scholarly journals Dietary Benefits of Baphia nitida Stem Bark and Antimicrobial Effect on Some Pathogens

2020 ◽  
Vol 63 (3) ◽  
pp. 135-141
Author(s):  
Parker Joshua Elijah ◽  
Bennett Chima Nwangum ◽  
Victor Eshu Okpashi ◽  
Austin Ike Chukwunonyelum ◽  
Kenne Michel Tchimene ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Cereus ◽  
Antimicrobial Therapy ◽  
Crude Extract ◽  
Methylene Chloride ◽  
Antimicrobial Effect ◽  
Stem Bark ◽  
Methanol Fraction

The need to find a broad-based nutritional and antimicrobial therapy gave impetus to this investigation. The crude extracts of Baphia nitida stem bark were used to check for antimicrobial effect on selected micro-organisms for possible nutritional and therapeutic application. The stem bark components were extracted with four solvent systems using maceration. A synthetic drug gentamycin - 80 mg/mL (2 mL) was dissolved in 20 mL of distilled water to obtained 8 mg/mL, was used as a control. The crude extract exhibited an antibacterial effect on gram-positive organisms (Staphylococcus aureus and Bacillus cereus), and gram-negative organism (Pseudomonas aeruginosa, and Escherichia coli) at 2 mg/mL. These showed competitiveness with the 8 mg/mL of the control drug. The normal hexane fraction had an effect on Staphylococcus aureus but showed no effect on other bacteria. Minimum inhibitory concentration (MIC) showed a dose-dependent decrease in the effect for the crude extract. Ethyl acetate and methanol fraction had an effect on Staphylococcus aureus, Bacillus cereus, Pseudomonas aeruginosa, and Escherichia coli at varying concentrations - 20, 10, and 5 mg/mL. the initial screening of the Baphia nitida stem bark revealed alkaloids in the methanol-methylene chloride crude extract and methanol fraction only. Other solvents showed the alkaloids, flavonoids, saponins, terpenoids, glycosides, hydrogen cyanides and steroids respectively. Therefore, the presence of the phytochemicals implicates its antimicrobial effect and the basis for its efficacy as antimicrobial therapy.    

scholarly journals Synthesis of CoFe 2 O 4 /BiOI Nanocomposite: Effects on Staphylococcus aureus, Escherichia coli, Pseudomonas Aeruginosa and Bacillus Cereus

2021 ◽  
Author(s):  
Davood Gheidari ◽  
Morteza Mehrdad ◽  
Saloomeh Maleki ◽  
Samanesadat Hosseini
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Cereus ◽  
Antibacterial Properties ◽  
Limited Area ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inhibition Concentration ◽  
Resolution Mapping

Abstract With the increase of general knowledge and the advancement of science and technology, antibacterial substances were used more than antibiotics. In our current study, the antibacterial virtues of CFO/BiOI nanocomposite were investigated due to its high importance on Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa and Bacillus cereus. MIC, MBC , Disk Diffusion and IC50 tests Cefalotin (CF), Amoxicillin (AMX), Gentamicin (GM), Trimethoprim-sulphamethoxazole (SXT) and Ceftriaxone (CRO) antibiotics in concentration 30W, 10i, 10t , 25h and 30 were used to find the antibacterial properties of the synthesized nanocomposite, respectively. For the synthesis of nanocomposites polyethylene glycol (PEG) and sulfonic acid was used as a solvent. It is noteworthy that the synthesis was performed by heat dissolution method without the presence of surfactant. Also, various techniques such as X-Ray Diffraction(XRD), Scanning Electron Microscope (SEM), High resolution mapping and Energy Dispersive X-ray spectroscopy (EDAX) have been used to determine the properties of produced nanocomposites. SEM test results showed that the formed nanoparticles were globular and their size was limited area of 22 to 34 nm. The results showed CFO / BiOI nanocomposite exhibits strong significant biological activity against Bacillus cereus. The results of MBC (Minimum Bactericidal Concentration) and MIC (Minimum Inhibition Concentration) tests for CFO/BiOI nanocomposites on bacteria were examined in the range of 0.12-0.48 mg/ml and 0.06 to 0.24 mg/ml respectively. According to the results, the minimum IC50 value was determined at a concentration of 0.061 mg/ml. On the other hand, the most resisting and susceptible bacteria in this method were Pseudomonas aeruginosa and Bacillus cereus, respectively. These findings are identical to those of a prior study on CoFe2O4 nanoparticles antibacterial properties. MBC of the nanocomposites, 50 µl from all the tubes that showed no obvious bacterial growth were distributed on BHI agar plates and incubated for 24 h at 37 ◦C. The MBC endpoint is defined as the lowest concentration which killed 98% of the bacterial population.

scholarly journals Characterization and antimicrobial activity of vaginal lactobacillus isolate

2011 ◽  
Vol 63 (1) ◽  
pp. 29-35 ◽  
Author(s):  
Gordana Zavisic ◽  
Zeljka Radulovic ◽  
Valentina Vranic ◽  
Jelena Begovic ◽  
L. Topisirovic ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Survival Rate ◽  
Bile Salts ◽  
Antimicrobial Effect ◽  
Low Ph ◽  
Probiotic Potential ◽  
Pathogenic Escherichia Coli

The aim of this study was to investigate the probiotic potential of bacteriocin-producing lactobacilli strain Lactobacillus plantarum G2 isolated from the vaginal mucus of healthy women. The antimicrobial effect of G2 was confirmed in the mixed culture with pathogenic Escherichia coli, Staphylococcus aureus, Salmonella abony and Pseudomonas aeruginosa, while bacteriocine activity was detected against S. aureus and S. abony only. The strain showed an excellent survival rate in low pH and in the presence of bile salts. The percentage of adhered cells of L. plantarum G2 to hexadecane was 63.85?2.0 indicating the intermediate hydrophobicity.

scholarly journals PENGARUH PEMANASAN, TINGKAT KEASAMAN (pH) DAN KONSENTRASI GARAM TERHADAP STABILITAS ANTI BAKTERI EKSTRAK ETANOL KULIT KAYU AKWAY (Drimys piperita Hook f.)

2019 ◽  
Vol 12 (2) ◽  
Author(s):  
Gino Nemesio Cepeda ◽  
Meike Meilan Lisangan ◽  
Isak Silamba ◽  
Nitia Nilawati ◽  
Eka Syartika
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Cereus ◽  
Inhibitory Concentration ◽  
Heating Time ◽  
Diffusion Method ◽  
Ethanol Extracts ◽  
And Staphylococcus Aureus ◽  
Agar Well Diffusion Method

ABSTRACT  Akway (Drimys piperita) is a woody, evergreen and aromatic plant that belongs to family winteraceae. This plant is used by Sougb tribe lived in Sururey village, District of Anggi, to enhance the vitality of body. The objectives of the research were to determine antimicrobial stability of akway bark extracts influenced by heating time of 100OC, levels of acidity (pH) and salt contents.. Antimicrobial assays were done by using agar well diffusion method against four species of bacteria, i.e.  Escherichia coli ATCC25922, Bacillus cereus ATCC10876, Pseudomonas aeruginosa ATCC27853 and Staphylococcus aureus ATCC25923. The results showed that ethanolic extracts of akway bark only inhibited growth of B. cereus and S. aureus with minimum inhibitory concentration 0,99% and 0,89% . The levels of concentration and acidity of ethanol extracts  influenced the antimicrobial capacity of extracts.. Whereas heating time on 100OC during 25 minutes and salt contents  up to 5% of extract solution did not influence the antimicrobial stability of  akway bark extracts. Key words : akway, extracts, antimicrobe, pH, Heating, salt ABSTRAK Akway (Drimys piperita) adalah tumbuhan berkayu, aromatik dan hijau sepanjang tahun dan tergolong dalam suku winteraceae. Tumbuhan ini digunakan oleh Suku Sougb yang bermukim di desa Sururey Distrik Anggi, untuk mengobati malaria dan meningkatkan vitalitas tubuh. Tujuan dari penelitian ini adalah untuk menentukan stabilitas antimikroba ekstrak kulit kayu akway pada waktu pemanasan ekstrak pada 100OC, tingkat keasaman (pH) dan kandungan garam. Pengujian antimikroba dilakukan dengan menggunakan metode difusi agar terhadap empat spesies bakteri yaitu Escherichia coli ATCC25922, Bacillus cereus ATCC10876, Pseudomonas aeruginosa ATCC27853 and Staphylococcus aureus ATCC25923. Hasil menunjukkan bahwa ekstrak etanol kulit kayu akway hanya dapat menghambat bakteri Bacillus cereus dan Staphylococcus aureus dengan konsentrasi hambat minimum masing-masing adalah 0,99% dan 0,89%. Tingkat konsentrasi dan keasaman (pH) mempengaruhi kapasitas antimikroba ekstrak etanol kulit kayu akway. Sedangkan perlakuan pemanasan pada suhu 100OC dengan lama pemanasan sampai dengan 25 menit dan penambahan garam NaCl sampai konsentrasi 5%  tidak berpengaruh pada stabilitas antimikroba ekstrak etanol kulit kayu akway.  

scholarly journals Aktivitas Antibakteri dari Damar Batu (Shorea eximia) asal Indonesia

2012 ◽  
Vol 17 (1) ◽  
Author(s):  
Noryawati Mulyono ◽  
Bibiana Widiyati Laya ◽  
Siuling Susanti Rusli
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Bacillus Cereus ◽  
Proteus Mirabilis ◽  
Salmonella Typhi

Damar batu adalah resin natural, atau lebih tepatnya adalah hasil hutan bukan kayu dari tumbuhan Shorea eximia. Getah ini dihasilkan sebagai metabolit sekunder yang diinduksi oleh malnutrisi dan kekeringan. Penelitian ini bertujuan melakukan evaluasi aktivitas antibakteri dalam metabolit sekunder tersebut. Resin dilarutkan dalam heksana, etil asetat, dan etanol secara terpisah selama 24 jam dengan konsentrasi 0,5 g L -1 . Selanjutnya, aktivitas antibakteri diuji terhadap Escherichia coli, Salmonella typhi, Proteus mirabilis, Pseudomonas aeruginosa, Chromobacter violaceum, Streptococcus sp., Staphylococcus aureus, S. epidermidis, dan Bacillus cereus. Tiga komponen utama dalam damar batu yang mempunyai aktivitas antibakteri adalah δ-kadinen, valencene, dan spatulenol.

scholarly journals Identification and Modulatory Activity Assessment of 2-Hydroxy-3,4,6-trimethoxyacetophenone Isolated from Croton anisodontus Mull. Arg.(Euphorbiaceae)

2014 ◽  
Vol 9 (5) ◽  
pp. 1934578X1400900 ◽  
Author(s):  
Maria T. A. Oliveira ◽  
Alexandre M R. Teixeira ◽  
Henrique D. M. Coutinho ◽  
Irwin R. A. Menezes ◽  
Diniz M. Sena ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Stem Bark ◽  
Significant Activity ◽  
Subinhibitory Concentration ◽  
Alternative Source ◽  
Activity Assessment ◽  
First Time ◽  
Antibacterial Potential

The n-hexane extract of the stem bark of Croton anisodontus yielded 2-hydroxy-3,4,6-trimethoxyacetophenone, a well-known substance, but isolated from this species for the first time. The antimicrobial and modulatory activities of the compound towards Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Candida albicans, C krusei and C tropicalis strains were assessed. Antibiotics such as amikacin, gentamicin and neomycin were used in a subinhibitory concentration. Significant activity was observed towards P. aeruginosa and S. aureus 358, with p < 0.001 in association with amikacin. The present results place C anisodontus as an alternative source of 2-hydroxy-3,4,6-trimethoxyacetophenone with antibacterial potential.

Activité antimicrobienne de l’huile essentielle de galles du Pistachier de l’Atlas (Pistacia atlantica Desf.) en Algérie

2019 ◽  
Author(s):  
I. Sifi ◽  
M. Yousfi
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Candida Albicans ◽  
Bacillus Cereus ◽  
Salmonella Typhi ◽  
Huiles Essentielles ◽  
Activité Antimicrobienne ◽  
Pistacia Atlantica

L’activité antimicrobienne des huiles essentielles de galles de Pistacia atlantica récoltées dans trois régions (Aïn-Oussara, Laghouat et Kheneg) a été évaluée sur sept souches pathogènes (Escherichia coli, Bacillus cereus, Pseudomonas aeruginosa, Staphylococcus aureus, MRSA+, Salmonella typhi et Candida albicans), en utilisant les méthodes de diffusion sur gélose, de microdilution et celle de microatmosphère (seulement pour Candida albicans). Les huiles essentielles ont révélé un effet antimicrobien remarquable contre les micro-organismes testés, avec des valeurs de CMI et de CMB variant de 0,13 à 7,99 μl/ml et de 0,25 à 7,99 μl/ml, respectivement. Une activité importante a été observée pour les échantillons de la station Kheneg contre l’espèce Candida albicans avec une zone d’inhibition de 68 mm (50 μl). Ces résultats suggèrent que les huiles essentielles testées pour leur activité antimicrobienne peuvent être classées comme bactéricides.

scholarly journals IN VITRO EVALUATION OF ANTIMICROBIAL ACTIVITY OF MICRO PROPAGATED CALLUS OF CURUULIGO ORCHIODES (BLACK MUSILLI) AGAR WELL DIFFUSION AND MINIMUM INHIBITORY CONCENTRATION (MIC)

2017 ◽  
Vol 9 (3) ◽  
pp. 75
Author(s):  
Rajanikanth Garapati ◽  
N. Ramesh
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Candida Albicans ◽  
Bacillus Cereus ◽  
Proteus Vulgaris ◽  
Methanol Extracts ◽  
Tract Infections

Objective: In vitro investigated the potential of methanol extracts of micro-propagated C. orchiodes in the antimicrobial property against the three gram-negative bacteria, two gram-positive and one fungal filament.Methods: The micro propagated callus methanol extract was examined against Escherichia coli, Proteus vulgaris, Salmonella typhimurium, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus and Candida albicans. The zone of inhibitions are determined at 10 mg/ml concentration of methanol extracts of callus on agar well plate and MIC against tested microorganism.Results: The highest antibacterial activity recorded in Staphylococcus aureus Bacillus cereus and followed by Candida albicans. Antibacterial activity of leaf extracts of A. reticulata was also significant against the tested microorganisms Escherichia coli, Salmonella typhi, Proteus vulgaris, Pseudomonas aeruginosa compared to ciprofloxacin.Conclusion: Based on the above observations, these extracts were further evaluated for their effect on microorganisms causing infections like typhoid fever, urinary tract infections, septicemia, toxic shock syndrome, skin infection, nosocomial infection, arthritis and diarrhoea. The results also suggest that these plants serve a therapeutic purpose in the treatment bacterial infections.

scholarly journals Investigation of the Antimicrobial Activity of Rhaponticum (Rhaponticum Carthamoides D.C. Iljin) and Shrubby Cinquefoil (Potentilla Fruticosa L.)

Medicina ◽  
2011 ◽  
Vol 47 (3) ◽  
pp. 24 ◽  
Author(s):  
Vilma Jurkštienė ◽  
Alvydas Pavilonis ◽  
Daiva Garšvienė ◽  
Algirdas Juozulynas ◽  
Laimutė Samsonienė ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Bacillus Subtilis ◽  
Candida Albicans ◽  
Klebsiella Pneumoniae ◽  
Bacillus Cereus ◽  
Potentilla Fruticosa ◽  
Rhaponticum Carthamoides

The aim of the study was to determine antimicrobial activity of rhaponticum and shrubby cinquefoil extracts. Material and Methods. Ethanol extract from the leaves of rhaponticum (Rhaponticum carthamoides D.C. Iljin) and shrubby cinquefoil (Potentilla fruticosa L.) was produced at the Department of Food Technology, Kaunas University of Technology. The antimicrobial activity of the viscous extract or rhaponticum and shrubby cinquefoil was evaluated using standard microorganism cultures (bacteria Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212, Escherichia coli ATCC 25922, Klebsiella pneumoniae ATCC 33499, Pseudomonas aeruginosa ATCC 27853, Proteus mirabilis ATCC 12459, Bacillus subtilis ATCC 6633, Bacillus cereus ATCC 8035 and fungi Candida albicans ATCC 60193). The minimum inhibitory concentration (MIC) of the examined preparations was determined. Results. Both studied preparations – rhaponticum (Rhaponticum carthamoides D.C. Iljin) and shrubby cinquefoil (Potentilla fruticosa L.) – demonstrated similar antimicrobial activity. The highest sensitivity to the studied preparations was observed in microbes with eukaryotic cell structure: Candida albicans, which is a fungus, and a spore-forming prokaryotic bacterium, Bacillus cereus. The highest resistance was observed in Escherichia coli and Klebsiella pneumoniae. Conclusions. The studied preparations – viscous extracts of rhaponticum and shrubby cinquefoil – are substances with antimicrobial activity against gram-positive (Staphylococcus aureus and Enterococcus faecalis) and gram-negative (Escherichia coli, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Proteus mirabilis) bacteria, spore-forming bacteria (Bacillus subtilis and Bacillus cereus), and fungi (Candida albicans).

The Antimicrobial Activity of Extracts of the Lichen Cetraria aculeata and Its Protolichesterinic Acid Constituent

2003 ◽  
Vol 58 (11-12) ◽  
pp. 850-854 ◽  
Author(s):  
Ayşen Özdemir Türk ◽  
Meral Yılmaz ◽  
Merih Kıvanç ◽  
Hayrettin Türk
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Bacillus Subtilis ◽  
Listeria Monocytogenes ◽  
Bacillus Cereus ◽  
Aeromonas Hydrophila ◽  
Proteus Vulgaris ◽  
Ethanol Extracts

Abstract In this study, the antimicrobial activity of the acetone, diethyl ether and ethanol extracts of the lichen Cetraria aculeata has been investigated. The extracts were tested against twelve bacteria and eight fungi and found active against Escherichia coli, Staphylococcus aureus, Aeromonas hydrophila, Proteus vulgaris, Streptococcus faecalis, Bacillus cereus, Bacillus subtilis, Pseudomonas aeruginosa, Listeria monocytogenes. No antimicrobial activity against the fungi was detected. It was determined that only one substance in the extracts has antimicrobial activity and it was characterized as protolichesterinic acid. The MICs of the extracts and protolichesterinic acid were also determined.

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