Progress 10/01/08 to 10/01/10
OUTPUTS: We completed surveys on 100 dairy farms in New York. All farms were visited, a questionnaire was completed and bulk milk samples were taken and analyzed for sporeforming organisms. We observed a large variability in the number of sporeforming bacteria between farms. With the survey on management factors that we performed at the time of sampling, we were able to connect management practices to sporeformer quantity. The main factors associated with sporeformers were cow hygiene, milk filter hygiene, bulk milk somatic cell count and stall hygiene. Results were reported back to the dairy farms. In the second year, we selected the 10 farms with the highest count of sporeforming organisms and the 10 farms with the lowest count of sporeforming organisms. These 20 farms were followed on a monthly basis for a full year. Every month milk samples and management practices were recorded. The seasonality of the count of sporeforming organisms was studies PARTICIPANTS: At Cornell University the following participated: Dr Ynte Schukken Dr Gary Bennett Dr Kathryn Boor Dr Martin Wiedmann Ms Stephanie Massielo Mr Brad Rauch. Several field technicians at Quality Milk Production Services contributed to this project by collecting data on the farms. TARGET AUDIENCES: Dairy Farmers Dairy Veterinarians Dairy processors PROJECT MODIFICATIONS: No major modifications have taken place. The project went according to plan and was very successful. We have obtained additional funding to continue the project with a second set of dairy farms and work on intervention programs to reduce sporeformers in bulk tank milk.
A very important difference was observed between farms. Some farms have very high quality milk with very few sporeforming bacteria. Other farms have much higher counts. The sporeformer count is related to but certainly not strongly correlated with other milk quality parameters such as somatic cell count and bacteria counts. This points towards additional factors directly associated with sporeformer count. The dairy processing industry has shown a great interest in these results as sporeformers have a major impact on shelf life of dairy products. Presentations on the results have been presented to dairy farmers, dairy veterinarians and the dairy processing industry. In total approximately 700 individuals have been reached. The most important finding in the second and final year of the study was that farms that have high counts of sporeformers tend to have high counts throughout the year. similarly, farms with low counts tend to have these low counts consistently throughout the year. The implication of this is that we will be able to identify farms with these milk characteristics on a consistent bases. It will also allow us to work with these farms to improve milk quality.
- Identification and Characterization of Psychrotolerant Sporeformers Associated with Fluid Milk Production and Processing. Ivy RA, Ranieri ML, Martin NH, den Bakker HC, Xavier BM, Wiedmann M, Boor KJ. Appl Environ Microbiol. 2012 Jan 13. [Epub ahead of print]
- Results from raw milk microbiological tests do not predict the shelf-life performance of commercially pasteurized fluid milk. Martin NH, Ranieri ML, Murphy SC, Ralyea RD, Wiedmann M, Boor KJ. J Dairy Sci. 2011 Mar;94(3):1211-22.
Progress 10/01/08 to 09/30/09
OUTPUTS: The first year of the project was focused on data collection in the field. In the first year we have enrolled 88 out of the 100 herds. PARTICIPANTS: Partners on the project were: Quality Milk Productions Services at Cornell University. Department of Animal Science and Food Science at Cornell University. so far 88 dairy farmers have been enrolled in the project. TARGET AUDIENCES: The target audience for this project are dairy farmers. The first year of the project was focused on data collection. Two presentations on the project were presented to dairy farmers. PROJECT MODIFICATIONS: Nothing significant to report during this reporting period.
Two presentation were given to NY dairy producers about the project. A total of 55 dairy farmers were present at the meetings.
- No publications reported this period