AGID Blood Test for JD

A simple one-day test to confirm a diagnosis of Johne's disease in cattle is the AGID test. Serum from the animal is place in one well, a positive control is place in another, and soluble antigen is place in the third (top well). Formation of a white line of precipitation between the sample well and the antigen well is considered a positive test. This test is commercially available (Rapid Johne's Test, ImmuCell Corp.) and can be done without need of special equipment.

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Last revised February 19, 1997.
URL is http://www.vetmed.wisc.edu/pbs/johnes/agid.html.
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All material Copyright © 1996 by the Board of Regents of the University of Wisconsin System. School of Veterinary Medicine, all rights reserved. If you have questions or comments about this page email us at: mcollin5@facstaff.wisc.edu