Pneumonia is an illness of the lungs and respiratory system in which the alveoli (microscopic air-filled sacs of the lung responsible for absorbing oxygen from the atmosphere) become inflamed and flooded with fluid. Pneumonia can result from a variety of causes, including infection with bacteria, viruses, fungi, or parasites. Pneumonia may also occur from chemical or physical injury to the lungs, or indirectly due to another medical illness, such as lung cancer or alcohol abuse.
Typical symptoms associated with pneumonia include cough, chest pain, fever, and difficulty breathing. Diagnostic tools include x-rays and examination of the sputum. Treatment depends on the cause of pneumonia; bacterial pneumonia is treated with antibiotics.
Pneumonia is a common illness, occurs in all age groups, and is a leading cause of death among the elderly and people who are chronically ill. Vaccines to prevent certain types of pneumonia are available. The prognosis for an individual depends on the type of pneumonia, the appropriate treatment, any complications, and the person's underlying health.
More on [ Pneumonia ]

Atypical Pneumonia - Causes, symptoms, and treatments of this condition, also called walking pneumonia. Descriptions of the organisms that commonly cause it.
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Bacterial Pneumonia - From the Centers for Disease Control, clinical data collected to discuss the particulars of this pneumonic variant.
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Bacterial Pneumonia - Consumer health resource center providing information on causes, symptoms, and treatment of bacterial pneumonia. From eMedicine Health.
Meta Description: [ Pneumonia is an infection of the lungs. People with pneumonia usually complain about coughing, fever, shortness of breath, and chest pain.
Your body's immune system usually keeps bacteria from infecting ... ]
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Centers of Disease Control and Prevention - Issues, recommendations, appendices, tables and references related to the prevention of nosocomial pneumonia.
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Chemical Pneumonia - Consumer health resource center providing information on the causes, symptoms, and treatment. From eMedicine Health.
Meta Description: [ Chemical pneumonia is an unusual type of lung irritation. Pneumonia usually is caused by a bacteria or virus. In chemical pneumonia, inflammation of lung tissue is from poisons or toxins. ... ]
Dynamics in Healthcare - Information about diagnosis, symptoms and treatment, plus articles.
eMedicine Health - Viral Pneumonia - Consumer health resource center providing information on the causes, symptoms, and treatment of this disorder.
Meta Description: [ Pneumonia is an infection or inflammation of the lungs. It can be in just one part of the lungs, or it can involve many parts. Pneumonia is caused by bacteria, ... ]
Mayo Clinic: Pneumonia - A description of the disease plus complications, risk factors, diagnosis and treatment.
Meta Description: [ There are at least 50 kinds of pneumonia — a serious lung infection that takes the lives of 60,000 Americans every year.
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Medstudents: An Overview - General considerations about pneumonia , giving importance to prevalent agents in different groups of patients.
Meta Description: [ General considerations about pneumonia , giving importance to prevalent agents in different groups of patients. ]
MerckSource - Find diagrams of the lungs and respiratory system and information about pneumonia symptoms.
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Pneumococcal Infections - Recognizing, treating, and preventing infections caused by streptococcus pneumoniae. Consumer information about pneumonia, otitis, bloodstream infections, and meningitis caused by streptococcus pneumoniae. Information about vaccines and antibiotic treatment.
Pneumocystis Carinii Pneumonia (PCP) - Information resources on this common AIDS-related infection and its treatment from TheBody.com.
Postgraduate Medicine: Pneumonia Symposium - Series on community-acquired pneumonia, covering outpatient care, predicting which patients need inpatient or intensive-care treatment, and the lack of specificity in the atypical pneumonia label. Includes discussions of the various pathogens.
Yahoo! Health - Pneumonia - Health encyclopedia with detailed information: definition, causes, incidence, risk factors, symptoms, signs and tests, treatment and prevention.
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