Bach, Susan, Ph.D.
Research ScientistContact Information:
4200 Highway 97
Box 5000
Summerland, British Columbia V0H 1Z0
Telephone: 250-494-6398
Fax: 250-494-0755
Email: susan.bach@agr.gc.ca
Areas of Expertise:
- horticultural products
- food safety
- control of e. coli o157:h7 in cattle
- antimicrobial resistance
- bacteriophages
- human pathogens
- molecular biology / microbiology
Current Projects:
- The effects of on-farm practices, such as manure application and the use of irrigation water, on the presence of human pathogens (E. coli O157:H7, Listeria, Salmonella) on foods of plant origin and their persistence in the environment
- The use of molecular methods for the detection and enumeration of E. coli O157:H7 from foods of plant origin
Research Publications:
The links below lead to abstracts with access to full text.2013:
- Dinu, L.-D. and Bach, S.J. (2013). "Detection of viable but non-culturable Escherichia coli O157: H7 from vegetable samples using quantitative PCR with propidium monoazide and immunological assays.", Food Control, 31(2), pp. 268-273. doi : 10.1016/j.foodcont.2012.10.020
2012:
- Bach, S.J., Cook, S.R., Wang, Y., Stanford, K.I.M., Johnson, R.P., and McAllister, T.A. (2012). "Escherichia coli O157 bacteriophages: Lytic activity and effects on fermentation in ruminal batch culture.", Canadian Journal of Animal Science, 92(4), pp. 545-550. doi : 10.4141/cjas2012-084
- Bezanson, G.S., Delaquis, P.J., Bach, S.J., McKellar, R., Topp, E., Gill, A.O., Blais, B., and Gilmour, M. (2012). "Comparative Examination of Escherichia coli O157:H7 Survival on Romaine Lettuce and in Soil at Two Independent Experimental Sites.", Journal of Food Protection, 75(3), pp. 480-487. doi : 10.4315/0362-028X.JFP-11-306
- Toivonen, P.M.A., Lu, C., Bach, S.J., and Delaquis, P.J. (2012). "Modulation of wound-induced hydrogen peroxide and its influence on the fate of Escherichia coli O157:H7 in cut lettuce tissues.", Journal of Food Protection, 75(12), pp. 2208-2212. doi : 10.4315/0362-028X.JFP-12-208
- Yemiş, G.P., Pagotto, F.J., Bach, S.J., and Delaquis, P.J. (2012). "Thermal Tolerance and Survival of Cronobacter sakazakii in Powdered Infant Formula Supplemented with Vanillin, Ethyl Vanillin, and Vanillic Acid.", Journal of Food Science, 77(9), pp. M523-M527. doi : 10.1111/j.1750-3841.2012.02834.x
2011:
- Dinu, L.-D. and Bach, S.J. (2011). "Induction of viable but nonculturable Escherichia coli O157:H7 in the phyllosphere of lettuce: A food safety risk factors.", Applied and Environmental Microbiology, 77(23), pp. 8295-8302. doi : 10.1128/AEM.05020-11
- Toivonen, P.M.A., Lu, C., Delaquis, P.J., and Bach, S.J. (2011). "Slicing under chlorinated water improves the disinfection of fresh-cut romaine lettuce.", Journal of Food Protection, 74(12), pp. 2142-2147. doi : 10.4315/0362-028X.JFP-11-194
- Yemiş, G.P., Pagotto, F.J., Bach, S.J., and Delaquis, P.J. (2011). "Effect of vanillin, ethyl vanillin, and vanillic acid on the growth and heat resistance of cronobacter species.", Journal of Food Protection, 74(12), pp. 2062-2069. doi : 10.4315/0362-028X.JFP-11-230
2010:
- Stanford, K.I.M., Bach, S.J., Stephens, T.P., and McAllister, T.A. (2010). "Effect of Rumen Protozoa on Escherichia coli O157:H7 in the Rumen and Feces of Specifically Faunated Sheep.", Journal of Food Protection, 73(12), pp. 2197-2202.
2009:
- Bach, S.J., Johnson, R.P., Stanford, K.I.M., and McAllister, T.A. (2009). "Bacteriophages reduce Escherichia coli O157:H7 levels in experimentally inoculated sheep.", Canadian Journal of Animal Science, 89(2), pp. 285-293. doi : 10.4141/CJAS08083
- Diarra, M.S., Giguère, K., Malouin, F., Lefebvre, B., Bach, S.J., Delaquis, P.J., Aslam, M., Ziebell, K.A., and Roy, G. (2009). "Genotype, serotype, and antibiotic resistance of sorbitol-negative Escherichia coli isolates from feedlot cattle.", Journal of Food Protection, 72(1), pp. 28-36.
- Dinu, L.-D., Delaquis, P.J., and Bach, S.J. (2009). "Nonculturable Response of Animal Enteropathogens in the Agricultural Environment and Implications for Food Safety.", Journal of Food Protection, 72(6), pp. 1342-1354.
- Rozema, E.A., Stephens, T.P., Bach, S.J., Okine, E.K., Johnson, R.P., Stanford, K.I.M., and McAllister, T.A. (2009). "Oral and Rectal Administration of Bacteriophages for Control of Escherichia coli O157:H7 in Feedlot Cattle.", Journal of Food Protection, 72(2), pp. 241-250.
- Wang, Y., Xu, Z., Bach, S.J., and McAllister, T.A. (2009). "Sensitivity of Escherichia coli to Seaweed (Ascophyllum nodosum) Phlorotannins and Terrestrial Tannins.", Asian-Australasian Journal of Animal Science, 22(2), pp. 238-245.
Other Science Related Publications:
2012:
- Delaquis, P.J. and Bach, S.J. (2012). "Resistance and sub-lethal damage.", in Gómez-López, V.M. (ed.) - Decontamination of Fresh and Minimally Processed Produce, Wiley - Blackwell, Chapter 4, pp. 77-86.
- Diarra, M.S., Rempel, H., Bach, S.J., Harlton, C.E., Delaquis, P.J., Pritchard, J., Aslam, M.N., Leslie, M., and Topp, E. (2012). "Distribution of antibiotic resistance phenotypes and genotypes among Salmonella spp. Isolated from broiler chickens in British Columbia.", 101st Annual Meeting of the International Association of Food Protection (IAFP 2012), Rhode Island Convention Center, Providence, RI, USA, July 22-25, 2012, Poster ID# 2398. (Poster)
2011:
- Bach, S.J., Lu, C., Delaquis, P.J., and Toivonen, P.M.A. (2011). "Cutting Romaine lettuce while submerged in sanitizer improves efficacy of sodium hypochlorite.", The Grower, 61(5), pp. 20.
- Toivonen, P.M.A., Lu, C., Delaquis, P.J., and Bach, S.J. (2011). "Timing of sanitizer application reduces microbial counts on fresh-cut Romaine lettuce.", 2nd ISHS International Conference on Quality Management of Fresh Cut Produce: Convenience Food for a Tasteful Life, Università degli Studi di Torino, Torino, Italy, July 17-21, 2011.
2010:
- Bach, S.J., Leblanc, D., and Lin, P. (2010). "The influence of chlorine and low temperature on the induction of the viable but non-culturable state in Escherichia coli 0157:H7.", 2010 Canadian Institute of Food Science & Technology (CIFST) and AAFC Conference, Fairmont Winnipeg Hotel, Winnipeg, MB, Canada, May 30-June 1, 2010, # 02-2. (Abstract)
- Toivonen, P.M.A., Lu, C., Delaquis, P.J., and Bach, S.J. (2010). "Evaluation of timing for application of sanitizing washes to reduce microbial counts on Romaine lettuce.", 14th Annual Federal Food Safety and Nutrition Research Meeting (FFSNRM), Ottawa, ON, Canada, November 3-4, 2010, pp. 28.
2009:
- Bach, S.J. (2009). "On-farm Food Safety and Water Quality: Just What Does a Test Result Mean?", 51st Annual Horticulture Growers' Short Course, Tradex, Abbotsford Airport, Abbotsford, BC, Canada, February 14-16, 2009.
- Bach, S.J. and Delaquis, P.J. (2009). "The origin and spread of human pathogens in fruit production systems.", in Fan, X, Miemira, B., Doona, C., Feeherry, F., and Gravani, B. (eds.) - Microbial Safety of Fresh Produce: Challenges, Perspectives and Strategies, Wiley - Blackwell, Chapter 2, pp. 43-54.
- Delaquis, P.J., Bach, S.J., LeBlanc, D.I., Brassard, J., Houde, A., Villeneuve, S., Bezanson, G.S., Diarra, M.S., Topp, E., Blais, B., Gajadhar, A., Bisaillon, J.-R., Fazil, A.M., Gilmour, M., Mattison, K., and Bidawid, S. (2009). "A systems-based approach for the assessment of microbiological threats to the food supply.", 13th Annual Federal Food Safety and Nutrition Research Meeting (FFSNRM), Ottawa, ON, Canada, November 4-5, 2009. (Presentation)