This book presents the problem of tooth decay due to bacteria Streptococcus mutans one of methods of treatment using 3 extracts of S. persica (miswak) (aqueous, acetone and methanol) and prove its effectiveness and its impact on the gtf (B, C, and D) genes that code the glucosyltransferase (Gtf) enzymes that cause decay membrane compared to the usual means used for the prevention of tooth decay

Dr. Adhraa S. Flyyih was born in Baghdad of Iraq. She studied in Iraq at the University of Baghdad, College of science Department of Biology where she successfully completed two degrees: a BSc. in Science, a MSc. in Microbiology and continued for a Ph.D. degree in Genetic bacteriology which was achieved with honors in 2015.