Two major hospital chains in South Jersey have become one after the sale of Lourdes Health System was completed. Virtua assumed ownership of Lourdes, effective Monday, in a purchase that reshapes health care in New Jersey. Virtua takes ownership of all Lourdes facilities, including Our Lady of Lourdes Medical Center in Camden, Lourdes Medical Center of Burlington County, Lourdes Medical Associates and Lourdes Cardiology Services.