Affiliation:
1. Toxicology & Mycotoxin Research Unit, U.S. National Poultry Research Center, Agricultural Research Service, U.S. Department of Agriculture, 950 College Station Road, Athens, GA 30605, USA
2. Department of Poultry Science, University of Georgia, 110 Cedar Street, Athens, GA 30602, USA
Abstract
Organic acids and essential oils are commonly used in the poultry industry as antimicrobials and for their beneficial effects on gut health, growth performance, and meat quality. A common postharvest storage fungal colonist, Aspergillus flavus, contaminates corn, the primary component of poultry feed, with the highly detrimental mycotoxin, aflatoxin. Aflatoxin adversely affects poultry feed intake, feed conversion efficiency, weight gain, egg production, fertility, hatchability, and poultry meat yield. Both organic acids and essential oils have been reported to inhibit the growth of A. flavus. Thus, we evaluated if the inhibitory synergy between combined essential oils (cinnamon, lemongrass, and oregano) and organic acids (acetic, butyric, and propionic) prevents A. flavus growth. The study confirmed that these compounds inhibit the growth of A. flavus and that synergistic interactions do occur between some of them. Overall, cinnamon oil was shown to have the highest synergy with all the organic acids tested, requiring 1000 µL/L air of cinnamon oil and 888 mg/kg of butyric acid to fully suppress A. flavus growth on corn kernels. With the strong synergism demonstrated, combining certain essential oils and organic acids offers a potentially effective natural method for controlling postharvest aflatoxin contamination in poultry feed.
Subject
Health, Toxicology and Mutagenesis,Toxicology
Reference46 articles.
1. Mycotoxins;Bennett;Clin. Microbiol. Rev.,2003
2. Food fermentation and mycotoxin detoxification: An African perspective;Adebiyi;Food Control,2019
3. Technological and community-based methods to reduce mycotoxin exposure;Alberts;Food Control,2017
4. Application of organic acids in poultry nutrition;Hajati;Int. J. Avian. Wildl. Biol.,2018
5. A novel fungal killing mechanism of propionic acid;Yun;FEMS Yeast Res.,2016