(CNN) -- A Delaware pediatrician pleaded not guilty Wednesday to 471 felony counts in the alleged child abuse of his patients, according to a spokeswoman for the state Department of Justice.
Dr. Earl Bradley, 56, was arrested in December on charges that include rape, sexual exploitation of a child, endangering child welfare and assault. Bradley, who had a practice in Lewes, Delaware, is accused of victimizing 103 children -- all girls except for one boy.
Delaware Attorney General Beau Biden has said the charges are based on "video and digital evidence" seized from Bradley's home and medical practice in December.
Bradley also has medical licenses in Pennsylvania, New Jersey and Florida. Authorities have said they have contacted officials in those states.
The next step in the proceedings is a case review May 17, according to Kerry Angell, a spokeswoman for the Delaware Department of Justice.