I googled these word

pulmonary fibrosis Histoplasmosis and birds

lots of hits

be well 
Norm

http://www.fairview.org/healthlibrary/content/aha_pulmofib_crs.htm

Pulmonary fibrosis is also called interstitial lung disease. ... silica, and 
coal dust, and sensitivity to proteins made by animals such as birds and rats. 
...