I often wonder about things like this as I scoop potting soil. No doubt we should all be wearing masks.
An interesting abstract. Hypersensitivity pneumonitis can have many causes and is not necessarily linked to greenhouses. You will note that smoking may be somewhat protective (I do not advocate smoking). What follows is a brief in UpToDate. I am not sure that the entire article below will upload.
Epidemiology and causes of hypersensitivity pneumonitis (extrinsic allergic alveolitis)
Talmadge E King, Jr, MD
Kevin R Flaherty, MD, MS
Helen Hollingsworth, MD
Last literature review version 17.2: May 2009 | This topic last updated: July 7, 2008 (More)
I’m starting to feel rather “Howard Hughes” all of a sudden. reaches for a filter mask and a box of tissues