The Dentistry Board complaint says Harrington and his staff told investigators that a "high population of known infectious diseasecarrier patients" received dental care from him.
These carrier screenings involve identifying individuals who carry one copy of a gene for a disease that requires two copies for the disease to be expressed in a child.
More significantly, they remain unsure exactly how the disease is transmitted, how it infects the human body, and at what point a carrierof the bacterium may infect others.