›› 2018, Vol. 45 ›› Issue (2): 493-500.doi: 10.16431/j.cnki.1671-7236.2018.02.026

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A Comparative Study of Various Methods for the Detection of Dynamic Rule of the Antibody Against Salmonella Pullorum

LIU Yang1, LI Dan2, WANG Chuanbin1, HUO Siqi1, LIU Yuliang1, GU Xiaoxue1   

  1. 1. China Animal Disease Control Centre, Beijing 100125, China;
    2. Yangzhou University, Yangzhou 225009, China
  • Received:2017-08-16 Online:2018-02-20 Published:2018-02-10

Abstract:

To compare and evaluate the different methods for detection Salmonella Pullorum (S. Pullorum) antibody, and to provide scientific guidance for the purification of breeding chicken farms, SPF chickens were inoculated with active and inactivated S. Pullorum. Serum samples were collected and detected by three different methods (rapid serum agglutination, micro-agglutination and ELISA), and Kappa test was applied to determine the concordance among different methods. The results showed that positive samples were detected earlier when using rapid serum agglutination than ELISA, but the later method had a longer detection period above the threshold on positive samples, which was more consistent with the dynamic rule of antibody in S. Pullorum positive chickens. It showed weak agreement among three different methods (Kappa value were 0.002 to 0.295). In conclusion, the study demonstrated that there were big differences among three methods for S. Pullorum antibody detection. ELISA might be the best choice in single S. Pullorum infection, because of its no false positive interference, longer detection period above the threshold on S. Pullorum positive samples and more consistent with the dynamic rule of antibody.

Key words: Salmonella Pullorum; artificial infection; antibody; rapid serum agglutination test; micro-agglutination test; ELISA; Kappa test

CLC Number: