SAN DIEGO (AP) _ As many as 250 people who dined at a SeaWorld restaurant earlier this month may have been exposed to hepatitis A from an infected employee, county health officials say.

People who ate Caesar salad, watermelon, dinner salad or strawberries at Mama Stella's Italian restaurant on Oct. 11 or 21 may have been exposed, said Michele Ginsberg, an epidemiologist in the county's Health and Human Services Agency.

Tests confirmed Friday that a 40-year-old restaurant employee contracted the virus and is now on medical leave, SeaWorld officials said.

No other employee or visitor has been diagnosed with hepatitis A. Symptoms of the viral infection of the liver include abdominal discomfort, diarrhea, low-grade fever, loss of appetite, fatigue and dark urine.

SeaWorld planned to offer free shots of gamma globulin at a San Diego clinic to customers who believe they may have been exposed.