No chicken, organic or conventionally raised, is completely free of pathogens. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP

Concerns about salmonella contamination led Cargill to recall 36 million pounds of ground turkey sold under many different brand names, including these packages at a Kroger grocery store in Redwood City, Calif. Paul Sakuma/AP hide caption

itoggle caption Paul Sakuma/AP

Reinhard Burger, president of the Robert Koch Institute, tells reporters in Berlin Friday that sprouts from a German farm are the cause of the country's massive foodborne illness outbreak. Michele Tantussi/AP hide caption

itoggle caption Michele Tantussi/AP

A closeup view of the bacterium behind the foodborne disease outbreak centered in Germany. Manfred Rohde/Getty Images hide caption

itoggle caption Manfred Rohde/Getty Images