A T Raj1, S Patil2, G S Sarode3, S C Sarode3, K H Awan4. 1. 1 Department of Oral Pathology and Microbiology, Sri Venkateswara Dental College and Hospital, Thalambur, Chennai, India. 2. 2 Department of Maxillofacial Surgery and Diagnostic Sciences, Division of Oral Pathology, College of Dentistry, Jazan University, Jazan, Saudi Arabia. 3. 3 Department of Oral Pathology and Microbiology, Dr. D. Y. Patil Dental College and Hospital, Dr. D.Y. Patil Vidyapeeth, Pune, Maharashtra, India. 4. 4 College of Dental Medicine, Roseman University of Health Sciences, South Jordan, UT, USA.