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Antibacterial Activity of Flower Extract of Caesalpinia Pulcherrima, Delonix Regia and Peltaphorum Ferrugineum Against Urinary T

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Antibacterial Activity of Flower Extract of Caesalpinia Pulcherrima, Delonix Regia and Peltaphorum Ferrugineum Against Urinary T International Research Journal of Biological Sciences ___________________________________ ISSN 2278-3202 Vol. 3(4), 80-83, April (2014) Int. Res. J. Biological Sci. Antibacterial activity of flower extract of Caesalpinia pulcherrima , Delonix regia and Peltaphorum ferrugineum against Urinary tract Pathogens Sachidananda Swamy H.C, Asha M.M, Chaithra M, Vivek M.N, Yashoda Kambar, Prashith Kekuda T.R.* Post Graduate Department of Studies and Research in Microbiology, Sahyadri Science College (Autonomous), Kuvempu University, Shivamogga-577203, Karnataka, INDIA Available online at: www.isca.in, www.isca.me Received 20 th December 2013, revised 30 th January 2014, accepted 27 th February 2014 Abstract The present study was conducted with an aim of determining antibacterial efficacy of methanol extract of flowers of Caesalpinia pulcherrima, Delonix regia and Peltaphorum ferrugineum belonging to the family Fabaceae. Antibacterial efficacy of flower extracts was assessed by Agar well diffusion assay against five antibiotic resistant bacteria isolated from urinary tract infection. Among flower extracts, higher inhibitory activity was shown by C. pulcherrima followed by P. ferrugineum and D. regia. Susceptibility to extract was recorded higher in case of Gram positive bacteria when compared to Gram negative bacteria. Among bacteria, S. aureus and K. pneumoniae were inhibited to higher and least extent respectively. The flowers of the plants selected can be the potential sources for development of therapeutically important agents active against drug resistant urinary tract pathogens. Isolation of active components from flower extracts and their inhibitory activity against urinary tract pathogens are to be carried out. Key words: Caesalpinia pulcherrima , Delonix regia , Peltaphorum ferrugineum , urinary tract infection, agar well diffusion. Introduction of resistant bacterial strains. The prevalence of antibiotic resistance among these urinary tract pathogens is making The pharmacological treatment of disease began long ago with treatment of UTIs more complicated 8. Plants have been the use of plants. Plants, a key component of traditional considered as a potential alternate for treatment of UTIs. Plants medicine, are an important source of valuable medicines. Plants and plant based medicines have been used to treat urinary tract have been used to treat various types of ailments since time infections in various parts of the world 9-11 . It has been shown immemorial. Many countries of Africa, Asia and Latin America that extracts and components of many plants possess inhibitory rely on traditional medicine. It is estimated that >80% of activity against urinary tract pathogens 12-16 . The present study world’s population relies on traditional medicine to meet was conducted to determine inhibitory efficacy of methanol primary health care needs. Throughout the world, methods of extract of flowers of three plants viz ., Caesalpinia pulcherrima , folk healing commonly utilize herbs as part of tradition. The Delonix regia and Peltaphorum ferrugineum belonging to the practice of traditional medicine which is based on plants is family Fabaceae against antibiotic resistant urinary tract widespread in countries such as China, India, Japan, Pakistan, bacterial pathogens. Sri Lanka and Thailand. These plants are extensively used in various systems of traditional medicine such as Ayurveda, Material and Methods Unani, Homeopathy and Sidda. These plants also provide lead compounds for the development of pharmacologically active Chemicals and media: Solvents viz ., methanol and dimethyl drugs. Many conventional drugs, for e.g., aspirin, digoxin, sulfoxide (DMSO) and culture media viz ., Nutrient broth and quinine and morphine, have been derived from plants1-4. nutrient agar were obtained from HiMedia Laboratories, Mumbai. Urinary Tract Infections (UTIs) are those infections caused anywhere in the urinary tract by microorganisms. These UTIs Collection and identification of plant material: The flowers are among the most common infections in both community and of selected plants were collected at campus of Sahyadri Science hospital settings. UTIs are reported in people of all age groups College (Autonomous) during May 2013 and identified by Mr. in both sexes. A number of bacteria such as Escherichia coli , Gopal T.D, Assistant Professor, Department of Botany, Staphylococcus aureus , S. saprophyticus , Pseudomonas Sahyadri Science College (Autonomous), Shivamogga. The aeruginosa , Enterococcus faecalis , Klebsiella pneumoniae have flowers were dried under shade and powdered. been implicated in causing UTIs. Among these, E. coli is important and is isolated from >70% of cases of UTIs 5-7. Extraction of powdered leaf and flower material: In order to Antibiotics are commonly used to treat UTIs. However, overuse extract the powdered flower materials, about 25g of dried flower and abuse of these antibiotics often contributes to the emergence materials were extracted with methanol in a Soxhlet assembly. International Science Congress Association 80 International Research Journal of Biological Sciences ________________________________________________ ISSN 2278-3202 Vol. 3(4), 80-83, April (2014) Int. Res. J. Biological Sci. Later, the solvent extracts were filtered through Whatman No. 1 Overall, Gram positive bacteria were found to be more filter paper, concentrated in vacuum under reduced pressure and susceptible than Gram negative bacteria. Among extracts, dried in desiccator 8. higher inhibition of test bacteria was observed in case of C. pulcherrima followed by P. ferrugineum and D. regia . S. aureus Test bacteria: The inhibitory activity of flower extracts was and P. aeruginosa were inhibited to higher extent among Gram tested against two Gram positive bacteria viz ., Staphylococcus positive and Gram negative bacteria respectively. K. aureus and Enterococcus faecalis and three Gram negative pneumoniae was inhibited to least extent among test bacteria. bacteria viz ., Pseudomonas aeruginosa , Escherichia coli and DMSO was not found to cause inhibition of test bacteria (not Klebsiella pneumoniae previously isolated from subjects shown in table). suffering from UTIs. These bacteria were found to be multi- drug resistant (table 1). Table-2 Inhibitory efficacy of flower extracts against urinary tract Table-1 isolates Urinary tract isolates and antibiotics against which the Test Zone of inhibition in cm (Mean±SD) isolates are resistant bacteria C. pulcherrima P. ferrugineum D. regia Isolate Antibiotic E. coli 1.5±0.1 1.4±0.1 1.3±0.0 Ampicillin, Norfloxacin, Amoxicillin, P. 1.6±0.1 1.5±0.1 1.4±0.1 E. coli Cefuroxime, Cotrimazole, Cefazolin, aeruginosa Aztreonam, Cefpirome, Imipenem K. Ampicillin, Norfloxacin, Amoxicillin, 1.3±0.0 1.2±0.0 1.0±0.0 K. pneumoniae Cefuroxime, Cotrimazole, Cefazolin, pneumoniae S. aureus 1.8±0.2 1.6±0.1 1.5±0.0 Aztreonam, Cefoperazone, Imipenem E. faecalis 1.7±0.1 1.5±0.0 1.4±0.1 P. Gentamycin, Amikacin, Ceftazidime, aeruginosa Ciprofloxacin, Tobramycin Discussion: Urinary tract infection (UTI) represents Ampicillin, Gentamycin, Norfloxacin, S. aureus colonization of pathogens anywhere along the urinary tract. Penicillin UTIs have been classified based on the site of infection Ampicillin, Gentamycin, Norfloxacin, E. faecalis (pyelonephritis [kidney], cystitis [bladder], urethra [urethritis]) Penicillin and severity (complicated versus uncomplicated). UTIs are one among the most common bacterial infections affecting humans Preparation of bacterial inocula: The test bacteria were throughout their life span. These infections are the second most inoculated into test tubes containing sterile Nutrient broth common infection of any organ system and the most common o (HiMedia, Mumbai) and incubated at 37 C for 24 hours. The urological disease. UTIs are more common in females than in broth cultures were used for screening their susceptibility to males 7,17 . UTIs are acquired commonly in hospitals with an flower extracts. estimated prevalence of 1-10% and represent 30-40% of all nosocomial infections. The use of urinary catheter is the most Antibacterial activity of flower extracts: Agar well diffusion important risk factor which predisposes the host to nosocomial method was employed to determine antibacterial activity of UTIs. Instillation of catheter can lead to damage of mucosal flower extracts against clinical isolates of UTI. The broth layer, which disrupts the natural barrier and allows the cultures of test bacteria were aseptically swabbed on sterile colonization of bacteria. The indwelling urinary catheter is Nutrient agar (HiMedia, Mumbai) plates using sterile cotton associated with the majority of these infections in particular swabs. Later, wells of 6mm diameter were punched in the Catheter-associated bacteriuria 7,18,19 . The use of antibiotics is the swabbed plates using sterile cork borer and 100 µl of flower most widely employed strategy for treatment of UTIs. But, the extracts (20mg/ml of 25% dimethyl sulfoxide [DMSO; treatment of UTIs using antibiotics suffers from the major HiMedia, Mumbai]), and DMSO (25%, in sterile water) were drawback i.e ., antibiotic resistance in pathogens. Antibiotic filled in respectively labeled wells. The inoculated plates were resistance in urinary tract pathogens against commonly used o incubated at 37 C for 24 hours in upright position and the zone antibiotics has been well reported 20,21 . 8 of inhibition was recorded . Plants have shown to be effective against urinary tract Statistical analysis:
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