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Scott McEwen

Professor   |   DVM, DVSc, (Guelph), Dip ACVP


I teach POPM*6350 Safety of Foods of Animal Origin, POPM*6540 Concepts in Environmental Health, POPM*6560 MPH Practicum and co-teach POPM*4040 Epidemiology of Foodborne Diseases. My research focuses on the epidemiology of foodborne infections in food animal populations, particularly E. coli and antibiotic resistant organisms, but also Salmonella and other pathogens. I have extensive experience in conducting epidemiological studies in cattle, poultry swine and other food animal species and has also participated in a number of studies of zoonotic infections in companion animals and in humans, including antimicrobial resistance in commensal and pathogenic bacteria. My research on antimicrobial resistant bacteria, Salmonella and E. coli O157:H7 and related organisms focuses on the distribution of fecal shedding in animals, and risk factors for infection in animals and humans. I also study the determinants of selection and assessment of human health risks from antimicrobial use in animals. I consult on food safety, antibiotic resistance, epidemiology and other veterinary public health matters with a number of governmental and non-governmental organizations at the provincial, national and international levels, notably various food animal industry groups, the Public Health Agency of Canada, Health Canada, the United States Food and Drug Administration, the Centers for Disease Control, the Alliance for the Prudent Use of Antibiotics (APUA), and the World Health Organization (WHO). 

Research Interests

My research group focuses on the epidemiology of foodborne and waterborne infections in animal and human populations. We have particular interests in E. coli O157:H7, Salmonella, Campylobacter and antibiotic resistant organisms. We seek to better understand the dynamics of these infections in animals and humans, to determine risk factors for infection, and to evaluate methods of control. I like to work with graduate students and have supervised or co-supervised over 40 MSc and 20 PhD students.


I teach graduate courses POPM*6350 Safety of Foods of Animal Origin and POPM*6540 Concepts in Environmental Health, coordinate POPM*6560 MPH Practicum, and co-teach the undergraduate course POPM*4040 Epidemiology of Foodborne Diseases. 

Professional Experience & Honours

Last 5 years:

Member, International Assessment of Research at the National Food Institute of the Technical University of Denmark, Mørkhøj, January 2010.

Chair, 2nd Meeting of the World Health Organization (WHO) Advisory Group on Integrated Surveillance of Antimicrobial Resistance (WHO-AGISAR), 5-7 June 2010, Guelph, Canada.

Member of AMR Expert Group. National Collaborating Centre for Infectious Diseases. 2010-12.      

External Assessor of Candidates. Chair in Public Health. University of Bristol. 2010.

Invited Participant. U.S. National Antimicrobial Resistance Monitoring System (NARMS) Sampling Public Meeting. St. Louis MO. July 20, 2011.

Danish Technical University. Selection Committee for Position as Senior Researcher in Antimicrobial Resistance and Global Epidemiology of Food Borne Infections. 2011.

Invited Participant. CDC Workshop: Strategic Priorities for Combating Antimicrobial Resistant Infections. December 6-7, 2011 in Atlanta, GA, USA. 2011.

Chair, 5th Meeting of the WHO Advisory Group on Integrated Surveillance of Antimicrobial Resistance 3-5 September 2013, Bogotá, Colombia.

Member, FAO committee for development of the FAO food control systems assessment tool. 2013-14.       

Member, External Peer Review of FDA Risk Assessment Approach: Drug Residues in Milk and Milk Products Risk Ranking Model and Report. January 2014.

Chair, International Assessment of Research at the National Food Institute, Technical University of Denmark. November, 2014.

Consultant on antimicrobial resistance to the Senate of Canada and Auditor General of Canada. 2014-15.

Chair, 6th Meeting of the WHO Advisory Group on Integrated Surveillance of Antimicrobial Resistance 10-12 June 2015, Seoul, South Korea.

Selected Publications

Search PubMed for additional publications by Dr. McEwen.