2Koh S H,George S,Brozel V,et al. Poricine intestinal epithelialcell lines as a new in vitro model for studying adherence andpathogensis of enterotoxigenic E.Vet Microbiol,2008,13(1-2):191-197.
3Dondersgoed J V, Dussault M,Knight P, et al. Clinical efficacyof a single injectioin of ceftiofur crystalline free acicl sterile in-jectable suspension versus three daily injections of ceftiofursodium sterile powder for the treatment of footrot in feedlotcattle[J]. Vet Ther,2008,9(2) :157-162.
