As many as 200 patients of a Tulsa oral surgeon accused of unsanitary practices lined up outside a health clinic Saturday, looking to learn whether they had been exposed to hepatitis or HIV.

Letters began going out Friday to 7,000 patients who had seen W. Scott Harrington in the past six years, warning them that poor hygiene at his clinics in Oklahoma created a public health hazard. The letter said how and where to seek treatment but did not explain why Harrington was able to practice under such conditions for so long.

Inspectors found numerous problems at the doctor’s clinics in Tulsa and Owasso, according to the state Dentistry Board. The board filed a 17-count complaint against Harrington pending an April 19 license revocation hearing. The complaint said that used needles were reinserted into drug vials, an instrument set reserved for patients with infectious diseases was rusty and expired drugs were found in a medicine cabinet.

Attempts to reach Harrington have been unsuccessful. His malpractice lawyer, Jim Secrest II, did not respond to phone messages late last week.

— Associated Press