Confused and have questions? We’ve got answers. With Chegg Study, you can get step-by-step solutions to your questions from an expert in the field. If you rather get 1:1 study help, try 30 minutes of free online tutoring with Chegg Tutors.

Johnin

From Biology-Online Dictionary | Biology-Online Dictionary
Jump to: navigation, search

Johnin

a product used as a diagnostic agent, analogous to tuberculin but made from mycobacterium paratuberculosis (the causative organism of Johne's disease) grown in a broth medium containing mycobacterium phlei (timothy hay bacillus); used as an allergen to provoke reactions in infected animals.

Origin: H. A. Johne