Study of Bacterial Dominance and its Occurrence Frequency in Dental Plaque Sample

S. Subramonian; Chandran Segin; M. Murugan; T. Murugan

S. Subramonian Department of Dentistry, Dr.Somervell Memorial CSI Medical College and Hospital, Karakonam - 695504, Kerala, India
Chandran Segin Department of Dentistry, Dr.Somervell Memorial CSI Medical College and Hospital, Karakonam - 695504, Kerala, India
M. Murugan Department of Dentistry, Dr.Somervell Memorial CSI Medical College and Hospital, Karakonam - 695504, Kerala, India
T. Murugan Department of Dentistry, Dr.Somervell Memorial CSI Medical College and Hospital, Karakonam - 695504, Kerala, India

Keywords: Dental plaque, Bacterial dominance, Tooth decay and Streptococcus sp

Abstract

The intention of the present study was to investigate the bacterial dominance of dental plaque. For this study, 20 plaque samples were collected from adult humans of the around Marthandam area, Kanyakumari District, Tamil Nadu. The collected plaque samples were inoculated separately into the Basal salt medium and Basal salt medium agar plates. The morphologically different bacterial colonies were selected, identified by studying cultural, morphological and biochemical characteristics according to Bergey’s Manual of Systematic Bacteriology. As a result, 7 bacterial genera such as Bacillus sp, Lactobacillus sp, Staphylococcus sp-I, Staphylococcus sp-II, Micrococcus sp, Streptococcus sp, Proteus sp and Pseudomonas sp. were identified. Among these, Streptococcus sp has been found highest incidence (21.57 %) followed by Staphylococcus sp-I (17.65%).