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Long term effects of Escherichia coli mastitis. | LitMetric

Long term effects of Escherichia coli mastitis.

Vet J

National Mastitis Reference Center, Kimron Veterinary Institute, Ministry of Agriculture and Rural Development, P.O. Box 12, Bet Dagan 50250, Israel. Electronic address:

Published: July 2014

AI Article Synopsis

  • - Escherichia coli is a leading cause of bovine mastitis, often leading to acute clinical cases, and this study aimed to assess its long-term impact on milk yield and quality in dairy cows.
  • - The research involved 24 Israeli Holstein cows, measuring factors like daily milk yield (DMY), somatic cell count (SCC), and milk coagulation before and after infection, identifying two inflammation patterns: 'short inflammation' and 'long inflammation'.
  • - Findings showed that 'short inflammation' resulted in a mean milk loss of 200 L/cow, while 'long inflammation' led to a loss of 1,500 L/cow, with significant negative effects on milk quality persisting even after

Article Abstract

Escherichia coli is one of the most frequently diagnosed causes of bovine mastitis, and is typically associated with acute, clinical mastitis. The objective of the present study was to evaluate the long term effects of intramammary infections by E. coli on milk yield and quality, especially milk coagulation. Twenty-four Israeli Holstein cows diagnosed with clinical mastitis due to intramammary infection by E. coli were used in this study. Mean lactation number, days in milk (DIM) and daily milk yield (DMY) at the time of infection was 3.3 ± 1.3, 131.7 days ± 78.6 and 45.7 L ± 8.4, respectively. DMY, milk constituents, somatic cells count (SCC), differential leukocytes count and coagulation parameters were subsequently assessed. Two patterns of inflammation were identified: 'short inflammation', characterized by <15% decrease in DMY and <30 days until return to normal (n = 5), and 'long inflammation', characterized by >15% decrease in DMY and >30 days to reach a new maximum DMY (n = 19). The estimated mean loss of marketable milk during the study was 200 L/cow for 'short inflammation' cases, and 1,500 L/cow for 'long inflammation' ones. Significant differences between 'short' and 'long inflammation' effects were found in almost all parameters studied. Long-term detrimental effects on milk quality were found regardless of clinical or bacteriological cure of affected glands.

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Source
http://dx.doi.org/10.1016/j.tvjl.2014.04.008DOI Listing

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