The US Department of Agriculture (USDA) has been urged to test raw beef carcasses and trimmings for the presence of food poisoning bacteria Escherichia coli O157:H7, as it already does for raw ground beef, by consumer groups who filed a petition with USDA yesterday [Tuesday]. The groups, the Center for Science in the Public Interest (CSPI), the American Public Health Association, Consumer Federation of America, the National Consumers League, and Safe Tables Our Priority (STOP), want testing earlier in the production process, so beef contaminated with the pathogen does not get ground in with uncontaminated beef.