| johnin |
a filtrate of cultures of Mycobacterium paratuberculosis (Johne's bacillus), similar to tuberculin, used to produce a skin reaction (johnin reaction) in testing cattle for Johne's disease.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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| johnin r. |
a skin reaction like the tuberculin reaction, produced by filtrates of cultures of Mycobacterium paratuberculosis (see johnin); used in the diagnosis of Johne's disease in cattle.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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