The number of confirmed cases linked to an E. coli outbreak in the Fresno area has increased by three to 11, according to an article in the Fresno Bee.

Samples are still being tested and additional positive results may be confirmed in the coming days, said Tim Casagrande, director of Fresno County’s environmental health services department.

Health officials are focusing on determining which food item served at three separate parties could have been the source.  Early reports indicated that beef tri-tips from the Meat Market was served at all three events.