9Smith D G E,Lawson G H K.Lawsonia intracellularis:getting inside the pathogenesis of proliferative enteropathy[J]. Veterinary Microbiology,2001,82:331-345.
10Collins A M, Swift I, Monckton R P. Replication of Australian porcine isolates of ileal symbiont intracellularis in tissue culture[J]. Veterinary Microbiology,1996,49:249-255.
