This article here states that Cargill is recalling 850,000 pounds of hamburger that may have E. coli contamination. The news of this bacteria possibly being in the market may disrupt hamburger and other meat sales in the short-run. One company, Topps Meat, has completely shut down due to the costs associated with taking back 22 million pounds of ground beef.
The market scare will reduce the demand (shifting it back) and the suppliers will suffer. Strangely enough, the price may actually increase since the supply of uncontaminated meat will be more scarce and hamburger is an inferior good. A main factor that may deter the possible price increase will be the availability of substitutes, but their price may increase because of the sudden increase in demand.