Norovirus Infections Associated with Frozen Raw Oysters — Washington, 2011

On October 19, 2011, Public Health--Seattle & King County was contacted regarding a woman who had experienced acute gastroenteritis after dining at a local restaurant with friends. Staff members interviewed the diners and confirmed that three of the seven in the party had consumed a raw oyster dish. Within 18-36 hours after consumption, the three had onsets of aches, nausea, and nonbloody diarrhea lasting 24-48 hours. One ill diner also reported vomiting. The four diners who had not eaten the raw oysters did not become ill.