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Karyn Bischoff

Assistant Professor

Animal Health Diagnostic Center
College of Veterinary Medicine
Cornell University
Ithaca, New York 14853

Research and Professional Experience
Honors and Awards
Memberships and Affiliations
Selected Publications

Research Interests

Heavy metals toxicology and trace mineral imbalances are my primary interests in the field of toxicology. Currently, Analytical Toxicology is studying the kinetics of lead in cattle in the field. Lead poisoning is a common problem in cattle and the goal of our research is to prevent lead contamination of meat and milk for human consumption. Since we are using cattle exposed in the field, our work will be directly applicable to real-world situations. We have also done some work with selenium to determine optimum circulating concentration for health in goats used for milk and meat.

Analytical Toxicology is beginning a partnership with the National Veterinary Research and Quarantine Service in the Republic of Korea. Some of our joint projects will include: determining if biomarkers such as zinc protoporphyrin can be used to give accurate information on body burdens of heavy metals in cattle and other species, and GC/MS isolation of plant and fungal toxins.

Last, but not least, our laboratory has been at the forefront of several investigations of contamination of commercial pet foods by agents such as aflatoxin and melamine.

    Diplomate - 1999   American Board of Veterinary Toxicology Diplomate
    MS - 1999   Oklahoma State University, Veterinary Pathology
    DVM - 1995   University of Illinois, Doctor of Veterinary Medicine
    B.S. - 1993   University of Illinois, Veterinary Science
    B.S. - 1991   University of Wisconsin, Animal Science

Research and Professional Experience

8/2004 to present: Assistant Professor, Cornell University College of Veterinary Medicine, and Diagnostic Toxicologist, New York State Animal Health Diagnostic Center
7/2001 to 7/2004: Anatomic Pathology Resident, University of Florida College of Veterinary Medicine
5/2000 to 5/2000: Senior Research Associate, Illinois Institute of Technology
1/1999 to 9/1999: Laboratory Animal Resident, University of Alaska
1/1996 to 12/1998: Toxicology Resident, Oklahoma Animal Disease Diagnostic Laboratory, Oklahoma State University
9/1995 to 10/1995: Intern, Florida Keys Wild Bird Center, Key Largo FL
8/1994 to 9/1994: Intern, The Raptor Center, University of Minnesota
11/1994 to 12/1994: Intern, National Wildlife Health Center, United States Geological Service
6/1989 to 8/1989: Intern, Brookfield Zoo, Brookfield IL

Professional Society Memberships

American Academy of Veterinary and Comparative Toxicology
  Nominee, President Elect-Present
Council Member 2005-2008
  Awards Committee 2006-Present
American Association for the Advancement of Science
American Association of Veterinary Diagnosticians
American Board of Veterinary Toxicology
American Veterinary Medical Association
Council for Agricultural Science and Technology
Sigma Xi Research Society

Selected Publications
  1. R. Canciolo*, K. Bischoff, L. Serfilippi, J. Ebel, R. Goldstein. Clinicopathologic, histopathologic and toxicologic findings in 70 cats inadvertently exposed to pet food contaminated with melamine and cyanuric acid (2008). JAVMA 233(5):729-37.
  2. D.M. Dereszynski*, S.A. Center, J.F. Randolph, M.B. Brooks, A. G. Hadden*, K.S. Palyada*, S.P. McDonough, T. Stokol, K. L. Bischoff, H. N. Erb, S. Gluckman, S. Y. Sanders. Clinical and clinicopathologic features of food borne aflatoxin hepatotoxicity in 72 dogs (2005-2006) (2008). JAVMA 232(9):1329-37.
  3. K. Bischoff, C. Lamm*, H.N. Erb, J.R. Hillebrandt. The effects of formalin-fixation and tissue embedding of bovine liver on copper, iron, and zinc analysis (2008). JVDI 20:220-224.
  4. JFX Wellehan, A.J. Johnson, K.S. Latimer, K. Bischoff, M. Lafortune, E.R. Jacobson Identification and initial characterization of an adenovirus associated with fatal hepatic and lymphoid necrosis in a Meyer’s parrot (Poicephalus meyeri). (2005). J Av Med Surg 19(3):191-197
  5. K. Bischoff, J. Pichner, W.E. Braselton, C. Counard, D.C. Evers, W. C. Edwards. Mercury and selenium concentrations in livers and eggs of common loons (Gavia immer) from Minnesota (2002). Arch Environ Contam Toxicol. 42:71-6.
  6. K. Bischoff, S. Morgan, J. Chelsvig, D. Spencer. 4-aminopyridine poisoning of crows in the Chicago area (2001). Vet. Hum. Toxicol. 43: 350-252.
  7. K Bischoff . The toxicology of microcystin-LR: occurrence, toxicokinetics, toxicodynamics, diagnosis, and treatment (2001). Vet. Hum. Toxicol. 43: 249-247.
  8. K Bischoff, Brizzee-Buxton B, Gatto N, Edwards WC, Stair EL, Logan C*. Malicious paraquat poisoning in Oklahoma dogs (1998). Vet. Hum. Toxicol. 40: 151-153.
  9. K Bischoff, F Guale. Austrailan tea tree (Melaleuca alternifolia) oil poisoning in three purebred cats (1998). J. Vet. Diagn. Invest. 10: 208-210.
  10. K Bischoff, E Beier 3rd, WC Edwards. Methamphetamine poisoning in three Oklahoma dogs (1998). Vet. Hum. Toxicol. 40: 19-20.
  11. E Beier 3rd, K Bischoff. Flurazepam toxicosis in two dogs (1997). Vet. Hum. Toxicol. 39: 352-354.

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