TY - JOUR
T1 - Long term effects of Escherichia coli mastitis
AU - Blum, Shlomo E.
AU - Heller, Elimelech D.
AU - Leitner, Gabriel
PY - 2014/7
Y1 - 2014/7
N2 - 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, 131.7days±78.6 and 45.7L±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 <30days until return to normal ( n=5), and 'long inflammation', characterized by >15% decrease in DMY and >30days to reach a new maximum DMY ( n=19). The estimated mean loss of marketable milk during the study was 200L/cow for 'short inflammation' cases, and 1500L/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.
AB - 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, 131.7days±78.6 and 45.7L±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 <30days until return to normal ( n=5), and 'long inflammation', characterized by >15% decrease in DMY and >30days to reach a new maximum DMY ( n=19). The estimated mean loss of marketable milk during the study was 200L/cow for 'short inflammation' cases, and 1500L/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.
KW - Dairy
KW - Escherichia coli
KW - Leukocyte
KW - Mastitis
KW - Milk quality
UR - http://www.scopus.com/inward/record.url?scp=84902547619&partnerID=8YFLogxK
U2 - 10.1016/j.tvjl.2014.04.008
DO - 10.1016/j.tvjl.2014.04.008
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C2 - 24906501
AN - SCOPUS:84902547619
SN - 1090-0233
VL - 201
SP - 72
EP - 77
JO - Veterinary Journal
JF - Veterinary Journal
IS - 1
ER -