Adjunct Associate Professor, Environmental Health, School of Public Health
Degrees
D.V.M. 1984 Michigan State University, College of Veterinary Medicine
Ph.D. 1992 University of Minnesota, Veterinary Medicine Graduate Program
Diplomate, American College of Veterinary Preventive Medicine
Research Interests
Epidemiologic studies related to the control of manure-cycle pathogens
in dairy cattle and other food-producing animals, including Mycobacterium
paratuberculosis (Johne's disease) and Salmonella spp.
Use of analytic epidemiologic techniques to evaluate management factors
associated with economically important disease conditions in livestock, including
monitoring and surveillance, herd prevalence estimation, risk factor modeling,
attributable risk estimation, and use of data from complex surveys.
Instructional areas
Courses offered:
Clinical Epidemiology and Advanced Clinical Epidemiology
Veterinary Public Health and Advanced Veterinary Public Health Clinical
Rotations
Monitoring and Surveillance of Foodborne Diseases of Humans and Animals
Publications
Some representative Publications
Wells SJ, Fedorka-Cray PJ, et al. 2001. Fecal shedding of Salmonella spp.
by dairy cows on-farm and at cull cow markets. Journal of Food Protection,
64:3-11.
Wells SJ , Whitlock RH, et al. 2002. Sensitivity of test strategies used
in the U.S. Voluntary Johne's Disease Herd Status Program for detection
of Mycobacterium paratuberculosis in dairy cattle herds . Journal
of the American Veterinary Medical Association, 220:1053-1057.
Wells SJ , Whitlock RH, et al. 2002. Evaluation of bacterial culture of
pooled fecal samples for detection of Mycobacterium paratuberculosis . American
Journal of Veterinary Research, 63:1207-1211.
Wells SJ , Godden S, et al. 2003. Evaluation of bacteriologic culture
of individual and pooled fecal samples for detection of Mycobacterium
paratuberculosis in dairy cattle herds, Journal of the American
Veterinary Medical Association, 223:1022-1025.
Fossler C, Wells SJ, et al. 2004. Prevalence of Salmonella spp. on conventional
and organic dairy farms. Journal of the American Veterinary Medical Association,
225:567-573.
Raizman EA, Wells SJ, et al. 2004. The distribution of Mycobacterium avium
subsp. paratuberculosis in the environment surrounding Minnesota dairy farms. Journal
of Dairy Science, 87:2959-2966.
Raizman EA, Wells SJ, et al. 2005. Mycobacterium avium subsp. paratuberculosis
from free-ranging deer and rabbits surrounding Minnesota dairy herds. Canadian
Journal of Veterinary Research, 69:32-38.
Fossler CP, Wells SJ, et al. 2005. Cattle and environmental sample-level
factors associated with presence of Salmonella in a multi-state study of
conventional and organic dairy farms. Preventive
Veterinary Medicine, 67:39-53.
Fossler CP, Wells SJ, et al. 2005. Herd-level factors associated with isolation
of Salmonella in a multi-state study of conventional and organic dairy
farms I. Salmonella shedding in cows. Preventive Veterinary Medicine Sep
12;70(3-4):257-277.
Fossler CP, Wells SJ, et al. 2005. Herd-level factors associated with isolation
of Salmonella in a multi-state study of conventional and organic dairy
farms II. Salmonella shedding in calves. Preventive Veterinary Medicine Sep
12;70(3-4):279-291.
Raizman E, Wells SJ, et al. 2006. Characterization of Minnesota dairy
herds participating in a Johne's Disease Control Program and Evaluation
of the Program Risk Assessment Tool . Preventive Veterinary Medicine.
75(1-2):22-33.
Also, for a listing of recent publications, refer to PubMed,
a service provided by the National Library of Medicine.
Editorial Board
Preventive Veterinary Medicine
Current Funding
JDIP: Johne's disease Integrated Program in research, education,
and extension, USDA-CSREES NRICGP Integrated – Animal and
Plant Biosecurity, 2004-2007 .
Evaluation of Critical Control Points in Youngstock and Adult Dairy
Cow Management to Reduce Transmission of Mycobacterium paratuberculosis , USDA-CSREES
NRICGP Animal Protection, 2004-2007.
Evaluation of R egional Variation in the Epidemiology of Johne's
Disease in Cattle Dense Regions in the Americas (US, Uruguay, Bolivia).
USDA-Foreign Agricultural Service, 2005-2006.
Johne's disease control education and development initiative, Minnesota
Board of Animal Health , 2006-2007.
Honors and Awards
CVM Graduate Student Teaching
Incentive Award
1997
CVM Senior Student Teaching
Incentive Award
1999
CVM Outstanding Faculty Award presented by
College Civil Service Employees
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