Friday, October 24, 2008

COPD: an allergic phenomenon

- chronic obstructive pulmonary disease is a chronic bronchiolitis that involves airway constriction and expiratory effort. It involves:
  • hyperplasia and hypertrophy of bronchiolar epithelium
  • goblet cell metaplasia and increased airway secretions
  • excessive mucus retention in airways
- another allergic phenomenon is extrinsic allergic alveolitis; it is uncommon in animals.

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