How is hypersensitivity pneumonitis (HP) prevented?

Updated: Oct 08, 2020
  • Author: Caleb Hsieh, MD, MS; Chief Editor: John J Oppenheimer, MD  more...
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Reduce the chances of contracting hypersensitivity pneumonitis (HP) by minimizing exposure to provocative antigens, reducing microorganism contamination in the environment, and/or using protective equipment.

Reduce the antigenic burden by altering the handling and storage of microbial antigens, wetting compost to decrease aerosolization, and using fungicides to decrease fungal growth.

Dehumidify the environment and remove stagnant water to discourage microbial overgrowth.

Perform preventive maintenance routinely on all heating, ventilation, and air-conditioning equipment. Remove water-damaged furnishings and carpeting.

When avoidance of causative antigens cannot be achieved easily, use protective devices such as personal respirators or air-purifier. Dust respirators do not provide adequate protection, and helmet-type air purifying respirators are efficacious but can be cumbersome to wear.

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