1. 1. Asai, T., Harada, K., Ishihara, K., Kojima, A., Sameshima, T., Tamura, Y. and Takahashi, T. 2007. Association of antimicrobial resistance in Campylobacter isolated from food-producing animals with antimicrobial use on farms. Jpn. J. Infect. Dis. 60: 290–294.
2. 2. Asai, T., Kojima, A., Harada, K., Ishihara, K., Takahashi, T. and Tamura, Y. 2005. Correlation between the usage volume of veterinary therapeutic antimicrobials and resistance in Escherichia coli isolated from the feces of food-producing animals in Japan. Jpn. J. Infect. Dis. 58: 369–372.
3. 3. Bengtsson-Palme, J., Kristiansson, E. and Larsson, D. G. J. 2018. Environmental factors influencing the development and spread of antibiotic resistance. FEMS Microbiol. Rev. 42.
4. 4. Briñas, L., Zarazaga, M., Sáenz, Y., Ruiz-Larrea, F. and Torres, C. 2002. Beta-lactamases in ampicillin-resistant Escherichia coli isolates from foods, humans, and healthy animals. Antimicrob. Agents Chemother. 46: 3156–3163.
5. 5. Clinical Laboratory Standards Institute (CLSI). 2008. Performance standards for antimicrobial disk dilution susceptibility tests for bacteria isolated from animals; approved standard-3rd edition. M31-A3 vol. 28 No.8.