5LEVYS B. The challenge of antibiotic resistance [ J ]. Sei Am, 1998, 278 (3) : 46 - 53.
6RAYAMAJHI N,KANG S G,KANG M L,et al. Assessment of anti- biotic resistance phenotype and integrons in Salmonella enterica ser- ovar Typhimurium isolated from swine [ J ]. J Vet Med Sci, 2008,70 (10) :1133 -1137.
7MARSHALL B M, LEVY S B. Food animals and antimicrobials: impacts on human health [ J ]. Clin Microbial Rev, 2011,24 ( 4 ) : 718 -733.
8CASEWELL M, FRIIS C, MARCO E, et al. The European ban on growth - promoting antibiotics and emerging consequences for human and animal health [ J ]. J Antimicrob Chemother, 2003,52 ( 2 ) : 159 - 161.