Isolation of Mycobacterium paratuberculosis from colostrum and milk of subclinically infected cows
1995
Streeter, R.N. | Hoffsis, G.F. | Bech-Nielsen, S. | Shulaw, W.P. | Rings, D.M.
Mycobacterial culture was performed on colostrum, milk, and feces from 126 clinically normal cows of a single herd with high prevalence of Mycobacterium paratuberculosis infection. Thirty-six (28.6 degrees h) cows were determined to be shedding the organism in the feces. Of the 36 fecal culture-positive cows, M paratuberculosis was isolated from the colostrum of 8 (22.2%) and from the milk of 3 (8.3%). Cows that were heavy fecal shedders were more likely to shed the organism in the colostrum than were light fecal shedders.
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