Abstract
Background: Dental caries is one of the most common chronic
infectious diseases in the world. The acids generated through
the fermentation of sugar by the microorganisms in dental
plaque can decalcify the superficial layers of tooth enamel
and can initiate dental caries. Streptococcus mutans have
been proposed as the main etiological agents of dental caries
.The aim of this study is to identify the main etiological
agents of dental caries and plaque which are supposed to be
Streptococcus mutans as correlating microorganism.
Materials and Methods: This cross sectional study was carried
out in the Pathology department of Border Guard Hospital,
Peelkhana, Dhaka during the period of 1st October, 2018 to
3IST December,2018. Study population was newly enrolled
soldiers and their families as male ,female and children in
BGB. A total of 50 clinical samples were included in this
study. The samples were collected from the Dental outdoor
patient department and all laboratory tests were performed at
Pathology department of aforementioned hospital. After
performing all possible microbiological tests for bacterial
isolation, results were recorded.
A Study on Dental Caries and Dental Plaques Caused by
Streptococcus Mutans, of Patients at Border Guard
Hospital Dhaka, Peelkhana
R JASMINEa, KI MRIDHAb, MK AKHTERc, D SHARMINd
a. Lt. Col. Rezina Jasmine, Lt. Col Rezina Jasmine, Classified Spl
in Pathology, Director, Pathology, BGHD Peelkhana, Dhaka
b. Lt. Col. Khairul Islam Mridha, BDS, D-OMFS, FCPS (OMFS)
c. Dr. Mohammad Kamal Akhter, BDS
d. Dr. Dilruba Sharmin, BDS
Address of Correspondence: Lt. Col Rezina Jasmine, Classified
Spl in Pathology, Director, Pathology, BGHD Peelkhana, Dhaka,
Mobile: 01769056748, Email: rezina.jasmine@gmail.com
Received: 17 November, 2019 Accepted: 10 March, 2020
Results: Among 50 samples, 46(92%) samples are considered
to be positive for Streptococcus viridans and 27(54%)
isolates are identified as Streptococci mutans according to
ability of producing special kind of exopolysaccharide, lactic
acid formation and high salt tolerance tests. Associated
organisms (32%) like candida were present in 15(30%)
samples and other bacterial colonies were present in 31(62%)
samples, along with Streptococcus viridans.
Conclusion: The finding of this study will help the dentists
to treat the patients with chronic caries, dental plaques as
they pose the gravest threat when they settle down on damaged
heart valves, cause subacute bacterial endocarditis and other
infections in various sites including mouth, joints, skin,
muscle, and central nervous system after tooth extraction or
any other invasive procedure.
Keywords: Biofilms; Dental caries; Glucosyltransferase;
Microbial ecology; Streptococcus
(J Bangladesh Coll Phys Surg 2020; 38: 121-125)
DOI: https://doi.org/10.3329/jbcps.v38i3.47059