Rep. George Miller, D-Calif., is worried about a recent outbreak thatand sickened about two dozen others in 11 states.
The E. coli outbreak was linked to ground beef produced by Fairbank Farms of Ashville, N.Y.
No schools were involved in the outbreak. But Miller said he's worried that tainted food might be purchased for school meal programs.
Miller asked the Government Accountability Office, the investigative arm of Congress, to see whether there are adequate protections for school meals at the local, state and federal level. He also asked investigators to compare the safety and quality of ground beef available to schools with the ground beef available to restaurants and other commercial buyers.
The GAO said in a September report that federal authorities had failed to tell schools about recalls of potentially tainted peanut products and canned vegetables, and cafeterias may have unknowingly served them to children.
GAO found the Agriculture Department didn't always make sure states and schools were notified promptly about recalled food distributed through the federal school lunch and breakfast programs, which serve 30 million students.
Democratic Sen. Kirsten Gillibrand of New York has introduced a bill to ensure that recalled food is quickly removed from school lunches, and she is planning on introducing another bill that would require more testing in ground beef plants.
"Food items that are being pulled from grocery store shelves across the country are still being served to millions of school children," Gillibrand said in a statement. "It's wrong, it's dangerous, and we need to take action."
E. coli is among several kinds of bacteria that can sicken or kill people. Outbreaks of food poisoning from E. coli often are linked to ground beef, but recent outbreaks also involved prepackaged cookie dough and fresh spinach.
Symptoms of infection from E. coli include severe stomach cramps, diarrhea that is often bloody, and vomiting. Most people get better in a week or so, but some infections can be life-threatening.
Very young children and the elderly are particularly vulnerable, but serious illness from E. coli can also strike healthy older children and young adults.