M: FOOD MICROBIOLOGY AND SAFETY
Inhibition of Bacterial and Filamentous Fungal Growth in High Moisture, Nonsterile Corn with Intermittent Pumping of Trans-2-Hexenal Vapor
Article first published online: 18 JUL 2013
Journal of Food Science © 2013 Institute of Food Technologists® No claim to original US government works
Journal of Food Science
Volume 78, Issue 7, pages M1029–M1035, July 2013
How to Cite
De Lucca, A. J., Carter-Wientjes, C. H., Boué, S. M., Lovisa, M. P. and Bhatnagar, D. (2013), Inhibition of Bacterial and Filamentous Fungal Growth in High Moisture, Nonsterile Corn with Intermittent Pumping of Trans-2-Hexenal Vapor. Journal of Food Science, 78: M1029–M1035. doi: 10.1111/1750-3841.12151
- Issue published online: 18 JUL 2013
- Article first published online: 18 JUL 2013
- Manuscript Accepted: 4 APR 2013
- Manuscript Received: 12 OCT 2012
Trans-2-hexenal (T2H), a plant-produced aldehyde, was intermittently pumped over a 7 d period into a small, bench top model of stored corn (nonsterile, moisture content about 23%). Naturally occurring bacteria and fungi, including added Aspergillus flavus, grew rapidly on corn not treated with T2H vapor. However, intermittently pumped T2H (30 min per 2 h or 30 min per 12 h) significantly reduced bacterial and fungal viable populations, with nearly 100% fungal viability loss observed after either (1) one day of pumping at the 30 min per 2 h rate or (2) pumping cycles of 30 min per 12 h period over the initial 48 to 72 h of incubation. Data suggest that short-term intermittent fumigation of stored corn with T2H could prevent growth of bacteria and mycotoxigenic fungi such as A. flavus.
Intermittent pumping of volatile T2H for as little as 30 min per 12 h period over the initial 72 h could prevent the growth of naturally occurring bacteria and fungi, especially mycotoxigenic fungi, on stored, nonsterile high moisture corn.