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At Healthfully, we strive to deliver objective content that is accurate and up-to-date. Our team periodically reviews articles in order to ensure content quality. The sources cited below consist of evidence from peer-reviewed journals, prominent medical organizations, academic associations, and government data.
- BMC Medical Informatics and Decision Making: Identification of Pneumonia and Influenza Deaths Using the Death Certificate Pipeline
- BMC Medical Informatics and Decision Making: Identification of Pneumonia and Influenza Deaths Using the Death Certificate Pipeline
- The Journals of Gerontology Series A: Epidemiology and Management of Common Pulmonary Diseases in Older Persons
- The Journals of Gerontology Series A: Epidemiology and Management of Common Pulmonary Diseases in Older Persons
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Clinical Manifestations of Pneumonia
Worldwide, pneumonia kills more people than any other infectious disease 1. In the U.S. alone, each year pneumonia accounts for more than 1 million hospitalizations. A variety of microorganisms, including bacteria, viruses and fungi, can infect your lungs and cause pneumonia, and these different organisms can lead to somewhat different signs and symptoms. The clinical manifestations of pneumonia -- the clues a doctor uses to diagnose the disease -- may be influenced by your age or underlying medical conditions 2.
If you are experiencing serious medical symptoms, seek emergency treatment immediately.
Typical Signs and Symptoms
Like other types of infection, pneumonia can trigger fever, chills, rapid heart rate, body aches and weakness. Because pneumonia affects your lungs, it typically causes rapid breathing and a cough, which may or may not produce phlegm. The phlegm may be clear, yellow, greenish or blood-tinged. Pleuritic pain -- sudden, sharp chest pain when you inhale -- is common in people with pneumonia. When listening to your lungs, your doctor may hear crackles, pops, wheezes or other unusual sounds from the infected lung, and the breath sounds on one side may be quieter than the other.
- Like other types of infection, pneumonia can trigger fever, chills, rapid heart rate, body aches and weakness.
- Because pneumonia affects your lungs, it typically causes rapid breathing and a cough, which may or may not produce phlegm.
X-Ray and Laboratory Evaluation
Symptoms of Bronchial Pneumonia
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Although your doctor may suspect you have pneumonia based on your symptoms and a physical examination, a chest x-ray is usually needed to confirm the diagnosis. Depending on the organism involved, your x-ray may show a focal infiltrate, which shows up as an abnormal bright area in one region of your lung, or it could simply reveal nondescript haziness throughout your lungs. There might be fluid at the base of one or both lungs, which is often a sign of bacterial pneumonia.
Laboratory tests are not needed to diagnose pneumonia, but they may help gauge the severity of your infection or identify a specific organism. An elevated white blood cell count is common with pneumonia, but people with pneumonia often have normal white counts. A low blood glucose level or decreased blood oxygen level may signify severe infection and an increased risk for complications. Blood and sputum cultures, nasal swabs or urine or blood antigen tests may pinpoint a particular infectious agent, which can guide therapy.
- Although your doctor may suspect you have pneumonia based on your symptoms and a physical examination, a chest x-ray is usually needed to confirm the diagnosis.
- Depending on the organism involved, your x-ray may show a focal infiltrate, which shows up as an abnormal bright area in one region of your lung, or it could simply reveal nondescript haziness throughout your lungs.
Atypical Symptoms
Some people with pneumonia, particularly the elderly, may not have typical symptoms. Older people may not develop the fever, chills or cough that typically accompany pneumonia, according to a March 2012 review in “The Journals of Gerontology.” Rather, they may have symptoms mistakenly attributed to aging, such as confusion, disorientation, loss of appetite or falling.
While infants and young children with pneumonia typically have a cough and fever, they may also have grunting, nasal flaring, increased respiratory rate and retractions, which are inward movements of the spaces between the ribs and above the collarbone when they inhale. Rapid breathing is a useful diagnostic sign in children with pneumonia, but any illness that causes fever can trigger rapid breathing in children.
Certain types of pneumonia, such as Legionnaires' disease, may manifest with atypical symptoms, such as severe headache, confusion or diarrhea. If your doctor is not aware you have been exposed to an unusual infectious agent, your diagnosis could be delayed. If you have an underlying medical condition, such as heart failure, sudden shortness of breath could wrongly be attributed to worsening of your heart condition, rather than pneumonia.
- Some people with pneumonia, particularly the elderly, may not have typical symptoms.
- Rather, they may have symptoms mistakenly attributed to aging, such as confusion, disorientation, loss of appetite or falling.
Considerations
What Is Basilar Consolidation?
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Although pneumonia is easily recognizable in most people, there is no specific set of clinical manifestations that can diagnose or rule out pneumonia in all cases. When evaluating a person for pneumonia, the doctor must be aware of the types of illnesses circulating in the community and pursue any possible exposures to unusual agents while keeping the unique characteristics of each patient in mind. If you think you or a family member have pneumonia, see your doctor promptly for an evaluation.
Related Articles
References
- Centers for Disease Control and Prevention: Pneumonia Can Be Prevented –- Vaccines Can Help
- BMC Medical Informatics and Decision Making: Identification of Pneumonia and Influenza Deaths Using the Death Certificate Pipeline
- American Family Physician: Diagnosis and Management of Community-Acquired Pneumonia
- The Journals of Gerontology Series A: Epidemiology and Management of Common Pulmonary Diseases in Older Persons
- American Family Physician: Community-Acquired Pneumonia in Children
- Almirall J, Serra-prat M, Bolíbar I, Balasso V. Risk factors for community-acquired pneumonia in adults: a systematic review of observational studies. Respiration. 2017;94(3):299-311. doi:10.1159/000479089
- Komiya K, Ishii H, Kadota J. Healthcare-associated Pneumonia and Aspiration Pneumonia. Aging Dis. 2014;6(1):27–37. doi:10.14336/AD.2014.0127
- Frantzeskaki F, Orfanos SE. Treating nosocomial pneumonia: what's new. ERJ Open Res. 2018;4(2):00058-2018. doi:10.1183/23120541.00058-2018
- American Lung Association. Pneumonia symptoms and diagnosis. Updated May 27, 2020.
- Morris DE, Cleary DW, Clarke SC. Secondary bacterial infections associated with influenza pandemics. Front Microbiol. 2017;8:1041. doi:10.3389/fmicb.2017.01041
- Chughtai M, Gwam CU, Mohamed N, et al. The epidemiology and risk factors for postoperative pneumonia. J Clin Med Res. 2017;9(6):466–475. doi:10.14740/jocmr3002w
- Garin N, Marti C, Scheffler M, Stirnemann J, Prendki V. Computed tomography scan contribution to the diagnosis of community-acquired pneumonia. Curr Opin Pulm Med. 2019;25(3):242–248. doi:10.1097/MCP.0000000000000567
- Mantero M, Tarsia P, Gramegna A, Henchi S, Vanoni N, Di Pasquale M. Antibiotic therapy, supportive treatment and management of immunomodulation-inflammation response in community acquired pneumonia: review of recommendations. Multidiscip Respir Med. 2017;12:26. doi:10.1186/s40248-017-0106-3
- Principi N, Esposito S. Prevention of community-acquired pneumonia with available Pneumococcal vaccines. Int J Mol Sci. 2016;18(1):30. doi:10.3390/ijms18010030
- Mayo Clinic Staff. Pneumonia. Mayo Clinic. Updated March 13, 2018.
- National Heart, Lung, and Blood Institute. Pneumonia. National Institutes of Health. U.S. Department of Health & Human Services.
Writer Bio
Stephen Christensen started writing health-related articles in 1976 and his work has appeared in diverse publications including professional journals, “Birds and Blooms” magazine, poetry anthologies and children's books. He received his medical degree from the University of Utah School of Medicine and completed a three-year residency in family medicine at McKay-Dee Hospital Center in Ogden, Utah.