Beware of what you eat. Not long after a bagged salad mix began causing cyclospora in 350 people across 15 states, a Kansas company is removing more than 500,000 pounds of beef from the shelves due to possible E. Coli. contamination. The products by the National Beef Packing Co. have been shipped nationwide, prompting a voluntary recall, the U.S. Department of Agriculture said Wednesday. No illnesses have been reported since the products were shipped.

"We are working closely with authorities to investigate this matter and are contacting our customers who have purchased this product," the beef company said in a statement.

The products were produced on July 18 and bear the code EST. 208A inside the USDA mark of inspection, Reuters reported. This is the second time this year the company has recalled its beef due to possible E. Coli when it recalled 22,000 pounds of beef in June. E.Coli affects 76,000 people in the U.S. annually. E. Coli O157:H7 is a potentially deadly bacteria that can cause bloody diarrhea and kidney failure, the Huffington Post reported. The list of potentially contaminated products is as follows:

10 lb. chub of "National Beef" 93/ 7 Fine Ground Beef, Product Code 0707

10 lb. chub of "NatureSource" 80/20 Fine Ground Chuck, Product Code 7031

10 lb. chub of "NatureSource" 85/15 Fine Ground Beef, Product Code 7054

10 lb. chub of "NatureSource" 90/10 Fine Ground Beef, Product Code 7344

10 lb. chub of "NatureSource" 93/ 7 Fine Ground Beef, Product Code 7004

10 lb. chub of "NatureWell 80/20 Fine Ground Chuck, Product Code 7484

10 lb. chub of "NatureWell" 85/15 Fine Ground Beef, Product Code 7454

10 lb. chub of "NatureWell" 90/10 Fine Ground Sirloin, Product Code 7577

10 lb. chub of "NatureWell" 93/7 Fine Ground Beef, Product Code 7404

The Kansas-based company has not yet reported on the source of the contamination. The recalled meat has an expiration date of Aug. 7, according to the manufacturer.