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. Khan, A.H., Topp, E., Scott, A., Sumarah, M., Macfie, S.M., Ray, M.B. (2015). Biodegradation of benzalkonium chlorides singly and in mixtures by a Pseudomonas sp. isolated from returned activated sludge. Journal of Hazardous Materials, [online] 299 595-602. http://dx.doi.org/10.1016/j.jhazmat.2015.07.073

      2015 - View publication details

    2. Brandt, K.K., Aamézquita, A., Backhaus, T., Boxall, A.B.A., Coors, A., Heberer, T., Lawrence, J.R., Lazorchak, J.R., Schönfeld, J., Snape, J.R., Zhu, Y.-G., and Topp, E. (2015). "Ecotoxicological assessment of antibiotics: A call for improved consideration of microorganisms.", Environment International, 85, pp. 189-205. doi : 10.1016/j.envint.2015.09.013

      2015 - View publication details

    3. Zhi, S., Li, Q., Yasui, Y., Edge, T., Topp, E., Neumann, N.F. (2015). Assessing host-specificity of Escherichia coli using a supervised learning logic-regression-based analysis of single nucleotide polymorphisms in intergenic regions. Molecular Phylogenetics and Evolution, [online] 92 72-81. http://dx.doi.org/10.1016/j.ympev.2015.06.007

      2015 - View publication details

    4. Frey, S.K., Topp, E., Khan, I.U.H., Ball, B.R., Edwards, M., Gottschall, N., Sunohara, M., Lapen, D.R. (2015). Quantitative Campylobacter spp., antibiotic resistance genes, and veterinary antibiotics in surface and ground water following manure application: Influence of tile drainage control. Science of the Total Environment, [online] 532 138-153. http://dx.doi.org/10.1016/j.scitotenv.2015.03.114

      2015 - View publication details

    5. Holman, D.B., McAllister, T.A., Topp, E., Wright, A.D.G., Alexander, T.W. (2015). The nasopharyngeal microbiota of feedlot cattle that develop bovine respiratory disease. Veterinary Microbiology, [online] 180(1-2), 90-95. http://dx.doi.org/10.1016/j.vetmic.2015.07.031

      2015 - View publication details

    6. Etienne, D., Destas, M., Lyautey, E., Marti, R., Ruffaldi, P., Georges-Leroy, M., Dambrine, E., Topp, E. (2015). Two thousand–year reconstruction of livestock production intensity in France using sediment-archived fecal Bacteroidales and source-specific mitochondrial markers. The Holocene, [online] 25(9), 1384-1393. http://dx.doi.org/10.1177/0959683615585836

      2015 - View publication details

    7. Whiteduck-Léveillée, K., Whiteduck-Léveillée, J., Cloutier, M., Tambong, J.T., Xu, R., Topp, E., Arts, M.T., Chao, J., Adam, Z., Lévesque, C.A., Lapen, D.R., Villemur, R., Talbot, G., Khan, I.U.H. (2015). Arcobacter lanthieri sp. Nov., isolated from pig and dairy cattle manure. International Journal of Systematic and Evolutionary Microbiology (IJSEM), [online] 65(8), 2709-2716. http://dx.doi.org/10.1099/ijs.0.000318

      2015 - View publication details

    8. Dhanani, A.S., Block, G., Dewar, K., Forgetta, V., Topp, E., Beiko, R.G., Diarra, M.S. (2015). Genomic comparison of non-typhoidal Salmonella enterica Serovars Typhimurium, Enteritidis, Heidelberg, Hadar and Kentucky isolates from broiler chickens. PLoS ONE, [online] 10(6), http://dx.doi.org/10.1371/journal.pone.0128773

      2015 - View publication details

    9. Jokinen, C.C., Koot, J., Cole, L., Desruisseau, A., Edge, T.A., Khan, I.U.H., Koning, W., Lapen, D.R., Pintar, K.D.M., Reid-Smith, R., Thomas, J.L., Topp, E., Wang, L.Y., Wilkes, G., Ziebell, K., van Bochove, E., Gannon, V.P.J. (2015). The distribution of Salmonella enterica serovars and subtypes insurface water from five agricultural regions across Canada. Water Research, [online] 76 120-131. http://dx.doi.org/10.1016/j.watres.2015.02.038

      2015 - View publication details

    10. Al-Rajab, A.J., Sabourin, L., Lapen, D.R., Topp, E. (2015). Dissipation of triclosan, triclocarban, carbamazepine and naproxen in agricultural soil following surface or sub-surface application of dewatered municipal biosolids. Science of the Total Environment, [online] 512-513 480-488. http://dx.doi.org/10.1016/j.scitotenv.2015.01.075

      2015 - View publication details

    11. Lawrence, J.R., Topp, E., Waiser, M.J., Tumber, V., Roy, J., Swerhone, G.D.W., Leavitt, P., Paule, A., Korber, D.R. (2015). Resilience and recovery: The effect of triclosan exposure timing during development, on the structure and function of river biofilm communities. Aquatic Toxicology, [online] 161 253-266. http://dx.doi.org/10.1016/j.aquatox.2015.02.012

      2015 - View publication details

    12. Caracciolo, A.B., Topp, E., and Grenni, P. (2015). "Pharmaceuticals in the environment: Biodegradation and effects on natural microbial communities. A Review.", Journal of Pharmaceutical and Biomedical Analysis, 106, pp. 25-36. doi : 10.1016/j.jpba.2014.11.040

      2015 - View publication details

    13. Konopka, M., Henry, H.A.L., Marti, R., Topp, E. (2015). Multi-year and short-term responses of soil ammonia-oxidizing prokaryotes to zinc bacitracin, monensin, and ivermectin, singly or in combination. Environmental Toxicology and Chemistry, [online] 34(3), 618-625. http://dx.doi.org/10.1002/etc.2848

      2015 - View publication details

    14. Barret, M., Gagnon, N., Morissette, B., Kalmokoff, M.L., Topp, E., Brooks, S.P.J., Matias, F., Neufeld, J.D., Talbot, G. (2015). Phylogenetic identification of methanogens assimilating acetate-derived carbon in dairy and swine manures. Systematic and Applied Microbiology, [online] 38(1), 56-66. http://dx.doi.org/10.1016/j.syapm.2014.11.006

      2015 - View publication details

    15. Frey, S.K., Gottschall, N., Wilkes, G., Grégoire, D.S., Topp, E., Pintar, K.D.M., Sunohara, M., Marti, R., Lapen, D.R. (2015). Rainfall-induced runoff from exposed streambed sediments: An important source of water pollution. Journal of Environmental Quality, [online] 44(1), 236-247. http://dx.doi.org/10.2134/jeq2014.03.0122

      2015 - View publication details

    16. Ross, J., Topp, E. (2015). Abundance of antibiotic resistance genes in bacteriophage following soil fertilization with dairy manure or municipal biosolids, and evidence for potential transduction. Applied and Environmental Microbiology, [online] 81(22), 7905-7913. http://dx.doi.org/10.1128/AEM.02363-15

      2015 - View publication details

    17. MacDonald, J., Doshi, K., Dussault, M., Hall, J.C., Holbrook, L., Jones, G., Kaldis, A., Klima, C.L., MacDonald, P., McAllister, T.A., McLean, M.D, Potter, A., Richman, A.S., Shearer, H., Yarosh, O., Yoo, H.S., Topp, E., and Menassa, R. (2015). "Bringing plant-based veterinary vaccines to market: Managing regulatory and commercial hurdles.", Biotechnology Advances. doi : 10.1016/j.biotechadv.2015.07.007

      2015 - View publication details

    18. Que, Z., Seidou, O., Droste, R.L., Wilkes, G., Sunohara, M., Topp, E., Lapen, D.R. (2015). Using AnnAGNPS to predict the effects of tile drainage control on nutrient and sediment loads for a river basin. Journal of Environmental Quality, [online] 44(2), 629-641. http://dx.doi.org/10.2134/jeq2014.06.0246

      2015 - View publication details

    19. Martin-Laurent, F., Marti, R., Waglechner, N., Wright, G.D., and Topp, E. (2014). "Draft genome sequence of the sulfonamide antibiotic-degrading Microbacterium sp. Strain C448. Genome Announcements.", Genome Announcements, 2(1), pp. e01113-13. doi : 10.1128/genomeA.01113-13

      2014 - View publication details

    20. 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

    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).