Short Communication: Quantification of the Transmission of Microorganisms to Milk via Dirt Attached to the Exterior of Teats
Open Access
- 1 August 2007
- journal article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 90 (8), 3579-3582
- https://doi.org/10.3168/jds.2006-633
Abstract
Pathogens and spoilage microorganisms can be transmitted to milk via dirt (e.g., feces, bedding material, soil, or a combination of these) attached to the exterior of the cows' teats. To determine the relevance of this pathway and to perform quantitative microbial risk analysis of the microbial contamination of farm tank milk (FTM), it is important to know the amount of dirt transmitted to milk via the exterior of teats. In this study at 11 randomly selected Dutch farms the amount of dirt transmitted to milk via the exterior of teats is determined using spores of mesophilic aerobic bacteria as a marker for transmitted dirt. The amount of transmitted dirt to milk varied among farms from approximately 3 to 300 mg/L, with an average of 59 mg/L. The usefulness of the data for microbial risk analyses is briefly illustrated using the contamination of FTM with spores of butyric acid bacteria as a case study. In a similar way the data can be used to identify measures to control the contamination of FTM with other microorganisms or chemical residues.Keywords
This publication has 8 references indexed in Scilit:
- Minimizing the Level of Butyric Acid Bacteria Spores in Farm Tank MilkJournal of Dairy Science, 2007
- Concentrations of Butyric Acid Bacteria Spores in Silage and Relationships with Aerobic DeteriorationJournal of Dairy Science, 2007
- Improving Farm Management by Modeling the Contamination of Farm Tank Milk with Butyric Acid BacteriaJournal of Dairy Science, 2006
- Good hygienic practice in milk processingPublished by Taylor & Francis Ltd ,2003
- Simulation Modeling for Microbial Risk AssessmentJournal of Food Protection, 1998
- Effect of pasturing on the incidence of Bacillus cereus spores in raw milkInternational Dairy Journal, 1997
- A risk assessment study ofBacillus cereuspresent in pasteurized milkFood Microbiology, 1997
- Risk Factors Associated with Contamination of Raw Milk by Listeria monocytogenes in Dairy FarmsJournal of Dairy Science, 1993