›› 2013, Vol. 40 ›› Issue (12): 204-207.

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Identification and Antibiotic Analysis of Salmonella Isolated from Feed and its Original Materials

SHE Rong1,2, LIU Yao-min1, DU Xue-li1, YAN Qi-gui2,3   

  1. 1. Inspection Center, Tongwei Co., Ltd., Chengdu 610041, China;
    2. College of Veterinary Medicine, Sichuan Agricultural University, Ya'an 625014, China;
    3. Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Ya'an 625014, China
  • Received:2013-05-15 Online:2013-12-20 Published:2014-02-11

Abstract: To establish the theoretical basis for the prevention and control of Salmonella spreading, the experiment was to analyze the contamination and drug resistance of Salmonella in feed and its original materials. 707 samples were detected and Salmonella were isolated and identified in accordance with the methods GB/T 13091-2002, the serotype was classified in accordance with GB 4789.4-2010, and Kirby-Bauer disc diffusion method was used to detect the resistance of strains. The results showed that fifty-six (7.9%) strains were demonstated as positive, 52 of which were from the materials of animal origin. Four serotypes were found, including Agona, AgonaⅡ, Bournemouth, Mokola. By drug susceptibility test, the antibiotic rate of Salmonella in feed was much lower than those originated from human and animals, the rest of strains due to the categeries limitaion of serum, the serotype only classified into the group, failed to further classification. Drug sensitive test showed that there were still one strain of 13 multidrug-resistant, two strains of 4 multidrug-resistant, twelve strains of 2 multidrug-resistant and nine strains of 3 multidrug-resistant with different resistance spectrum. Although the test demonstrated relatively low percentage and level of Salmonella in the feed, there still had a few individual strains with serious drug resistance, so it was necessary to watch the application of antibiotics in animal husbandry strictly.

Key words: Salmonella; serotype; drug-resistance

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