Officials with the Napa County, CA, Public Health Division are investigating an unusual outbreak of Hepatitis A cases in the past two weeks, reportedly the first there in more than five years. The suspected source has not yet been announced.

Two of the five confirmed cases are employees at La Toque restaurant and the Bank Café and Bar at the Westin Verasa Napa Hotel in Napa, CA. The other three are not connected to the restaurants or other public places, health officials said.

People who ate or drank at either restaurant between Feb. 9 and Feb. 26 may have been exposed to the Hepatitis A virus and should monitor their condition for about 50 days, health officials said.

“We continue to assist Napa County Public Health and are taking all appropriate measures to ensure the safety of our guests and associates,” said Don Shindle, general manager of the hotel.

Those experiencing Hepatitis A symptoms are advised to contact a medical provider immediately. Symptoms include fever, fatigue, loss of appetite, nausea, vomiting, abdominal discomfort, dark urine, clay-colored bowel movements, joint pain, jaundice or yellowing of the eyes or skin.