SPF = Specific Pathogen-Free. Just what, however, do those terms mean? This article is a report on the Spcific Pathogen-Free approach to swine production - what it means, how it works and what it can and cannot do.
Spear, Maynard L. D.V.M.
"SPF Swine - A Tool for Healther Hogs,"
Iowa Farm Science: Vol. 17
, Article 7.
Available at: https://lib.dr.iastate.edu/farmscience/vol17/iss3/7