Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
Plant-derived medicines have been a part of our traditional health care system, and the antimicrobial properties of plant-derived compounds are well documented. The purpose of this study is to evaluate the effect of an aqueous extract of Terminalia chebula (a medicinal plant) on salivary samples and its potential for use as an anticaries agent in the form of mouthwash. A concentrated aqueous extract was prepared from the fruit of T. chebula . A mouth rinse of 10% concentration was prepared by diluting the extract in sterile distilled water.
Triphala, a mixture of Emblica officinalis, Terminalia chebula, and Terminalia bellirica, containing ingredients from plant origin, is often prone to microbial contamination. A high level of microbial contamination was observed in Triphala samples obtained from different sources. On gamma radiation processing, a sharp decline in log CFU was observed with increasing radiation dose and a complete decontamination at 5 kGy. Average D10 value for total aerobic and fungal counts were observed to be 0.55 +/- 0.073 kGy and 0.94 +/- 0.043 kGy, respectively.
PURPOSE: The aim of the present study was to assess the effectiveness of Terminalia chebula aqueous extract rinse on salivary pH and Streptococcus mutans. Mouthrinses have been in use from time immemorial as a supplement for routine oral hygiene practice. Although a large number of mouthrinses are currently available, many of them possess certain drawbacks, which has necessitated the search for alternate agents. MATERIALS AND METHODS: Ten per cent of T. chebula extract was prepared. A purposive sample of 30 subjects was selected and randomly divided into extract and control groups.
The fruit of Terminalia chebula Retz. (T. chebula), which is a member of the Combfreetaceae family, is used widely in Asian countries as a traditional folk medicine, and its extract has been reported to be an anticancer, antidiabetic and anticaries agent. In our previous study, chebulic acid isolated from T. chebula extract was confirmed to show antioxidant activity and protective action against endothelial cell dysfunction. In order to support the safety-in-use of the ethyl acetate (EtOAc)-soluble portion of a T.
Dermatophytes are the most common causative agents of cutaneous mycosis and remain a major public health problem in spite of the availability of an increasing number of antifungal drugs. It was, therefore considered necessary to pursue the screening of different extracts (compounds) of selected traditional medicinal plants reportedly having antidermatophyte potential. The aim of this study was to isolate and identify specific compound from the most active extract (free flavonoid) of stem of Terminalia chebula of the selected plants to treat dermatophytosis induced on experimental mice.
The nematode Caenorhabditis elegans has in recent years been proven to be a powerful in vivo model for testing antimicrobial compounds. We report here that the alkaloid compound Harmane (2-methyl-?-carboline) increases the lifespan of nematodes infected with a human pathogen, the Shiga toxin-producing Escherichia coli O157:H7 strain EDL933 and several other bacterial pathogens. This was shown to be unrelated to the weak antibiotic effect of Harmane. Using GFP-expressing E. coli EDL933, we showed that Harmane does not lower the colonization burden in the nematodes.
When growing on solid surfaces, yeast, like other microorganisms, develops organized multicellular populations (colonies and biofilms) that are composed of differentiated cells with specialized functions. Life within these populations is a prevalent form of microbial existence in natural settings that provides the cells with capabilities to effectively defend against environmental attacks as well as efficiently adapt and survive long periods of starvation and other stresses.
Studies in History and Philosophy of Biological and Biomedical Sciences
The study of cooperation and altruism, almost since its inception, has been carried out without reference to the most numerous, diverse and very possibly most cooperative domain of life on the planet: bacteria. This is starting to change, for good reason. Far from being clonal loners, bacteria are highly social creatures capable of astonishingly complex collective behaviour that is mediated, as it is in colonial insects, by chemical communication.
Endophytic actinobacteria colonize internal tissues of their host plants and are considered as a rich and reliable source of diverse species and functional microorganisms. In this study, endophytic actinobacterial strain YIM 63111 was isolated from surface-sterilized tissue of the medicinal plant Artemisia annua. We identified strain YIM 63111 as a member of the genus Pseudonocardia. A. annua seedlings grown under both sterile and greenhouse conditions were inoculated with strain YIM 63111. The growth of A.
PURPOSE: Triphala is an ayurvedic preparation with known antimicrobial action. This study was carried out to assess the antibacterial efficacy of triphala against salivary mutans streptococci in comparison with the 'gold standard' chlorhexidine. MATERIALS AND METHODS: A double blind randomised control trial was conducted among 57 volunteers who were assessed to be in the high caries risk category. They were randomly allocated into three study groups: 1) 15 ml of 6% triphala mouthwash; 2) 15 ml of 0.2% chlorhexidine (active control); 3) no mouthwash (passive control).