Effect of chemical treatment of poultry feed on survival of Salmonella.

After treatment with a chemical preservative [Myco Curb (Kemin Industries, Des Moines, IA) at .25, .5, .75, or 1.0%], sterilized commercial poultry feed was contaminated with either Salmonella typhimurium ATCC 6994 or with a strain isolated from commercial broiler carcasses. All treatments resulted in the elimination of detectable Salmonella from heavily contaminated feed within 72 h and from lightly contaminated feed within 24 h. Nonsterilized feed showed similar results. Commercial feed fed to broilers for 56 days and inoculated with Salmonella daily for Days 35 to 56 was treated with the chemical preservative at .5 and 1.0% for the last 7 days. Treatment resulted in a reduction of the number of fecal and intestinal samples positive for Salmonella, demonstrating elimination of Salmonella in the feed by use of the feed preservative.