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United States Department of Agriculture

Agricultural Research Service

Research Project: TESTING OF RECOMBINANT ANTIGENS FOR THE SERODIAGNOSIS OF JOHNE'S DISEASE
2009 Annual Report


1a.Objectives (from AD-416)
Development of an improved ELISA test for detection of paratuberculosis infection in body fluids in cattle and other ruminants.


1b.Approach (from AD-416)
Eleven (11) of the most promising recombinant M. paratuberculosis proteins (MAP0865, MAP0857c, MAP3817c, MAP3155c, MAP2077c, MAP3761c, MAP4014, MAP2166c, MAP3735c, MAP0900 and MAP1272c) will be evaluated by ELISA using a set of well-defined Johne’s disease-infected cattle sera as well as sera from control cattle. Additional recombinant proteins may be selected and screened based on preliminary data on antigenicity and specificity. Methodologies that will be used in this project include genomic and bioinformatics analysis techniques, immunological assays (Western blot and ELISA), and molecular cloning, as well as recombinant protein expression and purification, diagnostic test development and optimization. Proprietary PRIONICS ELISA technology will be used in this project, as well as a process for mass production of recombinant proteins developed by ARS.


3.Progress Report

This collaborative project between ARS National Animal Disease Center and Prionics Ag, Schlieren-Zurich, Switzerland is just beginning. Funding was received in July and research is now being started.


Last Modified: 12/18/2014
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