Isolation of Mycobacterium paratuberculosis from colostrum and milk of subclinically infected cows.
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%) 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.
Streeter
R N
RN
Department of Veterinary Clinical Sciences, Ohio State University, Columbus 43210, USA.
Hoffsis
G F
GF
Bech-Nielsen
S
S
Shulaw
W P
WP
Rings
D M
DM
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology*; D015169:Colony Count, Microbial / Q000662:veterinary; D003126:Colostrum / Q000382:microbiology*; D005243:Feces / Q000382:microbiology; D005260:Female; D008828:Microbiological Techniques / Q000662:veterinary; D008892:Milk / Q000382:microbiology*; D016927:Mycobacterium avium subsp. paratuberculosis / Q000302:isolation & purification*; D010283:Paratuberculosis / Q000382:microbiology*