Southern California restaurants are under orders to remove contaminated Adohr Milk Farms vanilla ice milk mixes from their shelves, state Health Director Kenneth Kizer said. The mixes, distributed primarily in Southern California, are being removed because they contain listeria monolcytogenes, a bacteria that can cause serious illness and stillbirths, he said. There have been no reported illnesses because of the product, Kizer said. The ice milk mixes, dated Dec. 2, were distributed only to restaurants by Adohr Milk Farms' Santa Ana and San Leandro facilities, Kizer said. The product is used to make soft-serve ice cream and milkshakes. The listeria organism produces listeriosis, a serious and sometimes fatal infection that can cause meningitis, encephalitis, blood infections and is particularly harmful to infants and the unborn.