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Investigation of Antibacterial Activity of Different Extracts of Barleria Cristata Leaves

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Investigation of Antibacterial Activity of Different Extracts of Barleria Cristata Leaves International Journal of Health Sciences and Research www.ijhsr.org ISSN: 2249-9571 Original Research Article Investigation of Antibacterial Activity of Different Extracts of Barleria Cristata Leaves B. Sumaya Sulthana1, E. Honey1, B. Anasuya1, H. Gangarayudu2, M. Jyothi Reddy2, C. Girish1 1S.V.U.College of Pharmaceutical Sciences, Sri Venkateshwara University, Tirupati - 517502. A.P, India. 2Sri Lakshmi Venkateswara Institute of Pharmaceutical Sciences, Proddutur, Kadapa dt, A.P, India. Corresponding Author: C. Girish ABSTRACT The antibacterial activity of the methanol and aqueous extracts of the leaves of Barleria cristata was investigated against Gram positive organism Streptococcus pyogenes and Gram negative organism Escherichia coli NCTC 10418 using well diffusion technique. Results showed that the methanolic extracts of Barleria cristata were effective against the test microorganisms. The percentage of zone of inhibition on E. coli by methanolic extract and aqueous extract is 77.06 and 64.2 respectively and the percentage of zone of inhibition on Streptococcus by methanolic extract and aqueous extract is 78.5 and 68.8 respectively. The results of the study provide scientific basis for the use of the plant extract in the treatment of wounds and skin diseases. Key Words: Barleria cristata, Streptococcus pyogenes, Escherichia coli, Well diffusion technique and Antibacterial activity. INTRODUCTION over the world but only one third of the Ayurveda is traditional Hindu infectious diseases known have been treated system of medicine which is incorporated in from these synthetic products. [1] Herbal Atharva veda, the last of four vedas. It is medicines are defined as branch of science based on the idea of balance in body in which plant based formulations are used systems through use of proper diet, yogic to alleviate the diseases. [2] The other names breathing and herbal treatment. Ayurveda for herbal medicines are botanical considers three elemental substances as medicines or phyto medicines. Herbal doshas which are called as vata, pita and medicines are plant derivatives which are kapha. According to ayurveda balance of given in various types of formulations some these doshas results in health while of which may have antibacterial activity. [3] imbalance causes disease. In India, use of The antibacterial activity of plant medicinal plants has been in practice from extracts and phytochemicals can be ancient times. The system of medicine is evaluated by using antibiotic susceptible prevalent in many other countries like and microorganisms which are resistant. A Korea, China, Singapore and west Asia. The microorganism is a microscopic organism use of plants in treatment is not only which may be single celled or multicellular. confined to doctors but is also known to [4] These are diverse and they include households. Now at present the tendency to bacteria and most protozoa. This group may shift from synthetic to natural based also contain algae, fungi and some micro products and medicinal plants is growing all animals such as Rotifers. Microorganisms International Journal of Health Sciences & Research (www.ijhsr.org) 90 Vol.7; Issue: 9; September 2017 B. Sumaya Sulthana et al. Investigation of Antibacterial Activity of Different Extracts of Barleria Cristata Leaves belong to prokaryotic members with no KUMARI, lecturer in botany, Govt. Arts nucleus and organelles. Bacteria has two College, Proddatur, Kadapa (district), classes namely, Gram positive bacteria e.g. Andhra Pradesh, India. The leaves were Streptococcus, staphylococcus and Gram shade dried at room temperature and the negative bacteria Eg. E. coli and dried leaves of Barleria cristata were Pseudomonas. Antibiotics are also called as powdered to 40 mesh size. antibacterials. [5] These are one type of Extraction of leaves of Barleria cristata antimicrobials used in treatment and The powdered material of plant was prevention of bacterial infections. These passed through 40 mesh size. The dried antibiotics may be bactericidal or powder (50g) was extracted with methanol bacteriostatic in nature. The term antibiotic and distilled water using soxhlet apparatus can also be referred as substance used for about 72 hrs. After extraction with against microbes. solvent, the marc was dried in hot air oven Barleria cristata Linn grows as a below 400c and was concentrated by shrub. It belongs to family Acanthaceae distilling off the solvent and evaporating to which is a dicotyledonous flowering plant. dryness. The dried extract was subjected to It contains about 250 genera and 2500 preliminary phytochemical screening for species. In India 508 species are present. detection of various phytoconstituents. Southern China, India and Myanmar are the Microorganisms used native places where wide range of these Gram positive organism species is found. These are cultivated as Streptococcus pyogenes and Gram negative ornamental plants and also grown as ruderal organism Escherichia coli NCTC 10418 species along road sides and area from sea were used as test organisms to determine level to about 100meters. [6] Leaves are antibacterial activity of plant extracts. elliptical to ovate in shapes which are dark Media green on upper side and pale green on lower Nutrient agar media and blood agar side. Funnel shaped flowers in violet, pink media were prepared. Nutrient agar media and white colour. Fruits are ellipsoid consists of composition of beef extract, capsules which become glossy and smooth peptone, sodium chloride, agar and distilled at the stage of maturity. Seeds are attached water, which is used for cultivation of to hooked stalk that ejects them from the Escherichia coli and blood agar media capsule. [7] The calyx has four lobes and consists composition of peptone, yeast corolla with five lobes. Stamens are extract, agar, sodium chloride, sheep blood arranged in pairs on corolla. Ovary is and distilled water, which is used for superior which bicarpellate with axile cultivation of Streptococcus pyogenes. placentation is. This contains many Preparation of Nutrient agar media phytochemical constituents. The present Dissolve the dehydrated medium in study emphasized phytochemical the appropriate volume of distilled water constituents and antibacterial activity of i.e., 23 gm dehydrated nutrient agar in 1000 methanolic and aqueous extracts against two ml distilled water. [8] Heat with frequent species from the aerial parts of Barleria agitation and boil for 1 minute to cristata. completely dissolve the powder. Sterilize the medium by autoclaving (121°C for 15 MATERIALS AND METHODS min). Dispense the medium into plates. The Collection of leaves and authentication agar medium is left to solidify and store. The fresh leaves of Barleria cristata Determine the pH of the medium (pH 6.8 leaves were collected from village +/- 0.2) with a pH meter and adjust if Chennuru, Kadapa district, Andhra Pradesh, necessary. India, in the month of January 2017. The Preparation of Blood agar media plant was authenticated by K.ARUNA International Journal of Health Sciences & Research (www.ijhsr.org) 91 Vol.7; Issue: 9; September 2017 B. Sumaya Sulthana et al. Investigation of Antibacterial Activity of Different Extracts of Barleria Cristata Leaves Suspend 28 g of nutrient agar The antimicrobial activity was powder in 1 litre of distilled water. Heat this evaluated by agar well diffusion method, [10] mixture while stirring to fully dissolve all and it is modified by Olurinola. [11-12] The components. The dissolved mixture was inoculum suspension was swabbed subjected for sterilization at temperature of uniformly to solidified 20 mL Nutrient Agar 1210 C for 15 minutes by using autoclave. for bacteria, and then the inoculum was Once the nutrient agar has been autoclaved, allowed to dry for 5 min. Holes of 6 mm in allow it to cool but not solidify. [9] When the diameter were made in the agar using Glass agar has cooled to 45-50°C, Add 5% (v/v) Pasteur pipettes. [13] Aliquot of 10 μl from sterile defibrinated blood that has been each plant crude extract, stock solution warmed to room temperature and mix (1mg/ml) at different concentrations gently. Avoid Air bubbles. Dispense into 100µg/ml, 200µg/ml, 300µg/ml, 400µg/ml, sterile plates while liquid. and 500µg/ml were added into each seeded medium and allowed to stand for 1hr for proper diffusion and thereafter incubated at 37oC for 24 hrs. The resulting inhibition zones were measured in millimeters (mm). While doing the assay Prepare 5 dilutions (S1-S5) representing 5 test levels of sample and increasing the concentrations in the following manner such as 100µg/ml, 200µg/ml, 300µg/ml, 400µg/ml, 500µg/ml. % of zone of inhibition was calculated by using the following equation 1. Figure 1: Nutrient agar medium Equation 1 % of zone of inhibition Zone of inhibition by test (plant extract) = × 100 Zone of inhibition of standard drug RESULTS Zone of inhibition by different concentrations of plant extracts on both E.Coli and Streptococcus is as follows. a) Zone of inhibition by the concentration of 100µg Figure 2: Blood agar medium E.coli: Methanol - 12.5mm Aqueous- 10.6mm Sterilization of media Streptococcus: Methanol - 16.3mm Sterilization is a process of removal Aqueous - 14.1mm of microorganisms or pathogens by treating b) Zone of inhibition by the with chemicals or subjecting to high heat or concentration of 200µg radiation. The conical flasks containing E.coli: Methanol - 14.6mm nutrient agar medium and blood agar Aqueous - 12.3mm medium were plugged with non-absorbent Streptococcus:
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