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Pneumonia is an infection of the lungs. Many different organisms can cause it, including bacteria, viruses, and fungi.Pneumonia is a common illness that affects millions of people each year in the United States.Bacterial pneumonias tend to be the ...
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The most common mechanism by which the lung is inoculated with pathogenic organisms is through microaspiration of oropharyngeal contents, a process that occurs in otherwise healthy individuals during sleep ( Chapter 82 ). Colonization of the oral pharynx with pathogenic organisms, such as Streptococcus pneumoniae ( Chapter 303 ), can thereby lead to delivery of sufficient quantities of organisms to infect the lung.
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Pneumonia is an infection of the lung, and can be caused by nearly any class of organism known to cause human infections. These include bacteria, viruses, fungi, and parasites.
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Introduction Pneumonia has been recognized as a disease entity since remote times, with definitions of the condition traceable in ancient Greek, Roman, and Arabic writings. Definitive recognition of the etiologic role of microorganisms in pneumonia, and the identification of Streptococcus pneumoniae as the most common causative agent was only achieved roughly 120 years ago.
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The actual incidence of pneumonia in ambulatory patients is difficult to estimate because the etiologic agent is rarely identified except in clinical trials, and CAP is not currently considered a reportable disease. Each year in the United States there are 2 to 3 million cases of CAP.
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The following Clinical Topic Tour provides an overview of pneumococcal pneumonia and was adapted by materials published by the National Institute of Allergy and Infectious Diseases and the CDC.
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Pneumococcal pneumonia is a common but serious infection and inflammation of the lungs. It is caused by the bacterium Streptococcus pneumoniae.The gram-positive, spherical bacteria, Streptococcus pneumoniae, is the cause of many human diseases, in...
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Pneumocystis pneumonia is a lung infection that occurs primarily in people with weakened immune systems—especially people who are HIV-positive. The disease agent is an organism whose biological classification is still uncertain.
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Pneumonia is a serious infection of the lung that impairs breathing. Small air sacs in the lung(alveoli) become filled with pus, mucus or other fluid, and cannot supply oxygen to circulating blood.
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Pneumonia is an infection of the lung that can be caused by nearly any class of organism known to cause human infections. These include bacteria, amoebae, viruses, fungi, and parasites.
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Eosinophilic pneumonia is a group of diseases in which there is an above normal number of eosinophils in the lungs and blood.Eosinophilia is an increase in the number of eosinophils. Eosinophilic pneumonia is characterized by a large number of eos...
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Chlamydial pneumonia refers to one of several types of pneumonia that can be caused by various types of the bacteria known as Chlamydia.Pneumonia is an infection of the lungs. The air sacs(alveoli) and/or the tissues of the lungs become swollen, a...
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Pneumonia is an infection of the lungs that can be caused by nearly any class of organism known to cause human infections, including bacteria, viruses, fungi, and parasites. It results in an inflammatory response within the small air spaces of the...
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One of the most common pulmonary complications affecting cancer patients, pneumonia is a potentially life-threatening inflammation of one or both lungs.Serious side effects in cancer patients most often occur in the lungs and may indicate that the...
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Cellulitis is a common skin infection caused by bacteria.
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Cellulitis is a spreading bacterial infection just below the skin surface. It is most commonly caused by Streptococcus pyogenes or Staphylococcus aureus.The word"cellulitis" actually means"inflammation of the cells."
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Pericarditis is a condition in which the sac-like covering around the heart(pericardium) becomes inflamed.Pericarditis is usually a complication of viral infections, most commonly echovirus or coxsackie virus. Less frequently, it is caused by infl...
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Pericarditis is an inflammation of the two layers of the thin, sac-like membrane that surrounds the heart. This membrane is called the pericardium, so the term pericarditis means inflammation of the pericardium.Pericarditis is fairly common.
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An acute upper airway obstruction is a blockage of the upper airway, which can be in the trachea, voice box(laryngeal), or throat(pharyngeal) areas.
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Endocarditis is inflammation of the inside lining of the heart chambers and heart valves(endocardium).
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The endocardium is the inner lining of the heart muscle, which also covers the heart valves. When the endocardium becomes damaged, bacteria from the blood stream can become lodged on the heart valves or heart lining.
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Endocarditis is an infection of the endocardium, the inner lining of the heart muscle and its four valves(tricuspid, pulmonary, mitral, and aortic). Abnormal or damaged endocardium is more likely to become infected when bacteria enter the bloodstr...
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A pleural effusion is an accumulation of fluid between the layers of tissue that line the lungs and chest cavity.Fluid in the chest; Fluid on the lung; Pleural fluid.Your body produces pleural fluid in small amounts to lubricate the surfaces of th...
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Pleural effusion occurs when too much fluid collects in the pleural space(the space between the two layers of the pleura). It is commonly known as"water on the lungs."
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Pleural effusion is the accumulation of fluid in the pleural space. The pleural space is the region between the outer surface of each lung(visceral pleurae) and the membrane that surrounds each lung(parietal pleurae).
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