TY - JOUR
T1 - Risk factors for bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Part 2
T2 - Bacteria count-specific risk factors
AU - Elmoslemany, A. M.
AU - Keefe, G. P.
AU - Dohoo, I. R.
AU - Jayarao, B. M.
N1 - Funding Information:
The authors acknowledge the technical support of Ron Sampson (Dairy Farmers of Prince Edward Island, Charlottetown, PE), Ricky Milton, Theresa Andrews, and Lloyd Dalziel (Atlantic Veterinary College, Charlottetown, PE). This research was funded by Dairy Farmers of Prince Edward Island, Agricultural Research Investment Fund (PEI Department of Agriculture, Charlottetown, PE), Purity Dairy (Charlottetown, PE), and Amalgamated Dairies Limited (Summerside, PE). Personal funding for A. M. Elmoslemany was provided by Mission Office, Ministry of Higher Education, Egypt.
PY - 2009/6
Y1 - 2009/6
N2 - A case-control study was conducted to identify specific on-farm risk factors that influence bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Total aerobic (TAC), preliminary incubation (PIC), laboratory pasteurization (LPC), and coliform (CC) counts were used to assess the bacteriological quality of bulk tank milk. Four case-control groups were defined based on the last 6 results of each test before on farm evaluation. A herd was classified as a TAC, PIC, or CC case when the herd had at least 4 high TAC, PIC, or CC counts out of the last 6 analyses for each test, respectively. For the LPC case group, a herd was required to have at least 3 high results out of the last 6 analyses. Control groups had low counts in the last 6 analyses for each test in the corresponding case group (TAC, PIC, CC, and LPC). The results of the study showed that TAC and PIC were mainly associated with cow and stall hygiene: washing the teats with water, not using teat predip, and dirty teats were risk factors. The LPC and CC were related to equipment hygiene, with high counts being associated with low temperature of the cleaning solution, high water-hardness score, and high alkalinity of alkaline detergent wash. Based on the findings of this study it can be concluded that TAC, PIC, LPC, and CC counts are of considerable value in identifying practices that could influence milk quality.
AB - A case-control study was conducted to identify specific on-farm risk factors that influence bacteriological quality of bulk tank milk in Prince Edward Island dairy herds. Total aerobic (TAC), preliminary incubation (PIC), laboratory pasteurization (LPC), and coliform (CC) counts were used to assess the bacteriological quality of bulk tank milk. Four case-control groups were defined based on the last 6 results of each test before on farm evaluation. A herd was classified as a TAC, PIC, or CC case when the herd had at least 4 high TAC, PIC, or CC counts out of the last 6 analyses for each test, respectively. For the LPC case group, a herd was required to have at least 3 high results out of the last 6 analyses. Control groups had low counts in the last 6 analyses for each test in the corresponding case group (TAC, PIC, CC, and LPC). The results of the study showed that TAC and PIC were mainly associated with cow and stall hygiene: washing the teats with water, not using teat predip, and dirty teats were risk factors. The LPC and CC were related to equipment hygiene, with high counts being associated with low temperature of the cleaning solution, high water-hardness score, and high alkalinity of alkaline detergent wash. Based on the findings of this study it can be concluded that TAC, PIC, LPC, and CC counts are of considerable value in identifying practices that could influence milk quality.
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U2 - 10.3168/jds.2008-1813
DO - 10.3168/jds.2008-1813
M3 - Article
C2 - 19447997
AN - SCOPUS:67649224531
SN - 0022-0302
VL - 92
SP - 2644
EP - 2652
JO - Journal of dairy science
JF - Journal of dairy science
IS - 6
ER -