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Acute extrinsic allergic alveolitis

Last reviewed dd mmm yyyy. Last edited dd mmm yyyy

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Acute extrinsic allergic alveolitis is a recurrent disease. Four to eight hours after exposure the patient complains of:

  • breathlessness
  • tightness in the chest
  • cough

More general symptoms such as malaise, fever, headache and myalgia may develop. The relationship between the exposure to dust and the development of symptoms is not always obvious because the initial reaction may be so slight.

On examination, there may be fine crepitations. If pulmonary fibrosis has developed, the patient may be clubbed.

Dyspnoea and cyanosis suggest severe disease.


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The content herein is provided for informational purposes and does not replace the need to apply professional clinical judgement when diagnosing or treating any medical condition. A licensed medical practitioner should be consulted for diagnosis and treatment of any and all medical conditions.

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