Eastern Health says the latest closure affects the Golden Heights Manor in Bonavista.
Meanwhile visits have been restricted to immediate family members only at three hospitals in St. John's including the Health Sciences Centre, St. Clares Mercy Hospital and the Janeway Children's Health and Rehabilitation Centre.
Restrictions are also in place at the Dr. G.B. Cross Memorial Hospital in Clarenville, the Carbonear General Hospital and the Burin Peninsula Health Care Centre.
In all 17 of the health authority's facilities have either been closed or are under visitor restrictions.
Health officials are asking the public not to visit health care facilities if they are ill.