ISOLATION AND IDENTIFICATION OF MUTAN’S STREPTOCOCCI BACTERIA FROM HUMAN DENTAL CARIES SAMPLES A THESIS BY Md. Jahangir Alam

Abstract

The present study was conducted to isolate, identify and characterize the bacterial pathogens their antibiotic resistance of Sterptococcus mutans of oral cavity of human the period from June to December, 2017 in Dinajpur Medical Institute, Dinajpur. In this study these were 150 samples collected from the student and brought to the microbiology laboratory of the department of microbiology, Hajee Mohammad Danesh Science and Technology University, Dinajpur for bacteriological examination, Isolation and identification of the microorganisms were confirmed by these morphology on different cultural media, staining characteristics and biochemical tests. A total of 100 samples were examined for the Isolation of human oral bacteria of which 80 (80%) samples were positive for Streptococcus mutans. The antibiogrm study revealed that most of the Streptococcus mutans was resistance to cefuroxime, cefixime, cefaclore, nitrofurantoin. How ever most of the Streptococcus mutans was sensitive to ofloxacin. This is to indicate that this antibiotic may have the first line of drug to be choice in clinical control of Streptococcus mutans. Most of the isolates have importance and confirmed the presence of eithis communal or pathogenic for oral cavity in Bangladesh