The new diagnosis brings the total number of cases at the facility to 25. A staff member also became ill, and there have been eight pediatric deaths.
The teams will assess infection prevention practices and deploy beginning in November, according to Health Commissioner Dr. Shereef Elnahal.
He added: "The department continues to work very closely with the facility to ensure that all infection control measures are being followed".
The outbreak will not be declared over until the centre can go four weeks without patients being newly infected.
Adenovirus is a family of viruses that typically impact young children and usually cause only mild illness, according to the Health Department.
Prince Harry and Meghan in New Zealand
The Duchess of Sussex received a big cheer when she opened a speech about women's suffrage in New Zealand in indigenous Maori. He said: "I said "Look who I met, it's your brother" and he said "Oh yeah".
The nine children who died in the outbreak that began September 26 range in age from toddler to young adult, with a lot of them under age 18. The affected children in the facility's pediatric ventilator unit had severely compromised immune systems, including respiratory problems, before the outbreak began, according to the agency.
The facility has since stopped admitting new residents as long as the outbreak is ongoing.
"Deeply saddened to report a 9th death from the Wanaque outbreak".
The U.S. Centers for Disease Control was assisting state health officials with testing and "expertise", according to the New Jersey Department. They also note this strain has been particularly associated with disease in communal living facilities.
Those cases are not related to the virus at the Wanaque center, the Health Department said.
In a review by the government's Centers for Medicare and Medicaid Services, Wanaque was awarded an above-average ranking in overall quality but was given a below-average health inspection rating. Symptoms may include common cold, sore throat, bronchitis, pneumonia, diarrhea, pink eye, fever, bladder inflammation or infection, inflammation of the stomach and intestines and neurological disease.