milk quality

September 26, 2011
Managing Somatic Cell Counts – Looking Back and to the Future

P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
The bulk milk somatic cell count (SCC) is one of the most important indicators of milk quality and is used globally to define high quality milk. Looking back at our bulk milk SCC data shows the tremendous progress that we have made and allows us to recognize the important milk quality management practices that have helped to achieve this success.

evaluation tools

California Mastitis Test

Dairy Team, UW-Extension
The California Mastitis Test (CMT) is a simple, inexpensive way of detecting unseen infections. Unlike other tests that require laboratories to interpret the results, the CMT is a cowside test that gives valuable, rapid results.

Collecting Bulk Tank Milk Samples

Dairy Team, UW-Extension
Bulk tank cultures are often used in milk quality programs to monitor the types of mastitis
causing pathogens present in a herd.

Taking Sterile Milk Samples

Dairy Team, UW-Extension
Strict aseptic procedures must be used when collecting milk samples to avoid contamination with bacteria present on the skin of the cow, hands of the sampler and barn environment.

On Farm Culturing for Better Milk Quality

Dr. Pamela Ruegg, Dairy Science Department, University of Wisconsin-Madison
Provides an overview of how to set up an on farm milk culture system and use the results to make economically beneficial treatment decisions.

milk quality indicators

Associations Among Milk Quality Indicators in Raw Bulk Milk

Pantoja, J.F., Reinemann, D.J., and P.L. Ruegg, Dept. of Dairy Science, University of Wisconsin-Madison
Determines characteristics and associations among bulk milk quality indicators from a cohort of dairies that used modern milk harvest, storage and shipment systems and participated in an intensive program of milk quality monitoring.

Factors Associated with Coliform Count in Unpasteurized Bulk Milk

Pantoja, J.C.F., Reinemann, D.J., and P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Identifies factors associated with bulk milk coliform count.

Relationship Between Udder and Leg Hygiene Scores and Subclinical Mastitis

D.A. Schreiner and P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Determines the relationship between udder and leg hygiene scores of lactating dairy cattle and measures of subclinical mastitis.

Methods for Interpretation of Bulk Tank Cultures and Udder Hygiene Tests for Diagnosing High Bacteria Counts: A High LPC Count is Not Always a Cleaning Failure

D.J. Reinemann, Milking Research and Instruction Lab, University of Wisconsin-Madison
Presents methods that include using a wider variety of bacteria types and the application of some simple statistical methods such as trend and correlation analysis to improve your diagnostic skills.

Short Communication: Evaluation of an On-Farm Test to Estimate Somatic Cell Count

A.C.O. Rodrigues, et al. Department of Animal Science, University of Sao Paul and Department of Dairy Science, University of Wisconsin-Madison
Compares the results of an on-farm test, named Somaticell, with results of electronic cell counting and for milk somatic cell count among readers.

Troubleshooting High Bacteria Counts in Farm Milk

D.J. Reinemann et al., University of Wisconsin-Madison
Helps dairy producers and service personnel identify sources and resolve high bacteria count problems in raw milk.

Troubleshooting High Bacteria Counts in Bulk Milk: What Needs Cleaning, the Machine or the Cows?

D.J. Reinemann, University of Wisconsin-Madison
Provides the tools to diagnosis the source of bacteria in bulk tanks which will allow the investigator to focus intervention in the right place to solve the problem.

Assessment of the Impact of Somatic Cell Count on Functional Longevity in Holstein and Jersey Cattle Using Survival Analysis Methodology

D.Z. Caraviello, et al., Department of Dairy Science, University of Wisconsin-Madison
Uses individual cow somatic cell count data to estimate the impact of clinical and subclinical mastitis on the functional longevity of U.S. Holstein and Jersey cows using survival analysis methodology.

association of bedding types

Association of bedding types with management practices and indicators of milk quality on larger Wisconsin dairy farms

R.F. Rowbotham, P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Identifies associations of bedding type and selected management practices with bulk milk quality and productivity of larger Wisconsin dairy farms.

Associations of selected bedding types with incidence rates of subclinical and clinical mastitis in primiparous Holstein dairy cows

R.F. Rowbotham, P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Determines the association of exposure to selected bedding types with incidence of subclinical and clinical mastitis in Holstein dairy cows housed in identical pens at a single facility.

Budget Tool: Bedding choice for new freestall construction

R.F. Rowbotham, P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
The bedding choice partial net present value budget tool is designed to aid dairy farmers in making bedding decisions when constructing a new freestall barn. The primary output of the tool is a comparison of annual and per hundredweight margins calculated as gross milk income less partial bedding costs (MILPBC) for three types of bedding: Inorganic bedding (sand), organic bedding (wood products on top of mattresses), and manure (deep bedded) in freestalls.

scc across the dry period

Somatic Cell Count Status Across the Dry Period as a Risk Factor for the Development of Clinical Mastitis in the Subsequent Lactation

Pantoja, J.C.F., Hulland, C., and P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Determines the risk of mastitis in the first 120 days in lactation based on previous somatic cell count history in a herd with a very low prevalence of contagious pathogens.

Dynamics of Somatic Cell Counts and Intramammary Infections Across the Dry Period

Pantoja, J.C.F., Hulland, C. and P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Evaluates the relationship between somatic cell count and intramammary infection across the dry period and the risk of subclinical mastitis at the first dairy herd improvement test of the subsequent lactation.

To Dry Treat or Not to Dry Treat: Managing Dry Off to Produce High Quality Milk

P.L. Ruegg, Department of Dairy Science, University of Wisconsin-Madison
Provides practitioners with guidance about when selective dry cow therapy is advised and when it is not recommended.