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Self Study - Unit 3.2 Respiratory System Pathology Pg...

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Unit 3.2 Respiratory System Pathology Pg. 323-375 Infectious Pneumonia : inflammatory condition of the lungs TABLE 19-4 - Lobar pneumonia: (pneumococcal pneumonia) caused by Streptococcus Pneumoniae (Pneumococcus) . infection is localized in one or more lobes First stage: congestion inflammation and vascular congestion develops in alveolar wall, exudates forms in alveoli Second stage: consolidation neutrophils, RBCs, and fibrin accumulates in alveolar exudate, forming a solid mass (consolidation) Pleurisy/pleuritis: pleuritic pain Empyema: collection of pus between lungs and pleural space - Bronchopneumonia: occurs as a diffuse pattern of infection in both lungs, more often in the lower lobes. Begins in bronchial mucosa and spreads to local alveoli. Interferes with oxygen diffusion Moderate fever, coughs, and rales - Legionnaires’ disease: caused by gram-negative bacteria ( Leginella pneumophila) If untreated, infection causes severe congestion and consolidation, with necrosis in the lung and possible fatal consequences - Primary atypical pneumonia Involves interstitial inflammation Mycoplasma pneumoniae , small bacterium lacking cell wall. Normally found in upper respiratory tract. Common in older children and young adults Viral pneumonia: caused by influenza A or B, adenoviruses and respiratory syncytial virus (RSV). Begins with inflammation in mucosa of upper respiratory tract then descends to involve lungs. Inflammation + little exudates Chlamydia pneumonia: caused by Chlamydia pneumoniae - Pneumocystis carinii pneumonia: type of atypical pneumonia Causes pneumonia in infants Fatal infection to those with AIDS Fungus inhaled and attaches to alveolar cells necrosis + inflammation Alveoli fills with exudates and fungi Obstructive Lung Disease Lung Cancer - Most common malignant lung tumour: Bronchogenic carcinoma -
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  • Winter '11
  • M.TUTTLE
  • Pleural cavity, obstructive pulmonary disease, pleural cavity FIGURE, pleural space Bronchopneumonia, enters pleural cavity

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