joh·​nin ˈyō-nən How to pronounce johnin (audio)
: a sterile solution of the growth products of Johne's bacillus made in the same manner as tuberculin and used to identify Johne's disease by skin tests, conjunctival reactions, or intravenous injection

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Cite this Entry

“Johnin.” Medical Dictionary, Merriam-Webster, Accessed 22 Sep. 2023.

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