Hay (organic dust)
There are 2 exposures and 2 cases of HP where Hay (organic dust) was identified as an antigen.
2002
Hypersensitivity pneumonitis in a five-year-old boy: an unusual antigen source
Aebischer, C. C., et al. Pediatric Pulmonology.
2005
[Farmer's lung disease caused by straw or hay? Case report]
Gudmundsson, G., et al. Laeknabladid.