NATIONAL MASTITIS COUNCIL
1997 ANNUAL MEETING PROCEEDINGS
TABLE OF CONTENTS

President's Report
K. Larry Smith, NMC President, Ohio State University, Wooster, OH

PAPERS PRESENTED AT THE SEMINAR JOINTLY SPONSORED WITH THE INTERNATIONAL DAIRY FEDERATION A2 GROUP OF MASTITIS EXPERTS

Quality Milk Production - Potential Hazards, Critcal Control Points, and the Application of Risk Analysis
Walther Heeschen, Federal Dairy Research Center, Kiel Germany

FDA Concerns With Pathogens and Chemical Contaminants in Raw Milk
Joseph Smucker, U.S. Food and Drug Administration, Washington, D.C.

Mastitis and Dairy Environmental Pathogens of Public Health Concern
James Cullor, University of California, Tulare, CA

Milk as a Risk Factor for BSE
Eric Hillerton, Institute for Animal Health, Compton, United Kingdom

Raw Milk Cheese and Human Health Concerns
Alfonso Zecconi, University of Milan, Milan, Italy

PAPERS PRESENTED AT THE GENERAL SESSION

Perspectives on Mastitis from Down Under
Murray Woolford, Dairying Research Corp., Ruakura Research Station, Hamilton, New Zealand

Troubleshooting High Bacteria Counts in Farm Milk
Doug Reinemann, University of Wisconsin, Madison, WI

Use of Strategic Sampling at Strategic Times to Solve High Bacteria Count Problems in Bulk Tank Milk
Jenks Britt, University of Wisconsin, Madison, WI

The Relationship Between Mouthpiece Vacuum, Teat Condition and Udder Health
Morten Dam Rasmussen, Danish Institute of Animal Science, Tjele, Denmark

Vacuum Level Measurement Using Flow Stimulation
Steven Stewart, University of Minnesota, St. Paul, MN

The Effects on Parlor Performance by Variation of Detacher Settings
David Reid, Rocky Ridge Veterinary Service SC, Hazel Green, WI

Principles and Methods for Managing Udder Health Data
Ken Leslie, University of Guelph, Guelph, Ontario, Canada

Scattergraphs as a New Tool for Managing Udder Health Data
Paul Rapnicki, Kiel Veterinary Clinic, Kiel, WI

Usefulness of Recording Clinical Mastitis Episodes
Theo Lam, Utrecht University, Utrecht, The Netherlands

Cost-Effective Management of Udder Health Data in Large Dairies
David Wolfgang, Pennsylvania State University, University Park, PA

Managing Automated Electrical Conductivity Data
David Kelbert, Production Medicine Services, St. Augustine, FL

Biosecurity Principles as Applied to Udder Health Management
William Sischo, Pennsylvania State University, University Park, PA

Evaluation of Milk Culture, SCC and CMT for Screening Herd Additions
David Wilson,Cornell University, Ithaca, NY

Approaches to Achieving and Maintaining a Herd Free of Mycoplasma Mastitis
David Bray, University of Florida, Gainesville, FL

Udder Health Management in a Large Dairy Herd--Maintaining Control
Andy Keeter, DVM and County Line Dairy, Lake Arthur, NM

Reducing Intramammary Infection in Heifers Utilizing Tail Tags
Sam Galphin, S. Galphin Services, Raleigh, NC

Frequent Milk-Out as a Treatment for Subacute Clinical Mastitis
Jerry Roberson, Virginia Polytechnic Institute, Balcksburg, VA

JVAC: Effect of Route of Immunization Against Coliform Bacterial Challenge
Grant Tomita, Louisiana State University, Hill Farm Research Station, Homer, LA

Dry Cow Antibiotic Screening Tests: Evaluation, Characteristics, and Use
Norris Alderson, U.S. Food and Drug Administration, Laurel, MD

Results of the National Tanker Monitoring Program
Joseph Smucker, U.S. Food and Drug Administration, Washington, DC

Findings in Field Investigations of Residue Violations
Norman Corlett, Milk Marketing Inc., Strongsville, OH

Antibiotic Residue Tests for Individual Cows-An Update
Sheila Andrew, University of Connecticut, Storrs, CT

POSTERS PRESENTED AT THE TECHNOLOGY TRANSFER SESSION

Evaluation of two post-milking management strategies during the winter months.
R.J. Norell, J.H. Packham, S.C. Parkinson, S. Gortsema, and S. Harrison, University of Idaho, Idaho Falls, ID, and L.K. Fox, Washington State University, Pullman, WI

Characterization of teat end lesions observed on dairy cows during winter.
L.L. Timms and M. Ackermann, Iowa State University, Ames, IA and M. Kherli National Animal Disease Center, Ames IA

Evaluation of a novel persistent barrier teat dip for preventing mastitis during the dry period.
L.L. Timms, A. Steffens, S. Piggott and L. Allen, Iowa State University, Ames, IA

Concentrated teat dips for today's producer.
T.C. Hemling and M.D. McKinzie, West Agro, Inc., Kansas City,MO

Agrisept Tabs: Microbial control for mastitis prevention.
J.S. Cullor, University of California, Tulare, CA, and J. Cash-Ott, Mallinckrodt Veterinary, Inc., Mundelein, IL

Field applied somatic cell determination (SomaLite) in comparison to Foss. (ESCC)
T. Angstadt, Dairylea Cooperative, Syracuse NY and R.S. Salter, Charm Sciences Inc., Malden, MA.

The differential inflammatory cell count (DICC) as determined via the Bryte HL Flow Cytometer from Bio-Rad.
D. Redelman, Sierra Cytometry, Reno, NV

A mastitis monitoring program using the differential cell count (DICC).
D. Redelman, Sierra Cytometry, Reno, NV

Relating subclinical mastitis to DHIA data and management practices in 30 herds using an artificial neural network.
C.W. Heald, T. Kim, W.M. Sischo and J.B. Cooper, Pennsylvania State University University Park, PA

Using PCDART as a part of TQM.
W.D. Gilson and J.W. Smith, University of Georgia, Athens, GA

Analyzing herd somatic cell counts using DHI herd summary data.
J.W. Smith and W.D. Gilson, University of Georgia, Athens, GA

Assessing mastitis control strategies with SIMMAST.
H.G. Allore, H.N. Erb and P.A. Oltenacu, Cornell University, Ithaca, NY

Managing milk quality, a training course for dairy farmers.
P. Levesque, Institute of Agricultural Technology, La Pocatiere, Quebec, Canada

Dairy production in the Tokachi region of Japan.
K. Weo, Tokachi Federation of Agricultural Cooperatives, Hokkaido, Japan

A study of mastitis-causing pathogens in the swine herd as compared to those in the commercial dairy herd.
K.A. Jappers, A.G. Mathew, S.E. Chattin, University of Tennessee, Knoxville, TN

Effects of testing labs, counting methods and sample shipment on SCC of goat milk.
S.S. Zeng, E.N. Escobar, and S. Hart, Langston University, Langston, OK, L. Hinckley, University of Connecticut, Storrs, CT M. Baulthaus, DQCI Services, St. Paul, MN, G.T. Robinson, Texas Federal Milk Marketing Order, Carrolton, TX, G. Jahnke, Dairy Laboratory Services Dubuque, IA

Somatic cell count in the first six milkings after calving.
H.W. Barkema and A.L.W. DeGee, Animal Helath Service, Drachten, The Netherlands, H.A. Deluyker and M.F.G. Van Goubergen, Pharmacia & Upjohn N.V., Puurs, Belgium, Y.H. Schukken and T.J. G.M. Lam, Utrecht University, Utrecht, The Netherlands

Influence of milk somatic cell count on cheese yield.
P. Tavolaro, L.F. Laranja da Fonseca, J.C. Paneta, C.L.Q. Sousa, O.L. Varga, L.C. Ferreira and P.H.M. Rodrigues, University of Sao Paulo, Sao Paulo, Brazil

Efficacy of extended lactational intramammary antibiotic treatment against Staphyloccus aureus mastitis.
M.B. Cattel, Dairy Research and Technology, Loveland, CO and A. Belschner, Pharmacia and Upjohn Animal Health, Kalamazoo, MI

Dihydrostreptomycin residue concentration and penicillin activity in milk from dairy cows treated IMM with Quartermaster 44-60 days prepartum.
J.W. Hallberg, R.E.Hornish, T.S. Arnold and C.P. Benner, Pharmacia and Upjohn Animal Health, Kalamazoo, MI

Minimum inhibitory concentrations for eight antimicrobial agents against mastitis organisms from dairy heifers from Denmark.
S.A. Salmon and J.L. Watts, Pharmacia and Upjohn Animal Health, Kalamazoo MI and F.M. Aarestrup, Danish Veterinary Laboratory, Copenhagen, Denmark

Influence of prepartum antibiotic administration on intramammary infections in multiparous dairy cows during early lactation.
S.P. Oliver, M.J. Lewis, and H.H. Dowlen, University of Tennesse, Knoxville, TN

Mastitis pathogen isolation in heifers throughout lactation following prepartum antibiotic treatment.
S.P. Oliver, M.J. Lewis, B.E. Gillespie, and H.H. Dowlen, University of Tennesse Knoxville, TN

Subtyping of Streptococcus dsygalactiae isolated from bovine mammary glands by DNA fingerprinting.
S.P. Oliver and B.E. Gillespie, University of Tennessee, Knoxville,TN, B.M. Jayarao, South Dakota State University, Brookings, SD, and J.W. Pankey, University of Vermont, Burlington, VT

DNA fingerprinting of Staphyloccus aureus isolated from horn flies and from intramammary secretions of heifers.
S.P. Oliver and B.E. Gillespie, University of Tennessee, Knoxville, TN, W.E. Owens and S.C. Nickerson, Lousiana State University, Homer, LA

Strain typing Staphyloccus aureus from bovine intramammary infections using antibiograms, biochemical profiles, and DNA fingerprinting.
R. Wallace, University of Illinois, Urbana, IL, K. Hoble, J. Hogan, and G.Queen, Ohio State University, Columbus, OH and L.K. Fox, Washington State University, Pullman, WA

Diagnosis of Mycoplasma mastitis using Polymerase Chain Reaction: Preliminary Studies.
R.P. Dinsmore, J.K. Collins, J. Carman, Colorado State University, Fort Collins, CO

Occurrence and distribution of Streptococcus uberis subtypes in milk and mammary secretions from lactating and nonlactating dairy cows.
B.M. Jayarao, B.E. Gillespie and S. P. Oliver, University of Tennessee, Knoxville, TN

Practical application of plasmid fingerprinting in the control of Staphylococcus aureus mastitis.
R. Piccinini, P. Moroni, A. Zepponi and A. Zecconi, University of Milan, Milan, Italy

Subtyping Streptococcus uberis by repetitive sequence-based polymerase chain reaction.
K. Ajariyakhajorn, R.J. Farnsworth, V. Kapur, and M.A. Mellencamp, University of Minnesota, St. Paul, MN

Determination of alpha-toxin antibodies against Staphyloccus aureus and phagocytic ability postimmunization in rabbits.
H.R. Han and H.M. Park, Seoul National University, Seoul, Korea, and D. Kim Kangwon National University, Korea

Detection of M-like protein and lipoteichoic acid in Streptococcus dysgalactiae isolated from bovine mammary secretions.
L.F. Calvino, D.A. Luther, R.A. Almeida and S.P. Oliver, University of Tennessee, Knoxville, TN, M.S. Bronze, University of Tennessee, Memphis, TN and J.J. Drabick, Walter Reed Army Institute of Research, Washington, DC

Mammary epthelial cell invasion: a common virulence attribute among bovine mastitis pathogens.
R.A. Almeida and S.P. Oliver, University of Tennesse, Knoxville, TN, K.R. Matthews, Rutgers University, New Brunswick, NJ

Influence of clinical mastitis during early lactation on reproductive performance of Jersey cows.
A.R. Barker, R.N. Schrick, M.J. Lewis, H.H. Dowlen, A.M.. Saxton and S.P. Oliver, University of Tennesse, Knoxville, TN

APPENDIX A

Summary of Peer-Reviewed Publications on Efficacy of Premilking and Postmilking Teat Disinfectants Published Since 1980 (1997 Update)


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