By Blake Morrison and Peter Eisler,USA TODAY

RACINE, Wis. — Students at Starbuck Middle School stumbled through the halls just after lunch on Oct. 31, 2007, holding their bellies and moaning. When the vomiting began, teachers knew that it wasn’t a Halloween prank.

By mid afternoon, almost 70 children waited outside the nurse’s office at the school near Milwaukee. “There were so many kids there, it was like, ‘Holy cow!’ ” recalls Michael Hannes, then a seventh-grader who felt “like someone kept punching me in the stomach.”

Days would pass before local health officials determined that the tortillas served at Starbuck and four other schools in Racine were to blame for 101 illnesses. An Internet search showed them the stunning particulars: The company that supplied the tortillas had a long history of making children sick.

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