Ynte Schukken Director, Quality Milk Production

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					Ynte Schukken                                                          clinical mastitis caused by S.aureus and E. Coli studied by
Director, Quality Milk Production Services                             fingerprinting. A.J.V.R. 57:39-42, 1996.
Department of Population Medicine                                      van Schaik G, Lotem M, Schukken YH. Trends in somatic cell
and Diagnostic Sciences                                                counts, bacterial counts, and antibiotic residue violations in
S3119 Schurmann Hall                                                   New York State during 1999-2000. J Dairy Sci. 2002 85:782-
607-255-8202                                                           789.
website: http://qmps.vet.cornell.edu                                   R.N. Zadoks, W.B. van Leeuwen, D. Kreft, L.K. Fox, H.W.
                                                                       Barkeman, Y.H. Schukken and A. van Belkum. Comparison of
                                                                       Staphylococcus aureus from skin, milking equipment and
                                                                       bovine milk by phage typing, PFGE and binary typing. J. Clin
                                                                       Microbiology 40:3894-3902 2002.

                                                                       L.R. Nielsen, Y. H. Schukken, Y.T. Grohn, A.K. Ersboll,
                                                                       Salmonella Dublin infection in dairy cattle: risk factors for
                                                                       becoming a carrier. Prev. Vet. Med. Aug. 30; 65(1-2): 47-62,

                                                                       Y.T. Grohn, D. J. Wilson, R.N. Gonzalez, J.A. Hertl, H.
                                                                       F.Schulte, G. J. Gennett, Y.H. Schukken, Effect of pathogen-
                                                                       specific clinical mastitis on milk yield in dairy cows. J. Dairy
                                                                       Sci. Oct:87(10): 3358-74. 2004.

                                                                       K.K. Nightingale, Y.H. Schukken, C.R. Nightingale, E. D.
                                                                       Fortes, J.J. Ho, Z. Her, Y.T. Grohn, P.L. McDonough, M.
Ynte Schukken is an Associate Professor of Epidemiology and            Weidmann,        Ecology and transmission of Listeria
Herd Health in the Department of Population Medicine and               monocytogenes infecting ruminants and farm environment.
Diagnostic Sciences. Dr. Schukken received his DVM from the            Appl. Environ. Microbiol. Aug.70(8): 4458-67, 2004.
University of Utrecht in 1985, his M.Sc. from Cornell University
in 1987, and his Ph.D. in 1990 from the University of Utrecht.         M.J. Green, L. E. Green, Y.H. Schukken, A.J. Bradley, E.J.
                                                                       Peeler, H. W. Barkema, Y. de Haas, V.J. Collis, G.F. Medley.
Current Research                                                       Somatic cell count distributions during lactation predict
                                                                       clinical mastitis. J. Dairy Sci. May 87(5): 1256-64, 2004.
My current research interests are involving 1) udder health, food
safety and milk quality in well managed dairy herds 2)                 R.N. Zadoks, R.N. Gonzalex, K.J. Boor, Y.H. Schukken.
understanding population dynamics of infectious diseases in            Mastitis-causing streptococci are important contributors to
animal populations, and 3) application of epidemiological,             bacterial counts in bulk tank milk. J. Food Prot
statistical and mathematical methods to animal disease research        Dec;67(12):2644-50, 2004.

Research Interests/Work in Progress                                    Sauders BD, Durak MZ, Fortes E, Windham K, Schukken
                                                                       YH, Lembo AJ Jr, Akey B, Nightingale KK, Wiedmann M.
Current research in collaboration with the faculty in the department   Molecular characterization of Listeria monocytogenes from
of food science includes:                                              natural and urban environments. J Food Prot. 69(1):93-105.
- Infection dynamics of mastitis pathogens                             2006.
- Molecular epidemiology of food borne pathogens
- S. agalactia infections in bovine and human hosts.                   Nightingale KK, Fortes ED, Ho AJ, Schukken YH, Grohn
- Antimicrobial resistance patterns in animal pathogens                YT, Wiedmann M. Evaluation of farm management practices
                                                                       as risk factors for clinical listeriosis and fecal shedding of
Selected Publications                                                  Listeria monocytogenes in ruminants. J Am Vet Med Assoc.
                                                                       Dec 1;227(11):1808-14. 2005.
Sargeant JM, Schukken YH, Leslie KE. Ontario bulk milk
somatic cell count reduction program: III. progress and                Dogan B, Schukken YH, Santisteban C, Boor KJ.
outlook. J Dairy Sci 1998 Jun;81(6):1545?54                            Distribution of serotypes and antimicrobial resistance genes
                                                                       among Streptococcus agalactiae isolates from bovine and
J. Sol, O.C. Sampimon, J.J. Snoep and Y.H. Schukken.                   human hosts. J Clin Microbiol. Dec;43(12):5899-906. 2005.
Factors Associated with Bacteriological Cure After Dry Cow
Treatment of Subclinical Staphylococcal Mastitis with
antibiotics. J.Dairy Sci 77:75-79, 1994.

T.J.G.M. Lam, L.J.A. Lipman, Y.H. Schukken, W. Gaastra
and A. Brand. Epidemiological characteristics of bovine