New Jersey health officials say that 23 people contracted hepatitis A from a golf club in Morris County.

The Morris County Office of Health Management says that the patients contracted the illness from a food handler at the Mendham Golf and Tennis Club. It is believed that it happened between June 9 and June 30.

Of the 23 patients, one is seriously ill, according to officials.

Hepatitis A is mainly spread via close person-to-person contact or via contaminated food. Health officials say that the club notified its members about the potential risk on July 5.

Officials say that the food handler has been removed from work and that other food handlers were tested to see if they contracted the illness.

Health officials are also advising anyone who dined at the club when the food-handler was potentially infectious to seek out a post-exposure vaccine or medication to prevent illness after exposure.

Symptoms of hepatitis A may include fatigue, sudden nausea and vomiting, abdominal pain, loss of appetite, dark urine and intense itching.

Anyone who dined at the club from June 9 through June 30 who is experiencing these symptoms should contact their health care provider.