Zahoor Muhammad, Uddin Jalal, Evaluation of Bacterial Population in the Saliva of Drug Addicts, Journal of Dentistry And Oral Implants, Volume 2, Issue 1, 2018, Pages 06-14, ISSN 2473-1005, https://doi.org/10.14302/issn.2473-1005.jdoi-18-2115. (https://oap-researcharticles.org/jdoi/article/761) Abstract: Background: The human mouth harbors over 700 microbial genera. The large number of them is normal bacteria; few of them are opportunistic pathogens. Objective: The study was aimed to evaluate the bacterial population of drug addicted persons and compare it to that of a normal healthy person. Methods: Five different samples of human saliva; alcohol drunken person, oral moist snuff user, cigarette, hashish and shisha smoker were investigated the involvement of bacteria in them. One sample was collected from normal non-addict person. The bacterial population in drug addictive persons were compared that on normal non-addictive person. Results: The bacteria observed were: Gram negative cocci, mono cocci, streptococci, vibrio, gram negative rod, gram positive staphylococcus, gram positive streptococci and gram-positive rod. Conclusion: The order of bacterial population was; alcohol drunken person