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  • Title: Development of recombinant nucleocapsid protein based IgM-ELISA for the early detection of distemper infection in dogs.
    Author: Latha D, Geetha M, Ramadass P, Narayanan RB.
    Journal: Vet Immunol Immunopathol; 2007 Oct 15; 119(3-4):278-86. PubMed ID: 17659785.
    Abstract:
    An IgM-ELISA based on a 16-kDa recombinant protein produced for the conserved and functional middle region of nucleocapsid protein of Canine distemper virus was developed. Out of 70 serum samples from distemper-suspected and vaccinated dogs analyzed, 34 serum samples (49%) were positive. The specificity of this ELISA was confirmed by blocking and adsorption experiments. The IgM-ELISA based on the recombinant nucleocapsid protein showed a strong correlation (r=0.857, p<0.0001 at 95% CI) and good agreement (kappa=0.714) with the conventional Vero cell culture distemper antigen based IgM-ELISA. The percent positivity was more in dogs with systemic signs (62%) by recombinant nucleocapsid protein IgM-ELISA. Out of 70 clinical serum samples, 69 samples were used along with 4 control sera used in the IgM-ELISA for the detection of viral RNA by Slot blot hybridization and 26 of them (36%) were positive. Fifty-one percent agreement was observed between the recombinant nucleocapsid protein IgM-ELISA and Slot blot hybridization. The analysis of clinical history of the dogs with systemic signs supported the application of IgM-ELISA over Slot blot hybridization in the early detection of distemper infection.
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