Gingivitis study (IMAGE) University of Washington School of Dentistry Caption A gingival bacterial sample is taken from a subject. Credit Dr. Shatha Bamashmous, University of Washington School of Dentistry Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.