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  • Title: An observational study of Corynebacterium bovis in selected Ontario dairy herds.
    Author: Brooks BW, Barnum DA, Meek AH.
    Journal: Can J Comp Med; 1983 Jan; 47(1):73-8. PubMed ID: 6831308.
    Abstract:
    An observational study of Corynebacterium bovis was conducted in 74 Ontario dairy herds. The levels of infection with C. bovis were 19.9, 36.2 and 85.6% at the quarter, cow and herd level, respectively. Teat disinfection was found to be the variable best able to distinguish between herds with a high or low C. bovis quarter infection rate. Mean total milk somatic cell counts for 1103 quarters and 107 cows infected with only C. bovis ranged between 150,000 and 200,000/mL and were significantly higher than for uninfected quarters or cows. The rate of infection with mastitis pathogens was not significantly different in quarters previously colonized with only C. bovis compared to previously uninfected quarters.
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