eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2018-06-25 15 2 311 315 10.13005/bbra/2634 29816 article Hamzah Abdulrahman Salman 1 Senthilkumar R. 1 Vasundhara M. 2 Department of Microbiology, J.J. College of Arts and Science, affiliated to Bharathidasan University, Pudukkottai, Tamil Nadu, India. Medicinal and Aromatic section, Department of Horticulture, UAS, GKVK, Bangalore, India. Capsicum annuum L. is an edible vegetable crop while Simarouba glauca L. is a medicinal plant. The study was taken up to evaluate the antibacterial activity of these extracted plant materials against Streptococcus mutans and Streptococcus sobrinus, the main dental caries agents. Three plant materials (fruit, seeds and leaves) of Capsicum annuum L. var. baydagi dabba and two plant materials (leaves and bark) of Simarouba glauca L. were collected in the month of November and February, respectively. The plant materials were cleaned, dried and prepared for extraction. The antibacterial susceptibility testing was performed using disc diffusion method. At maximum concentration of 100 mg/ml, it was observed that both the extracted plant materials did not possess antibacterial activity against S. mutans and S. sobrinus. The study revealed the lack of antibacterial activity of C. annuum and S. glauca against S. mutans and S. sobrinus. https://www.biotech-asia.org/vol15no2/lack-of-antibacterial-activity-of-capsicum-annuum-and-simarouba-glauca-against-streptococcus-mutans-and-streptococcus-sobrinus/ Anticariogenic; Chili; Baydagi Dabba; Medicinal Plant; Plant Extraction