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Food Science and Human Nutrition Department

Food Science and Human Nutrition Department

Dr. Soohyoun Ahn


Dr. Ahn's research interest is to develop rapid, inexpensive, and simple assays for simultaneous detection of multiple pathogens in foods or in the environment.


  • Research


    Development of rapid and sensitive detection assay for pathogens and biological toxins in foods is critical for food safety, bio-security and clinical diagnosis. Dr. Ahn’s research interest is to develop rapid, inexpensive and simple assays for simultaneous detection of multiple pathogens in foods or in the environment. For the development of these assays, she utilizes various techniques, including immunomagnetic separation, ELISA, multiplex PCR, lateral flow assays, bead-based sensors and microarray. She is particularly interested in building a small, portable microfluidic platform, which will be ideal for field assays. Current research projects include: (1) development of bead-based suspension microarrays for simultaneous detection and characterization of multiple foodborne pathogens, (2) development of immunofluorescence assay for simultaneous detection of Salmonella and E. coli O157:H7, and (3) Study of STEC prevalence in small-sized cattle farms.

    Selected Publications:

    • Long, W., Pao, S., Inserra, P., Westbrook, E. and Ahn, S. 2011. Efficacy of Ozone Produce Washers in Reducing Natural and Artificially Inoculated Microorganisms on Roma Tomatoes and Green Onions. Journal of Food Safety, 31:268-275
    • Jarquin, R., Hanning, I., Ahn, S. and Ricke, S.C. 2009. Development of Rapid Detection and Genetic Characterization of Salmonella in Poultry Breeder Feeds. Sensors, 9:5308-5323.
    • Larson, C.L., Shah, D.H., Dhillon, A.S., Call, D.R., Ahn, S.,Haldorson, G.J., Davitt, C. and Konkel, M.E. 2008. Campylobacter jejuni invade chicken LMH cells inefficiently and stimulate differential expression of the chicken CXCLi1 and CXCLi2 cytokines. Microbiology, 154:3835-3847.
    • Ahn, S. and Durst, R.A. 2008. Detection of Cholera Toxin in Saefood Using a Ganglioside-Liposome Immunoassay. Analytical and Bioanalytical Chemistry, 391:473-476
    • Ahn, S., Kulis, D.M., Erdner, D.L., Anderson, D.M., and Walt, D.R. 2006. Fiber-Optic Microarray for Simultaneous Detection of Harmful Algal Bloom Species Using Sandwich-Hybridization. Applied and Environmental Microbiology, 72:5742-5749.
    • Song, L., Ahn, S.and Walt, D.R. 2006. Fiber-optic Microsphere-based Arrays for Multiplexed Biological Warfare Agent Detection. Analytical Chemistry, 78:1023-1033.
  • Teaching

    Courses Taught

    • FOS 4731/5731 Government Regulations and the Food Industry
  • Extension

    Workshop:  How to Start a Food Business in Florida

    For the past decade, the food business in America has been changing, as more and more people have started their own small-scale food production companies to sell to farmers markets, restaurants and other local businesses. Since the passage of the Cottage Food Law in Florida, the number of small food businesses has been on a steep increase.  But to run a successful business in a competitive food market, you’ll need a good business plan and basic understanding about food processing, packaging, marketing and regulatory requirements. UF/IFAS Extension’s Food Entrepreneurship program can help get you started on your journey to success.

    How to Start a Food Business in Florida was a one-day workshop that provided general information on food safety and quality, basic food science, business planning, and federal and state regulatory requirements for food business.

    For a PDF version of the Food Entrepreneurship Brochure, click here.

    For more information, please contact  Dr. Soohyoun Ahn

Contact Information

Aquatic Food Products Lab
586 Newell Dr.
Room 215
P.O. Box 110370
Gainesville, FL 32611



  • Education
    • Ph.D. Cornell University; Food Science & Technology (Minor: Microbiology, Biochemistry), 2003
    • M.S. Yonsei University (Seoul, South Korea); Food Science & Biotechnology, 1998
    • B.S. Yonsei University (Seoul, South Korea); Food Science & Biotechnology, 1996
  • Publications