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- Ambulatory Resident, College of Veterinary Medicine, The Ohio State University, 1975-76.
- Associate General Practitioner, Scott Veterinary Hospital, Stephenville Texas, 1976-78.
- Graduate Research Associate, Ohio Agricultural Research and Development Center,
Department of Veterinary Science, 1978-83.
- Assistant Professor, College of Veterinary Medicine, Mississippi State University,
1983-84.
- Assistant Professor, Department of Veterinary Clinical Medicine and Surgery, College of
Veterinary Medicine, 1984-1990.
- Visiting epidemiologist for the National Animal Health Monitoring System in Ft. Collins,
CO (under USDA-APHIS-Veterinary Services), Sept., 1992- March, 1993.
- Associate Professor, Department of Veterinary Clinical Medicine and Surgery, College of
Veterinary Medicine, 1990-present.
- Professor, Department of Veterinary Clinical Medicine and Surgery, College of Veterinary
Medicine, 1998-present..
Publications
since 1997
Hancock-D-D. Rice-D-H. Herriott-D-E. Besser-T-E. Ebel-E-D. Carpenter-L-V. Effects of
farm manure handling practices on Escherichia coli O157 prevalence in cattle
JOURNAL OF FOOD PROTECTION 60:.363- 366, 1997.
Hancock, D.D., T.E. Besser, D.H. Rice, D.E. Herriott, and P.I. Tarr. 1996.
Longitudinal Study of Escherichia coli O157 in fourteen cattle herds. Epidemiol.
Infect. 118:193-5, 1997.
Hancock-D-D. Rice-D-H. Thomas-L-A. Dargatz-D-A. Besser-T-E.: Epidemiology of
Escherichia coli O157 in feedlot cattle. JOURNAL OF FOOD PROTECTION. 60:462- 465, 1997.
Dargatz-D-A. Wells-S-J. Thomas-L-A. Hancock-D-D. Garber-L-P.: Factors associated
with the presence of Escherichia coli O157 in feces of feedlot cattle. JOURNAL OF FOOD
PROTECTION. 60:466- 470, 1997
Besser-T-E. Gay-C-C. Gay-J-M. Hancock-D-D. Rice-D, Pritchett-L-C. Erickson-E-D.:
Salmonellosis associated with S typhimurium DT104 in the USA [letter].Vet-Rec. 140:75,
1997.
Keene-W-E. Sazie-E. Kok-J. Rice-D-H. Hancock-D-D. Balan-V-K. Zhao-T. Doyle-M-P.
An outbreak of Escherichia coli O157:H7 infections traced to jerky made from deer meat.
JAMA. 277:1229-31, 1997.
Besser-T-E. Hancock-D-D. Pritchett-L-C. McRae-E-M. Rice-D-H. Tarr-P-I: Duration
of detection of fecal excretion of Escherichia coli O157:H7 in cattle. J-Infect-Dis
175:726-9, 1997.
Hancock-D-D., Lynn-T-V., Besser-T-E., Wikse-S-E., Feasibility of preharvest food
safety control. Compendium on Continuing Ed. Prac. Vet. 19:S200-&, 1997.
Keene WE, Hedberg K, Herriott DE, Hancock DD, McKay RW, Barrett TJ, Fleming DW:
A prolonged outbreak of Escherichia coli O157:H7 infections caused by commercially
distributed raw milk. J Infect Dis. 176:815-818, 1997.
Rice DH, Hancock DD, Besser TE: Virulence assessment of bovine isolates of
Salmonella dublin. Veterinary Microbiology 56: MAY 1997, p.111-124.
Rice, DH, ED Ebel, DD Hancock, TE Besser, DE Herriot, and LV Carpenter. 1997.
Escherichia coli O157 in cull dairy cows on farm and at slaughter. Journal of Food
Protection. 60:1-2.
Besser TE, Hancock DD, LeJeune JT, Park J-H. Environmental reservoirs of
Escherichia coli O157:H7 on cattle farms. Korean J. Veterinary Public Health 21(2)165-73,
1997.
Besser TE, Rice DH, Hancock DD, Richards B: Colonization of calves with
Escherichia coli O157:H7: Infectious dose and direct contact transmission (submitted). App
Env Microbiol,
Tarr PI, Besser TE, Hancock DD, Keene WE, Goldoft M. Verotoxigenic Escherichia
coli infection: United States overview. J Food Protection. 60:1466-1471, 1997.
Lynn-T-V. Hancock-D-D. Besser-T-E. Harrison-J-H. Rice-D-H. Stewart-N-T.
Rowan-L-L. The occurrence and replication of Escherichia coli in cattle feeds. J Dairy Sci
81:1102-1108, 1998.
Krytenburg D, Hancock DD, Rice DH, Besser TE, Gay CC. Gay JM. Salmonella
enterica in cattle feeds from the Pacific Northwest. Animal Feed Sci and Tech. 75:75-79,
1998.
Hancock, DD, TE Besser, DH Rice, ED Ebel, DE Herriot, and LV Carpenter.
Mulltiple sources of Escherichia coli O157 in feedlots and dairy farms in the
Pacific Northwest. Prev. Vet. Med. 35:11-19, 1998.
Rice, DH, KM McMenamin, LC Pritchett, DD Hancock, and TE Besser. 1997. Genetic
diversity of Escherichia coli O157 isolates from 41 Pacific Northwest cattle herds.
Submitted to J. Clinical Microbiology, Aug. 1997.
Herriott DE, DD Hancock, ED Ebel, LV Carpenter , DH Rice, and TE Besser.
Association of herd management factors with colonization of dairy cattle by Shiga
toxin-positive Escherichia coli O157. J. Food Protect Vol. 61, no. 7, JUL 1998, p.802-
807.
Sanderson MW, Besser TE, Gay JM, Gay CC, Hancock DD. 1999. Fecal Escherichia
coli O157:H7 shedding patterns of orally inoculated calves. Vet Microbiol 1999 Sep
15;69(3):199-205
Besser, T. E., M. Goldoft, L. C. Pritchett, R. Khakhria, D. D. Hancock, D. H.
Rice, J. M. Gay, W. Johnson, and C. C. Gay. 2000. Multiresistant Salmonella Typhimurium
DT104 infections of humans and domestic animals in the Pacific Northwest of the United
States. Epidemiol. Infect. (in press)
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