» Dr. Rosalee S. Hellberg
Assistant Professor

Schmid College of Science and Technology; Food Science
Dr. Rosalee S. Hellberg
Office Location:
Hashinger Science Center 204
(714) 628-2811
Lewis and Clark College, Bachelor of Arts in Biochemistry
Oregon State University, Master of Science in Food Science
Oregon State University, Ph.D. in Food Science


Dr. Rosalee Hellberg is an Assistant Professor in the Food Science Program at Chapman University. She teaches courses on General Microbiology and Food Microbiology. Prior to coming to Chapman University, Dr. Hellberg completed a fellowship program at the FDA, where she contributed to the development of rapid, DNA-based test methods for pathogenic microorganisms. Dr. Hellberg completed an M.S. and Ph.D. in Food Science and Technology at Oregon State University, studying seafood safety and fish species mislabeling. She has published over 30 peer-reviewed articles and book chapters.


Dr. Hellberg’s research interests are in food safety and mislabeling. Her research on food safety has been focused primarily on the development and application of rapid methods to detect and differentiate foodborne pathogens, such as norovirus, Salmonella, and Listeria. Traditional microbiological methods often involve a number of time-consuming culturing steps. However, incorporation of rapid methods into the workflow can greatly reduce the time required for pathogen identification. Dr. Hellberg’s research on food mislabeling has been focused on the development and application of DNA-based techniques to identify meat and seafood species in food products. She has published numerous studies that utilize methods such as DNA barcoding and real-time PCR to reveal mislabeling of food products, including pet foods, game meats, and seafood products.

Recent Creative, Scholarly Work and Publications
Hellberg RS, Chu E. 2015. Effects of climate change on the persistence and dispersal of foodborne bacterial pathogens in the outdoor environment: A review. Critical Reviews in Microbiology Online ahead of print
Kane, DE, Hellberg RS. 2016. Identification of species in ground meat products sold on the U.S. commercial market using DNA-based methods. Food Control 59: 158-163.
Quinto CA, Tinoco R, Hellberg RS. 2016. DNA barcoding reveals mislabeling of game meat species on the U.S. commercial market. Food Control 59: 386-392.
Okuma TA, Hellberg RS. 2015. Identification of meat species in pet foods using a real-time polymerase chain reaction (PCR) assay. Food Control 50: 9-17.
Hellberg RS, Li F, Sampath R, Yasuda I, Carolan H, Wolfe J, Brown M, Alexander R, Williams-Hill DM, Martin WB. 2014. Rapid detection and differentiation of human noroviruses using RT-PCR coupled to electrospray ionization mass spectrometry. Food Microbiology 44: 71-80.
Hellberg RS, Kawalek MD, Van KT, Shen Y, Williams-Hill DM. 2014. Comparison of DNA extraction and PCR setup methods for use in high-throughput DNA barcoding of fish species. Food Analytical Methods 7(10): 1950-1959.
Levy DJ, Beck NK, Kossik AL, Patti T, Meschke JS, Calicchia M, Hellberg RS. 2014. Microbial safety and quality of fresh herbs from Los Angeles, Orange County, and Seattle farmers’ markets. Journal of the Science of Food and Agriculture Online ahead of print.
Hellberg RS, Martin KG, Keys AL, Haney CJ, Shen Y, and Smiley RD. 2013. 16S rRNA partial gene sequencing for the differentiation and molecular subtyping of Listeria species. Food Microbiology 36:231-240.
Hellberg RS, Haney CJ, Shen Y, Cheng C-M, Williams-Hill DM, Martin WB. 2012. Development of a custom 16S rRNA gene library for the detection and molecular subtyping of Salmonella enterica. Journal of Microbiological Methods 91: 448-458.
Pierce SE, Bell RL, Hellberg RS, Cheng C-M, Chen K-S, Williams-Hill DM, Martin WB, Allard MW. 2012. Detection and identification of Salmonella enterica, Escherichia coli, and Shigella spp. via PCR-ESI-MS: isolate testing and analysis of food samples. Applied and Environmental Microbiology 78(23): 8403-8411.
Hellberg RS, Mireles DeWitt CA, Morrissey MT. 2012. Risk-benefit analysis of seafood consumption: a review. Comprehensive Reviews in Food Science and Food Safety 11(5): 490-517.