(a) Reports of child abuse and neglect pursuant to this article shall be made immediately by telephone to the local state department child protective service agency and shall be followed by a written report within forty-eight hours if so requested by the receiving agency. The state department shall establish and maintain a twenty-four hour, seven-day-a-week telephone number to receive such calls reporting suspected or known child abuse or neglect.
(b) A copy of any report of serious physical abuse, sexual abuse or assault shall be forwarded by the department to the appropriate law-enforcement agency, the prosecuting attorney or the coroner or medical examiner's office. All reports under this article shall be confidential. Reports of known or suspected institutional child abuse or neglect shall be made and received as all other reports made pursuant to this article.