WASHINGTON (AP) — An outbreak of stomach illnesses in Iowa and Nebraska has been linked to salad mix served at local Olive Garden and Red Lobster restaurants and supplied by a Mexican farm. The company, which provides produce to the food service industry, said its facility located about 180 miles north of Mexico City in San Miguel de Allende is the only one of its 12 sites to be connected to the cases. In an email, the chairman and CEO of Taylor Farms, Bruce Taylor, said the Mexican plant produced 48 million servings of salads for thousands of restaurants in the Midwest and eastern U.S.