johnin reaction

johnin reaction
a skin reaction like the tuberculin reaction, produced by filtrates of cultures of Mycobacterium avium subsp. paratuberculosis> (see johnin); used in the diagnosis of Johne disease in cattle.

Medical dictionary. 2011.

Look at other dictionaries:

  • johnin — A product used as a diagnostic agent, analogous to tuberculin but made from Mycobacterium paratuberculosis (the causative organism of Johne disease) grown in a broth medium containing Mycobacterium phlei (timothy hay bacillus); used as an… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.