The highly contagious adenovirus poses little to risk to healthy people. The facility has been told it can't admit any new patients until the outbreak ends.
She also said the centre is working with the state Health Department and the Centers for Disease Control and Prevention in addition to offering professional grief counsellors and setting up a 24/7 hotline.
Health Department spokeswoman Donna Leusner said Thursday the person had already been ill so the diagnosis does not necessarily mean the virus is still spreading.
The infection can cause other illnesses, including pneumonia, diarrhea and bronchitis, the department said.
New Jersey health officials are sending infection-control teams to four long-term pediatric centers and a hospital to assist with training amid viral and bacterial outbreaks that killed a combined 10 people. The patients affected had "severely compromised immune systems", including respiratory problems, before the outbreak. A staff member also became ill but has recovered, the health department said.
This strain of adenovirus has been associated with communal living.
"Deeply saddened to report a 9th death from the Wanaque outbreak".
They will deploy to University Hospital in Newark; the Wanaque Center for Nursing and Rehabilitation in Haskell; the Voorhees Pediatric Facility, and the Children's Specialized Hospital, with locations in Toms River and Mountainside.
The Health Department says an inspection team found "minor handwashing deficiencies", and they continue to work closely with the nursing and rehab center on infection control issues.
Adenovirus is a respiratory virus that can causes mild or serious illness.
The viruses typically spread from close personal contact such as touching or shaking hands, through the air by coughing and sneezing, and touching objects or surfaces that have the viruses on them before touching one's mouth, nose, or eyes. These six types accounted for 85.5% of 1,497 laboratory-confirmed specimens reported during the time period. "But they're not almost as serious as influenza".