T-Stor
 

T-Stor >
Irish Journal of Agricultural & Food Research >
IJAFR, volume 52, no 2, 2013 >

Please use this identifier to cite or link to this item: http://hdl.handle.net/11019/531

Title: Farm management factors associated with the Bacillus cereus count in bulk tank milk
Authors: O'Connell, Aine
Ruegg, P.L.
Gleeson, David E
Keywords: Bacillus cereus
Farm factors
Milk quality
Thermoduric bacteria
Issue Date: 2013
Publisher: Teagasc (Agriculture and Food Development Authority), Ireland
Citation: A. O’Connell, P.L. Ruegg and D. Gleeson. 2013. Farm management factors associated with the Bacillus cereus count in bulk tank milk. Irish Journal of Agricultural and Food Research 52: 229–241
Series/Report no.: Irish Journal of Agricultural and Food Research;vol 52
Abstract: The objective of this study was to determine the on-farm management factors that are associated with the Bacillus cereus count in raw bulk tank milk using a cross sectional study design. Bulk tank milk quality was monitored for B. cereus on 63 dairy farms between July and August 2012. Bulk tank milk samples corresponding with processor milk collection dates were taken over a two week period prior to the farm visit and tested for B. cereus. The four most recent samples taken prior to the on-farm visit were averaged and log transformed to give the outcome variable; mean log10 B. cereus cfu/mL. On-farm data collection included recording observations and providing a questionnaire on basic hygiene, management factors and cow hygiene scoring. All independent variables were analysed individually with the outcome variable using simple linear regression and one-way ANOVA; a multivariable regression model was subsequently developed. Only significant variables were retained in the final model (P < 0.05). The geometric mean B. cereus count for all milk samples was 40 cfu/mL. The start temperature of the cleaning solution wash, dry wiping teats prior to unit application, the feeding of silage and reusing the cleaning solution more than once were all unconditionally associated (P < 0.10) with the B. cereus count in bulk tank milk but did not enter the final multivariable model. B. cereus count was four times greater (201 cfu/mL) when cows had been housed compared to when they were on pasture (50 cfu/mL). The allocation of fresh grass every 12 h (62 cfu/mL) resulted in a decrease in B. cereus count (166cfu/mL every 24 h or greater). The testing of water for bacteriology was associated with an increase in B. cereus count. In conclusion, this study highlights specific management factors associated with the B. cereus count in bulk tank milk.
Description: peer-reviewed
URI: http://hdl.handle.net/11019/531
ISSN: 0791-6833
Appears in Collections:Livestock Systems
Livestock Systems
IJAFR, volume 52, no 2, 2013

Files in This Item:

File Description SizeFormat
ijafr_229-241.pdf120.39 kBAdobe PDFView/Open

This item is protected by original copyright


View Statistics

Items in T-Stor are protected by copyright, with all rights reserved, unless otherwise indicated.

 

Valid XHTML 1.0! Teagasc - The Agriculture and Food Development Authority  2012  - Feedback