Ed Topp Ph.D.

Image Ed Topp
Principal Research Scientist

Environmental microbiology and chemistry

    Current research and/or projects

    Assessment and management of environmental and human health risks associated with agricultural organic fertilizers of animal, poultry and human origin: Fate and impacts of pharmaceuticals, microbial pathogens, and antibiotic resistant bacteria in food animal and crop production systems.

    Research and/or project statements

    -Mitigating antimicrobial resistance in food production systems.

    -Genomics Research and Development Initiative on antimicrobial resistance [GRDI-AMR]

    Professional activities / interests

    Member, Joint Programming Initiative on AMR (JPIAMR) Science Advisory Board (2019-)

    Chair, FAO/WHO expert committee on antimicrobial resistance, crops and the environment (Rome, June 2018)

    Member, FAO/WHO roster of experts on foodborne antimicrobial resistance (2019-)

    Member, European Food Safety Authority (EFSA) working group concerning “The role of the environment in the emergence and spread of antimicrobial resistance (AMR) through the food chain” (2019-20)

    Member Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail (ANSES, France)  expertise collective : « Antibiorésistance et environnement - État et causes possibles de la contamination des milieux en France par les antibiotiques et par les bactéries résistantes aux antibiotiques et les supports génétiques de la résistance aux antibiotiques » (2019-2021)

    Education and awards

    Ph.D., Department of Microbiology, University of Minnesota, USA

    M.Sc., Department of Microbiology, Macdonald College of McGill University, Canada

    B.Sc. (Agriculture). Department of Microbiology, Macdonald College of McGill University, Canada

    Elected ‘Membre Correspondant’ of the Académie d'Agriculture de France 2016

    Government of Canada Public Service Award of Excellence for Scientific Contribution 2016

    AAFC Gold Harvest award for Career Achievement 2015

    Water and Environment Association of Ontario Research Excellence Award 2014

    NSERC Postgraduate Scholarship 1984

    Busch Fellowship, The Graduate School, University of Minnesota 1984

    Walter M. Stewart Award, The Faculty of Agriculture, McGill University 1983

    Key publications

    1. Delaquis, P.J., Bach, S.J., Bezanson, G.S., Topp, E., McKellar, R., Blais, B., and Peréz Rodriguez, F. (2014). Phenotypic diversity in Escherichia coli O157:H7 and its influence on survival in leafy vegetables. Research Project Annual Report. AAFC Project ID J-000132. (Report)

      2014 - View publication details

    2. Barret, M., Auffret, M., Gagnon, N., Topp, E., Masse, L., Massé, D.I., and Talbot, G. (2014). "Influence of seasonal temperature variation on methanogen communities and methanogenesis in manure storage tanks.", XVIth International Congress of Virology - International Union of Microbiological Societies (IUMS 2014), July 27 - August 1, 2014, Montréal, Québec, Canada. (Poster)

      2014 - View publication details

    3. Nadya, S., Allen, K.J., Johnson, R.P., Ziebell, K.A., Topp, E., Delaquis, P.J., and Bach, S.J. (2014). "A comparison of the presence of total Escherichia coli and Shiga-toxigenic E. coli in irrigation waters from an intensive agricultural region.", United Fresh 2014, Chicago, IL, USA, June 10-14, 2014, Abstract. (Poster)

      2014 - View publication details

    4. Adam, Z., Whiteduck-Leveillee, K., Cloutier, M., Chen, W., Lewis, C.T., Lévesque, C.A., Topp, E., Lapen, D.R., Tambong, J.T., Talbot, G., and Khan, I.U.H. (2014). "Draft genome sequence of Arcobacter cibarius Strain LMG21996{SUP}T{/SUP} isolated from broiler carcasses.", Genome Announcements, 2(1), pp. e00034-14. doi : 10.1128/genomeA.00034-14

      2014 - View publication details

    5. McKellar, R.C., Peréz Rodriguez, F., Harris, L.J., Moyne, A.-L., Blais, B., Topp, E., Bezanson, G.S., Bach, S.J., and Delaquis, P.J. (2014). "Evaluation of mathematical models to describe Escherichia coli O157:H7 decay on field-grown leafy vegetables.", Annual Meeting of the International Association for Food Protection (IAFP), Indianapolis, USA, August 3-6, 2014, Oral presentation. (Abstract)

      2014 - View publication details

    6. Hartmann, A. and Topp, E. (2014). "Gènes de résistance aux antibiotiques dans les effluents d’origine agricole ou urbaine. Anses - Agence nationale de sécurité sanitaire de l’alimentation, de l’environnement et du travail.", Bulletin de veille scientifique n° 25, Santé /Environnement /Travail, Décembre 2014, pp. 30-34.

      2014 - View publication details

    7. Khan, I.U.H., Cloutier, M., Topp, E., Lapen, D.R., Lévesque, C.A., Edge, T.A., Tambong, J.T., Talbot, G., and Wilkes, G.A. (2014). "Quantitative Detection and Identification of Arcobacter, Campylobacter and Helicobacter Species in a Canadian Agricultural Watershed.", XVIth International Congress of Virology - International Union of Microbiological Societies (IUMS 2014), July 27 - August 1, 2014, Montréal, Québec, Canada, July 27-August 1, 2014.

      2014 - View publication details

    8. Edge, T.A., Hill, S., Khan, I.U.H., Gannon, V.P.J., Crane, C., Collins, H.M., Johnson, R., Topp, E., and Roberts, C. (2014). "Microbial source tracking of pathogen and fecal pollution in shellfish harvesting areas in Atlantic Canada.", XVIth International Congress of Virology - International Union of Microbiological Societies (IUMS 2014), July 27 - August 1, 2014, Montréal, Québec, Canada, July 27-August 1, 2014.

      2014 - View publication details

    9. Alexander, T.W., McAllister, T.A., Stanford, K.I.M., Reuter, T.R., and Topp, E. (2014). "Characterization of Shiga toxin-producing Escherichia coli isolated from feces of cattle in commercial feedlots.", ADSA-ASAS 2014 Joint Annual Meeting, Kansas City, MO, USA, July 20-24, 2014.

      2014 - View publication details

    10. Khan, I.U.H., Gannon, V., Jokinen, C.C., Kent, R., Koning, W., Lapen, D.R., Medeiros, D., Miller, J., Neumann, N.F., Phillips, R., Schreier, H., Topp, E., van Bochove, E., Wilkes, G., Edge, T.A. (2014). A national investigation of the prevalence and diversity of thermophilic Campylobacter species in agricultural watersheds in Canada. Water Research, [online] 61 243-252. http://dx.doi.org/10.1016/j.watres.2014.05.027

      2014 - View publication details

    11. McKellar, R.C., Peréz-Rodríguez, F., Harris, L.J., Moyne, A.l., Blais, B., Topp, E., Bezanson, G., Bach, S., Delaquis, P. (2014). Evaluation of different approaches for modeling Escherichia coli O157:H7 survival on field lettuce. International Journal of Food Microbiology, [online] 184 74-85. http://dx.doi.org/10.1016/j.ijfoodmicro.2014.04.026

      2014 - View publication details

    12. Simmons, K., Rempel, H., Block, G., Forgetta, V., Vaillancourt, R., Malouin, F., Topp, E., Delaquis, P., Diarra, M.S. (2014). Duplex PCR methods for the molecular detection of Escherichia fergusonii isolates from broiler chickens. Applied and Environmental Microbiology, [online] 80(6), 1941-1948. http://dx.doi.org/10.1128/AEM.04169-13

      2014 - View publication details

    13. Macherius, A., Lapen, D.R., Reemtsma, T., Römbke, J., Topp, E., Coors, A. (2014). Triclocarban, triclosan and its transformation product methyl triclosan in native earthworm species four years after a commercial-scale biosolids application. Science of the Total Environment, [online] 472 235-238. http://dx.doi.org/10.1016/j.scitotenv.2013.10.113

      2014 - View publication details

    14. Adam, Z., Whiteduck-Léveillée, K., Cloutier, M., Chen, W., Lewis, C.T., Lévesque, C.A., Topp, E., Lapen, D.R., Tambong, J.T., Talbot, G., Khan, I.U.H. (2014). Draft genome sequences of two Arcobacter strains isolated from human feces. Genome Announcements, [online] 2(2), http://dx.doi.org/10.1128/genomeA.00113-14

      2014 - View publication details

    15. Kolotilin, I., Topp, E., Cox, E., Devriendt, B., Conrad, U., Joensuu, J.J., Stöger, E., Warzecha, H., McAllister, T.A., Potter, A., McLean, M.D, Hall, J.C., and Menassa, R. (2014). "Plant-based solutions for veterinary immunotherapeutics and prophylactics.", Veterinary Research, 45(1: Article number 117), pp. 1-12. doi : 10.1186/s13567-014-0117-4

      2014 - View publication details

    16. Wilkes, G., Brassard, J., Edge, T.A., Gannon, V., Gottschall, N., Jokinen, C.C., Jones, T.H., Khan, I.U.H., Marti, R., Sunohara, M.D., Topp, E., Lapen, D.R. (2014). Long-term monitoring of waterborne pathogens and microbial source tracking markers in paired agricultural watersheds under controlled and conventional tile drainage management. Applied and Environmental Microbiology, [online] 80(12), 3708-3720. http://dx.doi.org/10.1128/AEM.00254-14

      2014 - View publication details

    17. Rahube, T.O., Marti, R., Scott, A., Tien, Y.C., Murray, R., Sabourin, L., Zhang, Y., Duenk, P., Lapen, D.R., Topp, E. (2014). Impact of fertilizing with raw or anaerobically digested sewage sludge on the abundance of antibiotic-resistant coliforms, antibiotic resistance genes, and pathogenic bacteria in soil and on vegetables at harvest. Applied and Environmental Microbiology, [online] 80(22), 6898-6907. http://dx.doi.org/10.1128/AEM.02389-14

      2014 - View publication details

    18. Sunohara, M.D., Craiovan, E., Topp, E., Gottschall, N., Drury, C.F., Lapen, D.R. (2014). Comprehensive nitrogen budgets for controlled tile drainage fields in eastern Ontario, Canada. Journal of Environmental Quality, [online] 43(2), 617-630. http://dx.doi.org/10.2134/jeq2013.04.0117

      2014 - View publication details

    19. Marti, R., Tien, Y.C., Murray, R., Scott, A., Sabourin, L., Topp, E. (2014). Safely coupling livestock and crop production systems: How rapidly do antibiotic resistance genes dissipate in soil following a commercial application of swine or dairy manure?. Applied and Environmental Microbiology, [online] 80(10), 3258-3265. http://dx.doi.org/10.1128/AEM.00231-14

      2014 - View publication details

    20. Diarra, M.S., Delaquis, P., Rempel, H., Bach, S., Harlton, C., Aslam, M., Pritchard, J., Topp, E. (2014). Antibiotic resistance and diversity of Salmonella enterica serovars associated with broiler chickens. Journal of Food Protection, [online] 77(1), 40-49. http://dx.doi.org/10.4315/0362-028.JFP-13-251

      2014 - View publication details

    Research facility

    1391 Sandford Street
    London, ON N5V 4T3


    Adjunct, University of Western Ontario, Department of Biology.

    Special Graduate Faculty, University of Guelph, Ontario Veterinary College, Department of Pathobiology

    Canadian Society of Microbiologists (CSM, President 2010-2011).

    Canadian Soil Science Society (CSSS)

    American Society for Microbiology (ASM).

    International Society for Microbial Ecology (ISME).

    Society of Environmental Toxicology and Chemistry (SETAC).

    Soil Science Society of America (SSSA).