The Disease Benefits of CAFO's

An article of faith among foodies is that CAFO's are a cesspool of disease, incubators for death.  Maybe so, but this extension piece claims hogs in CAFO's have less lungworm, kidney worm, trichinella,  toxoplasma, swine dysentery, atrophic rhinitis, actinobacillus pleuropneumoniae, brucellosis, classical swine fever (hog cholera) and pseudorabies