A Kansas company is recalling 50,000 pounds of ground beef for fear of E. coli contamination, and this is the second time this company has released a recall this year.

The possibly infected products were shipped across the nation, but there have been no reports of illness so far, CNN reported.

National Beef Packing Co. issued "a voluntary recall for NatureSource Natural Beef, Naturewell Natural Beef and National Beef commodity ground beef." The questionable meat has a use by date of August 7.

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

The USDA, according to its label, inspected the product.

 A Food Safety and Inspection Service routine inspection called a possible contamination to the company' s attention.

Earlier this summer National Beef Packing Co. voluntarily recalled 22,000 pounds of meat over another possible E. coli contamination.

The symptoms of E. coli are diarrhea, abdominal pain or cramping, nausea, and vomiting, MayoClinic reported.

Common carries of the bacteria are: unpasteurized milk, fresh produce, restaurant meals, and ground beef.

A recent outbreak of the parasite Cyclospora was traced back to packaged salad from an undisclosed brand and distributer, Reuters reported.

There have been 378 cases in the United States since June, but only 21 have been hospitalized.

 The greens have only been confirmed as the source of infection in Iowa and Nebraska.

The symptoms of the parasitic infection include watery diarrhea, nausea, cramps, and fatigue.

Officials have said it is unlikely the contaminated salad greens are still on supermarket shelves.

In order to prevent food contaminations frequent hand washing is extremely important.

Adequate washing of fresh produce can also help prevent illness.

"We're not just talking about running them under some water and giving them a little pat," Barbara Chadwick, clinical services manager for the Linn County Health Department, said, USA Today reported. "It's about soaking them and giving them a good scrubbing."