Definition Parapneumonic pleural effusion is a buildup of fluid between layers of the tissue lining the lung and the chest cavity, which develops in the setting of pneumonia . Causes, incidence, and risk factors
Definition Atypical pneumonia refers to pneumonia caused by certain bacteria, including Legionella pneumophila , Mycoplasma pneumoniae , and Chlamydophila pneumoniae . Pneumonia is a condition in which there is an infection of the lung. Alternative Names Walking pneumonia; Chlamydophila pneumoniae; Community-acquired pneumonia - atypical Causes, incidence, and risk factors Mycoplasma pneumonia is a type of atypical pneumonia. It is caused by the bacteria M. pneumoniae . It typically affects people younger than age 40. For more information on this type of pneumonia, see: Mycoplasma pneumonia Pneumonia due to chlamydia-related bacteria occurs year round and accounts for 5 - 15% of all pneumonias. It is usually mild. Pneumonia due to Legionella is seen more often in middle-aged and older adults, smokers, and those with chronic illnesses or a weak immune system. See also: Legionnaire's disease
Alternative Names Pneumocystosis; PCP; Pneumocystis carinii Prevention Preventive therapy is recommended for: Patients with AIDS who have CD4 counts below 200 Bone marrow transplant recipients Organ transplant recipients People who take long-term, high-dose corticosteroids People who have had previous episodes of this infection References Feinberg JE. Pneumocystis pneumonia. In: Goldman L, Ausiello D, eds. Cecil Medicine . 23rd ed. Philadelphia, Pa: Saunders Elsevier; 2007:chap 362.
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