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Illness and Conditions - Health Conditions
PneumoniaTopic Overview
What is pneumonia?Pneumonia is a lung infection that can make you very sick. You may cough, run a fever, and have a hard time breathing. For most people, pneumonia can be treated at home. It often clears up in 2 to 3 weeks. But older adults, babies, and people with other diseases can become very ill. They may need to be in the hospital. You can get pneumonia in your daily life, such as at school or work. This is called community-associated pneumonia. You can also get it when you are in a hospital or nursing home. This is called healthcare-associated pneumonia. It may be more severe because you already are ill. This topic focuses on pneumonia you get in your daily life. What causes pneumonia?Germs called bacteria or viruses usually cause pneumonia. Pneumonia usually starts when you breathe the germs into your lungs. You may be more likely to get the disease after having a cold or the flu . These illnesses make it hard for your lungs to fight infection, so it is easier to get pneumonia. Having a long-term, or chronic, disease like asthma , heart disease, cancer, or diabetes also makes you more likely to get pneumonia. What are the symptoms?Symptoms of pneumonia caused by bacteria usually come on quickly. They may include:
When you have mild symptoms, your doctor may call this "walking pneumonia." Older adults may have different, fewer, or milder symptoms. They may not have a fever. Or they may have a cough but not bring up mucus. The main sign of pneumonia in older adults may be a change in how well they think. Confusion or delirium is common. Or, if they already have a lung disease, that disease may get worse. Symptoms caused by viruses are the same as those caused by bacteria. But they may come on slowly and often are not as obvious or as bad. How is pneumonia diagnosed?Your doctor will ask you about your symptoms and do a physical exam. He or she may order a chest X-ray and a blood test . This is usually enough for your doctor to know if you have pneumonia. You may need more tests if you have bad symptoms, are an older adult, or have other health problems. In general, the sicker you are, the more tests you will have. Your doctor may also test mucus from your lungs to find out if bacteria are causing your pneumonia. Finding out what is causing your pneumonia can help your doctor choose the best treatment for you. How is it treated?If pneumonia is caused by bacteria, your doctor will give you antibiotics. These almost always cure pneumonia caused by bacteria. You need to take all of your antibiotics so you get well. Do not stop taking them because you feel better. Take them exactly as your doctor tells you. Pneumonia can make you feel very sick. But after you take antibiotics, you should start to feel much better. Call your doctor if you do not start to feel better after 2 to 3 days of antibiotics. Call your doctor right away if you feel worse. There are things you can do to feel better during your treatment. Get plenty of rest and sleep, and drink lots of liquids. Do not smoke. If your cough keeps you awake at night, talk to your doctor about using cough medicine. You may need to go to the hospital if you have bad symptoms, a weak immune system , or another serious illness. Pneumonia caused by a virus usually is not treated with antibiotics. Sometimes, antibiotics may be used to prevent complications. But home treatment, such as rest and taking care of your cough, usually is all that is done. How can you prevent pneumonia?If you are older than 65, you smoke, or you have a heart or lung problem, you may want to get a pneumococcal vaccine. It may not keep you from getting pneumonia. But if you do get pneumonia, you probably will not be as sick. You can also lower your chances of getting pneumonia by staying away from people who have the flu, colds, measles, or chickenpox. You may get pneumonia after you have one of these illnesses. Wash your hands often. This helps prevent the spread of viruses and bacteria that may cause pneumonia. Frequently Asked Questions
CauseViruses, bacteria, or (in rare cases) parasites or other organisms cause pneumonia .
In people with impaired immune systems , pneumonia may be caused by other organisms, including some forms of fungi, such as Pneumocystis jiroveci (formally called Pneumocystis carinii). This fungus frequently causes pneumonia in people who have AIDS. Some doctors may suggest an HIV test if they think that Pneumocystis jiroveci is causing the pneumonia. TransmissionYou may get pneumonia:
A healthy person's nose and throat often contain bacteria or viruses that cause pneumonia. Pneumonia can develop when these organisms spread to your lungs while your lungs are more likely to be infected, such as during or soon after a cold or if you have a long-term (chronic) illness, such as chronic obstructive pulmonary disease . You can get pneumonia in your daily life, such as at school or work (community-associated pneumonia) or when you are in a hospital or nursing home (healthcare-associated pneumonia). Treatment may differ in healthcare-associated pneumonia because bacteria causing the infection in hospitals may be different from those causing it in the community. This topic focuses on community-associated pneumonia. SymptomsSymptoms of pneumonia caused by bacteria in otherwise healthy people younger than 65 usually come on suddenly. They often start during or after an upper respiratory infection , such as influenza or a cold, and may include:
Symptoms of pneumonia not caused by bacteria (nonbacterial) include fever, cough, shortness of breath, and little mucus when you cough. They may come on gradually and are often less obvious and less severe than those of bacterial pneumonia. Many people don't know that they have nonbacterial pneumonia because they do not feel sick. When symptoms are mild, your doctor may call your condition "walking pneumonia." Older adults and childrenOlder adults may have different, fewer, or milder symptoms, such as no fever or a cough with no mucus (a dry or nonproductive cough). The major sign of pneumonia in older adults may be when there is a change in how clearly they think (confusion or delirium ) or when a lung disease they already have gets worse. In children, symptoms may depend on age:
Conditions that may look like pneumonia include bronchitis , chronic obstructive pulmonary disease (COPD) , and tuberculosis . What HappensAfter you've been infected with a pneumonia-causing organism, it takes as little as 1 to 3 days or as long as 7 to 10 days for symptoms to appear. How severe pneumonia is and how long it lasts depend on:
In healthy people, pneumonia can be a mild illness that is hardly noticed and clears up in 2 to 3 weeks. In older adults and in people with other health problems, recovery may take 6 to 8 weeks or longer. If you have severe pneumonia, you may have to go to the hospital.
If your pneumonia is caused by a virus or bacteria, you may spread the infection to other people while you are contagious. How long you are contagious depends on what is causing the pneumonia and whether you get treatment. You may be contagious for several days to a week. If you get antibiotics, you usually cannot spread the infection to others after a day of treatment. What Increases Your RiskYou are more likely to get pneumonia if you:
You are more likely to have complications of pneumonia and may need to go to the hospital if you:
When To Call a DoctorThe faster you get treatment, the faster you will get over pneumonia . This is especially true for the very young, for people older than 65, and for anyone with other long-lasting (chronic) health problems, such as asthma . Call 911 or other emergency services immediately if you:
Call a doctor immediately if you have:
Call a doctor if your cough:
Also call your doctor if you have new chest pain (more than just discomfort when you cough) that gets worse with deep breathing and if you have other symptoms of pneumonia, such as shortness of breath, cough, and fever. Watchful WaitingWatchful waiting is a wait-and-see approach. If you get better on your own, you won't need treatment. If you get worse, you and your doctor will decide what to do next. Home treatment may be appropriate if:
Who To SeeHealth professionals who can diagnose and treat pneumonia include:
To prepare for your appointment, see the topic Making the Most of Your Appointment. Exams and TestsYour doctor will usually diagnose pneumonia by using your medical history, a physical exam, and a chest X-ray. Based on the medical history and physical exam, your doctor may start your treatment right away without doing other tests. The need for more tests often depends on how severe your symptoms are, your age, and your overall health. In general, the sicker you are, the more tests you will have. This is especially true for older adults and infants. A chest X-ray is almost always done to check for changes in the lungs that may mean pneumonia and to look for other causes of your symptoms. But an X-ray does not always show whether you have pneumonia, especially if the X-ray is done when you first get sick. In some cases, the X-ray results may:
If you are very ill, have severe shortness of breath, or have a condition that increases your risk (such as asthma or chronic obstructive pulmonary disease ), your doctor may examine your mucus.
If you have severe pneumonia, you may need other tests, including tests to check for complications and to find out how well your immune system is working. A urine test is available that may identify within 15 minutes whether you are infected with Streptococcus pneumoniae, one of the main causes of bacterial pneumonia, or Legionella pneumophila, the bacterium that causes Legionnaires' disease and sometimes can cause pneumonia. Although experts consider the test to be useful for the identification of Legionella pneumophila, doctors generally do not use it to identify Streptococcus pneumoniae. 4 But it may be useful in adults with severe pneumonia and when a Gram stain has not identified the bacteria. 5 In people with impaired immune systems , pneumonia may be caused by other organisms, including some forms of fungi, such as Pneumocystis jiroveci (formally called Pneumocystis carinii). This fungus often causes pneumonia in people who have AIDS. Some doctors may suggest an HIV test if they think that Pneumocystis jiroveci is causing the pneumonia. Treatment OverviewDoctors use antibiotics to treat pneumonia caused by bacteria, the most common cause of the condition. The number of days you take antibiotics depends on your general health, how serious your pneumonia is, and the type of antibiotic you are taking. Your doctor will choose your antibiotic based on a number of things, including your age, your symptoms and how severe they are, and whether you need to go to the hospital. Although experts differ on their antibiotic recommendations, the first antibiotic used usually is one that works against a wide range of bacteria (broad-spectrum antibiotic). All antibiotics used have a high cure rate for pneumonia. 6 If you do not have to go to the hospital, your doctor may use any of the following antibiotics:
If you have to go to the hospital, your doctor may use any of the above antibiotics. Other antibiotics that your doctor may use in this situation include:
Antibiotics usually work well with younger, otherwise healthy people who have strong immune systems. You most likely will see some improvement in symptoms in 2 to 3 days. Unless you get worse during this time, your doctor usually will not change your treatment for at least 3 days. If there is no improvement or if your symptoms get worse, you may need culture and sensitivity testing . These tests help identify the organism that is causing your symptoms. These tests also help your doctor find out whether the bacteria may be resistant to the antibiotic. You likely will not have to go to the hospital unless you:
Viral pneumoniaPneumonia also can be caused by viruses, such as those that cause influenza (flu) and chickenpox (varicella).
What To Think AboutIf you do not need to go to the hospital for pneumonia, it is not usually necessary to identify the organism causing the pneumonia before starting treatment. If you do go to the hospital, you will probably have some testing to identify the bacteria. Getting started early on antibiotics leads to better recovery, especially in those age 65 and older who have severe symptoms. 6 In most cases pneumonia is a short-term, treatable illness. But frequent bouts of pneumonia can be a serious complication of a long-term (chronic) illness, such as chronic obstructive pulmonary disease (COPD). If you have a severe long-term illness, it may be difficult to treat your pneumonia, or you may choose not to treat it. You and your doctor should discuss this. This discussion may include the possibility of your creating an advance directive . For more information, see the topic Writing an Advance Directive or Care at the End of Life. PreventionThere are a number of steps you can take to help prevent getting pneumonia .
VaccinationsVaccines to help prevent pneumonia are available. But research shows that they might not help everyone. The vaccine for children is called the pneumococcal conjugate vaccine (PCV) (What is a PDF document?) . The vaccine for older adults is called the pneumococcal polysaccharide vaccine (PPSV) (What is a PDF document?) . Some studies show that the vaccine does not reduce the risk of pneumonia in adults. But the vaccine can prevent some of the serious complications of pneumonia, such as infection in the bloodstream (bacteremia) or throughout the body (septicemia), in younger adults and those older than 55 years with a healthy immune system. 7 Experts recommend the vaccine for people who are older than 65, for adults who smoke, and for people who have a long-lasting (chronic) condition that increases their risk of pneumonia. Other vaccines can prevent common diseases in which pneumonia may be a complication.
The mineral zinc may help reduce the risk of pneumonia in children. Zinc can be found in certain foods (lean red meats, seafood, beans, cereals) or added to the diet in supplements. Studies in developing countries found that the incidence of pneumonia in children dropped when zinc was added to the diet. 8 Always talk to your doctor before giving your child zinc supplements or any other vitamin or mineral supplement. Home TreatmentHome treatment is important for recovery from pneumonia . The following measures can help you recover and avoid complications, such as further infection or a buildup of fluid in the space between the lung and chest wall ( pleural effusion ). While you are at home:
Do not give cough and cold medicines to a child younger than 2 unless your child’s doctor has told you to. If your child’s doctor tells you to give a medicine, be sure to follow what he or she tells you to do. Always check whether any over-the-counter cough or cold medicines you are taking contain acetaminophen. If they do, make sure the acetaminophen you are taking in your cold medicine, plus any other acetaminophen you may be taking, is not higher than the daily recommended dose. Ask your doctor or pharmacist how much you can take every day. Your doctor may want to see you after a week of treatment to make sure you are getting better. Be sure to contact your doctor if you do not feel better, your cough gets worse, you have shortness of breath or a fever, you feel weak, or you feel faint when you stand up. MedicationsDoctors use antibiotics to treat pneumonia caused by bacteria. Your doctor chooses an antibiotic after considering:
Your doctor's choice of antibiotics may also depend on whether you:
Medication ChoicesAlthough experts differ on their recommendations, the first antibiotic used is usually one that kills a wide range of bacteria (broad-spectrum antibiotic). All antibiotics used have a high cure rate for pneumonia. 6 If you do not have to go to the hospital, your doctor may use any of the following antibiotics:
If you have to go to the hospital, your doctor may use any of the above antibiotics. Other antibiotics that your doctor may use in this situation include:
What To Think About
SurgeryThere is no surgical treatment for pneumonia . Other TreatmentIn most cases of pneumonia in young, otherwise healthy people with strong immune systems , treatment can be done at home. Antibiotics, rest, fluids, and home care are all that you need in order to recover. But people who are having trouble breathing or have other lung problems may need more treatment. Sometimes you may need oxygen or medicines you breathe using an inhaler or nebulizer to help shortness of breath and wheezing symptoms. If pneumonia does not improve with home treatment, symptoms get worse, or signs of complications of pneumonia develop, you may have to go to the hospital. Hospital treatment for pneumonia may include:
Other Places To Get HelpOrganization
Related InformationReferences
Credits
Last Updated: March 18, 2009 Niederman MS (2004). Pneumonia, including
community-acquired and nosocomial pneumonia. In JD Crapo et al., eds.,
Baum's Textbook of Pulmonary Diseases, 7th ed., vol. 1,
pp. 424–454. Philadelphia: Lippincott Williams and Wilkins.
File TM Jr (2003). Community-acquired pneumonia.
Lancet, 362(9400): 1991–2001.
Laheij RJF, et al. (2004). Risk of community-acquired
pneumonia and use of gastric acid-suppressive drugs. JAMA, 292(16): 1955–1960.
Smith MD, et al. (2003). Rapid diagnosis of bacteremic
pneumococcal infections in adults by using the binax NOW Streptococcus pneumoniae urinary antigen test: A prospective,
controlled clinical evaluation. Journal of Clinical Microbiology, 41(7): 2810–2813.
Rosón B, et al. (2004). Contribution of a urinary
antigen assay (binax NOW) to the early diagnosis of pneumococcal pneumonia.
Clinical Infectious Diseases, 38(2):
222–226.
Loeb M (2008). Community-acquired pneumonia, search
date June 2007. Online version of BMJ Clinical Evidence:
http://www.clinicalevidence.com.
Moberley SA, et al. (2008). Vaccines for preventing
pneumococcal infection in adults. Cochrane Database of Systematic Reviews(1). Oxford: Update Software.
Bhandari N, et al. (2002). Effect of routine zinc
supplementation on pneumonia in children age 6 months to 3 years: Randomised
controlled trial in an urban slum. BMJ, 324(7350):
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McIntosh K (2002). Community-acquired pneumonia in children. New England Journal of Medicine, 346(6): 429–437.
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