Mammary gland exposure of cows to Mycobacterium paratuberculosis.
Mycobacterium paratuberculosis injected into the mammary gland was transported to the supramammary lymph nodes in 5 of 6 cows and to the intestine of 1 cow. The bacillus caused hypersensitivity to johnin and stimulated the production of complement-fixing antibodies. Apparently, the bacillus is not a cause mastitis.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000209:etiology* / Q000382:microbiology / Q000473:pathology; D008198:Lymph Nodes / Q000382:microbiology / Q000473:pathology; D008321:Mammary Glands, Animal / Q000382:microbiology*; D009161:Mycobacterium / Q000302:isolation & purification; D010283:Paratuberculosis / Q000209:etiology* / Q000382:microbiology / Q000473:pathology