIDs, such as ibuprofen or naproxen), or acetaminophen. DO NOT give aspirin to children.
  • Do not take cough medicines without first talking to your doctor. Cough medicines may make it harder for your body to cough up the extra sputum.
  • Drink plenty of fluids to help loosen secretions and bring up phlegm.
  • Get a lot of rest. Have someone else do household chores.

Where to find medical care for mycoplasma pneumonia?

Directions to Hospitals Treating Mycoplasma Pneumonia


There is no known way to prevent atypical pneumonia. However, avoiding people who have the infection can help reduce your risk.

Infants, and persons in poor health, especially those with weakened immune systems due to HIV, organ transplants, or other conditions should avoid contact with people who have mycoplasma pneumonia.

What to expect (Outlook/Prognosis)?

Most people recover completely even without antibiotics, although antibiotics may speed recovery. In untreated adults, cough and weakness can persist for up to a month.

Possible complications

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