Dr Gregory R Siragusa, Senior Principal Scientist – Microbiology, DuPont, obtained his Ph.D. in 1989 from the University of Arkansas in food microbiology under the professorship of Dr. Michael Johnson. He holds B.S. and M.S. degrees in Microbiology from Louisiana State University.
     From 1990 until 2007 he was a research microbiologist and lead scientist with the Agricultural Research Service (ARS-USDA) at Clay Center, Nebraska, with the U.S. Meat Animal Research Center and the Poultry Microbiology Safety Research Unit in Athens, Georgia. He was named Outstanding Lead Scientist for Food Safety Microbiology within the ARS. In 2007 he joined Agtech Products in Waukesha, Wisconsin, as director of R&D for poultry gut microbiology/probiotics and food quality and safety. He specializes in food microbiology and microbial ecology of foods and intestinal or gut microbial ecology and its modulation through probiotics.
     Following acquisitions by Danisco and DuPont, Siragusa is currently a senior principal scientist in the Antimicrobials and Antioxidants Research Team conducting research on food microbial ecology (detect and protect) and enzymatic antimicrobial enzyme applications for food preservation. He also directs field work in Kenya at the Egerton University and in developing new food antimicrobials with colleagues in Brabrand, Denmark.