5Lehn N, Stower-Hoffmann J, Kott T, et al. Characterization of clinical isolates of Escherichia coli showing high levels of fluoroquinolone resistance[J]. Journal of Clinical Microbiology, 1996, 34(3): 597-602.
6Acar JF, Goldstein FW. Trends in bacterial resistance to fluoroquinolones[J]. Clinical Infectious Diseases, 1997, 24 (S1): 67-73.
7Sorum H, Sunde M. Resistance to antibiotics in the normal flora of animals[J]. Veterinarian Research, 2001, 32(3/ 4) : 227-241.
8Lim SK, Lee HS, Nam HM, et al. Antimicrobial resistance observed in Escherichia coli strains isolated from fecal samples of cattle and pigs in Korea during 2003-2004 [J]. International Journal of Food Microbiology, 2007, 116 (2) : 283-286.
9Yang Hanchun, Chen Sheng, David G, et al.Characterization of multiple-antimicrobial-resistant Eacherichia coli isolates from diseased chickens and swine in China[J]. Journal of clinical microbiology,2004,42(8): 3483-3489.
10Adesiyun A, Offiah N, Seepersadsingh N., et al. Antimicrobial resistance of Salmonella spp. and Escherichia coli isolated from table eggs [J]. Food Control, 2007,18(4): 306-311.