Minnesota State officials say consumers should avoid consuming smoked pork and beef bratwurst made by J&B Meats, of Barnesville, because it may be contaminated with Listeria bacteria.  The Minnesota Department of Agriculture says there are no reports of illnesses from the product. The contamination was found through routine testing.  J&B Meats sold the bratwurst at its retail store in Barnesville, about 20 miles southeast of Moorhead. The sausages are often sold frozen.  The affected bratwurst bears the lot number PBB30306, and Minnesota State Establishment Number 1198. Consumers who have any are asked to return it to the store.