Evaluation of Antibacterial Activity of Acer syriacum by Bioautography Method

1970 ◽  
Vol 9 (2) ◽  
pp. 3215-3219
Author(s):  
B. Al Asfour ◽  
R. Al-kayali ◽  
A. Kitaz
Keyword(s):  
Antibacterial Activity ◽  
Methanolic Extract ◽  
Ethyl Acetate Extract ◽  
Diffusion Method ◽  
Klebsiella Pneumonia ◽  
Bacterial Strains ◽  
In Vitro Antibacterial Activity ◽  
Inhibition Zones ◽  
Layer Chromatography

antibacterial activity of leaves, fruits and bark of acer syriacum was evaluated against both negative and positive gram bacterial strains. The powder of above parts were sequentially extracted with aqueous methanol 80%, acetone and petroleumether by maceration. The in vitro antibacterial activity of A. syriacum extracts (in concentration of 200 mg/mL) was performed by agar well diffusion method. Among the tested extracts, leaves methanolic extract has shown the highest growth inhibition. Further, the extract was fractionated, separated by thin layer chromatography (TLC) and submitted to bioautography. the results indicate that the ethyl acetate extract had  the most efficient antibacterial  compounds that displayed inhibition zones (25 mm) against Staphylococcus aureus ATCC25923 and (28mm) against Klebsiella pneumonia ATCC700603. the clear zones were located at RF= 0.15.

scholarly journals Chemical Composition and Antibacterial Activity of the Essential Oil of Retrohpyllum rospigliosii Fruits from Colombia

2010 ◽  
Vol 5 (7) ◽  
pp. 1934578X1000500
Author(s):  
Clara E. Quijano-Celis ◽  
Mauricio Gaviria ◽  
Consuelo Vanegas-López ◽  
Ina Ontiveros ◽  
Leonardo Echeverri ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Essential Oil ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Bacterial Strains ◽  
Positive Bacterium ◽  
Disc Diffusion Method ◽  
In Vitro Antibacterial Activity ◽  
Bacterium Bacillus

The essential oil from fruits of Retrophyllum rospigliosii (Pilger) C.N. Page grown in Colombia was analyzed by GC and GC/MS. Ninety-one compounds were identified, of which the most prominent were limonene (37.7%) and α-pinene (16.3%). The in vitro antibacterial activity of the essential oil was studied against seven bacterial strains using the disc diffusion method. The strongest activity of the oil was against the Gram-positive bacterium Bacillus cereus.

IN VITRO ANTIBACTERIAL ACTIVITY OF TINOSPORA CORDIFOLIA CREEPED ON AZADIRACHTA INDICA

2021 ◽  
pp. 12-13
Author(s):  
C. Bharathi ◽  
A. Harinatha Reddy ◽  
Prof. B. Venkatappa
Keyword(s):  
Antibacterial Activity ◽  
Azadirachta Indica ◽  
Tinospora Cordifolia ◽  
Diffusion Method ◽  
Klebsiella Pneumonia ◽  
Gram Negative ◽  
In Vitro Antibacterial Activity ◽  
Stem Extract ◽  
Agar Well Diffusion Method

Tinospora cordifolia is a well known medicinal and an immune enhancer plant.The article specially describes antimicrobial activity of T. cordifolia creeped on Azadirachta indica . It will encorporate the medicinal virtue when they survive on neem plants. The aqueous root and stem extract of T. cordifolia creeped on neem plant exhibited signicant antibacterial activity against Escherichia.coli, Enterobacter faecalis, Klebsiella Pneumonia (Gram negative), Staphylococcus aureus, Bacillus subtilis, Streptococci (Gram positive) by Agar well diffusion method.

scholarly journals In Vitro Antibacterial Activity of Black Soldier Fly (Hermetia Illucens) Larva Extracts Against Gram-Negative Bacteria

2019 ◽  
Vol 43 (2) ◽  
Author(s):  
Harlystiarini Harlystiarini ◽  
Rita Mutia ◽  
I Wayan Teguh Wibawan ◽  
Dewi Apri Astuti
Keyword(s):  
Antibacterial Activity ◽  
Inhibition Zone ◽  
Test Method ◽  
Diffusion Method ◽  
Bacterial Strains ◽  
Black Soldier Fly ◽  
E Coli ◽  
In Vitro Antibacterial Activity ◽  
Zone Growth

The aim of this study was to evaluate the in vitro antibacterial activity of Black soldier fly (BSF) larva extract. The BSF larva was extracted using methanol and then tested for antibacterial activity using agar diffusion method (zone growth inhibition). The antibacterial activity was conducted against Salmonella sp. and Escherichia coli, two important bacterial strains in poultry, using six dilution levels (10 mg/ml, 20 mg/ml, 40 mg/ml, 80 mg/ml, 160 mg/ml and 320 mg/ml). All the results were subjected analyze using t-test method. Based on the diameter of the inhibition zone, the BSF larva extract has a strong (P<0.05) antibacterial activity against Salmonella sp. and E. coli when the concentration used 320 mg/ml. In addition, BSF larva extract also contain high amount of lauric acid (49.18%), a saturated fatty acid that has been proven to proposes as antibacterial agent. Therefore, it could be concluded that the BSF larva extract could be used as a candidate for antibacterial substances. 

scholarly journals Evaluation of the in vitro antibacterial activity of some essential oils and their blends against Staphylococcus spp. isolated from episodes of sheep mastitis

2021 ◽  
Author(s):  
Filippo Fratini ◽  
Margherita Giusti ◽  
Simone Mancini ◽  
Francesca Pisseri ◽  
Basma Najar ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Essential Oils ◽  
Diffusion Method ◽  
Minimal Bactericidal Concentration ◽  
Coagulase Negative Staphylococci ◽  
Disk Diffusion Method ◽  
In Vitro Antibacterial Activity ◽  
High Concentrations ◽  
Thymus Serpyllum

AbstractStaphylococcus aureus and coagulase-negative staphylococci are among the major causes of mastitis in sheep. The main goal of this research was to determine the in vitro antibacterial activity of several essential oils (EOs, n 30), then five of them were chosen and tested alone and in blends against staphylococci isolates. Five bacteria were isolated from episodes of ovine mastitis (two S. aureus and three S. xylosus). Biochemical and molecular methods were employed to identify the isolates and disk diffusion method was performed to determine their antimicrobial-resistance profile. The relative percentage of the main constituents in the tested essential oils and their blends was detected by GC-EIMS analysis. Antibacterial and bactericidal effectiveness of essential oils and blends were evaluated through minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC). All of them showed sensitivity to the used antimicrobials. The EOs with the highest antibacterial activity were those belonging to the Lamiaceae family characterized by high concentrations of thymol, carvacrol and its precursor p-cymene, together with cinnamon EO, rich in cinnamaldehyde. In terms of both MIC and MBC values, the blend composed by Thymus capitatus EO 40%, Cinnamomum zeylanicum EO 20%, Thymus serpyllum EO 20% and Satureja montana EO 20% was found to be the most effective against all the isolates. Some essential oils appear to represent, at least in vitro, a valid tool against ovine mastitis pathogens. Some blends showed a remarkable effectiveness than the single oils, highlighting a synergistic effect in relation to the phytocomplex.

scholarly journals Giloy (Tinospora Cordifolia): In Vitro Evaluation of Antibacterial Properties

2021 ◽  
Vol 07 (06) ◽  
Author(s):  
Tulsa Devi ◽  
Keyword(s):  
Antibacterial Activity ◽  
Methanolic Extract ◽  
Water Extract ◽  
Hot Water ◽  
Tinospora Cordifolia ◽  
Diffusion Method ◽  
Zone Of Inhibition ◽  
Hot Water Extract ◽  
Agar Well Diffusion Method

Antibiotic resistance has become a global concern and hence, the search for other source of antimicrobials initiated to find a way to control infections in future. The main objective of this paper is to screen Giloy (Tinospora cordifolia) for its antibacterial activity. The stem of Tinospora cordifolia is used to prepare extract for determining it’s in vitro antibacterial activity as per the agar well diffusion method. In the agar well diffusion method 100μl of 24 hr broth culture of bacteria was aseptically and evenly swabbed on Mueller Hinton agar plates. Wells of about 8 mm diameter were aseptically cut using sterile cork-borer. 100 μl of plant extracts of different concentrations were then placed into the separate wells. The plates were incubated at 37 oC for 24hr. Antimicrobial activity of the giloy was determined by measuring the diameter of zone of inhibition. The methanolic extract of Tinospora cordifolia showed 13, 11, 9 and 5 mm zone of inhibition in S. aureus cultures by using 100, 75, 50 and 25 mg/ml concentration, respectively while hot water extract of Tinospora cordifolia showed 14, 12, 10 and 8 mm zone of inhibition for S. aureus by using 100, 75, 50 and 25 mg/ml concentration, respectively and the cold extract of Tinospora cordifolia showed 10, 8, 5 and 0 mm zone of inhibition for S. aureus by using 100, 75, 50 and 25mg/ml concentration, respectively. The methanolic extract of Tinospora cordifolia indicated 12, 10, 6 and 4 mm zone of inhibition in cultures of E.coli by using 100, 75, 50 and 25 mg/ml concentration, respectively and the hot water extract of Tinospora cordifolia showed 16, 14, 12 and 10 mm zone of inhibition in cultures of E.coli by using 100, 75, 50 and 25mg/ml concentration, respectively. The cold water extract of Tinospora cordifolia showed 13, 10, 8, and 5 mm zone of inhibition in cultures of E.coli by using 100, 75, 50 and 25 mg/ml concentration, respectively. It has been observed that Tinospora cordifolia showed very promising results as indicated by the zone of inhibition of bacterial culture through agar well diffusion method that varies from few mm to few cm. This study indicates the in-vitro antibacterial effect of Giloy which needs further validation through in-vivo studies.

scholarly journals In vitro Antibacterial Activity of Organic Extracts of Aloe barbadensis against Multi-drug resistant Pseudomonas aeruginosa Isolated from Wound Specimens

2018 ◽  
Vol 5 ◽  
pp. 69-76
Author(s):  
Mamata Adhikari ◽  
Anil Kumar Sah ◽  
Dev Raj Joshi
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Inhibitory Action ◽  
Therapeutic Option ◽  
Diffusion Method ◽  
Drug Resistant ◽  
Aloe Barbadensis ◽  
Organic Extracts ◽  
In Vitro Antibacterial Activity

Objectives: In order to investigate alternate therapeutic option, this study was carried out to assess the in vitro antibacterial activity of gel extract of Aloe barbadensis against multiple antibiotic resistant Pseudomonas aeruginosa isolated from wound specimens. Methods: A total of 180 different wound specimens collected in a hospital, were subjected to isolate and identify P. aeruginosa by cultural methods. Antibiotic susceptibility testing was done by Kirby- Bauer disc diffusion method to screen multidrug resistant isolates. A. barbadensis extracts were prepared using aqueous and organic solvents and their in vitro inhibitory action was evaluated by agar well diffusion methods. Results: Out of total, 38 (21.1%) of the wound specimens showed the occurrence of P. aeruginosa, among which 15 (39%) isolates were multi-drug resistant. Organic extracts of various concentrations (0.2 - 0.8 v/v %) inhibited 66.7% of MDR and all non-MDR (n = 23) P. aeruginosa with zone of inhibition ranging from 9.5 ±1.0 to 21.3 ± 2.2 mm but not by aqueous extract. A positive Pearson’s correlation (r=0.983) was found between antibacterial effect and concentrations of the extracts. The antibacterial activity of organic extracts was statistically associated with antibiotic resistance profile of the organism (p<0.05). Conclusion: Organic extracts of A. barbadensis revealed variable in vitro inhibitory action against both MDR and non-MDR P. aeruginosa isolated from wound specimens. Although further confirmation is needed, aloe gel extract may be applied as an alternate treatment option.

scholarly journals N-(Hydroxyalkyl) Derivatives of tris(1H-indol-3-yl)methylium Salts as Promising Antibacterial Agents: Synthesis and Biological Evaluation

2020 ◽  
Vol 13 (12) ◽  
pp. 469
Author(s):  
Sergey N. Lavrenov ◽  
Elena B. Isakova ◽  
Alexey A. Panov ◽  
Alexander Y. Simonov ◽  
Viktor V. Tatarskiy ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Antimicrobial Agents ◽  
Carbon Chain ◽  
Biological Evaluation ◽  
Carbon Chain Length ◽  
Klebsiella Pneumonia ◽  
Moderate Activity ◽  
Bacterial Strains ◽  
Reference Drug

The wide spread of pathogens resistance requires the development of new antimicrobial agents capable of overcoming drug resistance. The main objective of the study is to elucidate the effect of substitutions in tris(1H-indol-3-yl)methylium derivatives on their antibacterial activity and toxicity to human cells. A series of new compounds were synthesized and tested. Their antibacterial activity in vitro was performed on 12 bacterial strains, including drug resistant strains, that were clinical isolates or collection strains. The cytotoxic effect of the compounds was determined using an test with HPF-hTERT (human postnatal fibroblasts, immortalized with hTERT) cells. The activity of the obtained compounds depended on the carbon chain length. Derivatives with C5–C6 chains were more active. The minimum inhibitory concentration (MIC) of the most active compound on Gram-positive bacteria, including MRSA, was 0.5 μg/mL. Compounds with C5–C6 chains also revealed high activity against Staphylococcus epidermidis (1.0 and 0.5 μg/mL, respectively) and moderate activity against Gram-negative bacteria Escherichia coli (8 μg/mL) and Klebsiella pneumonia (2 and 8 μg/mL, respectively). However, they have no activity against Salmonella cholerasuis and Pseudomonas aeruginosa. The most active compounds revealed higher antibacterial activity on MRSA than the reference drug levofloxacin, and their ratio between antibacterial and cytotoxic activity exceeded 10 times. The data obtained provide a basis for further study of this promising group of substances.

scholarly journals Essential Oil from Leaves of Lantana canescens and L. lopez-palacii Grown in Colombia

2011 ◽  
Vol 6 (2) ◽  
pp. 1934578X1100600
Author(s):  
Andrés F. Peralta-Bohórquez ◽  
Clara Quijano-Célis ◽  
Mauricio Gaviria ◽  
Consuelo Vanegas-López ◽  
Jorge A. Pino
Keyword(s):  
Essential Oil ◽  
Volatile Compounds ◽  
Diffusion Method ◽  
Disc Diffusion ◽  
Enterobacter Sakazakii ◽  
Bacterial Strains ◽  
Disc Diffusion Method ◽  
Germacrene D ◽  
In Vitro Antibacterial Activity

The chemical composition of the volatile compounds from the leaves of Lantana canescens Kunth (Verbenaceae) and L. lopez-palacii Moldenke grown in Colombia were analyzed by GC and GC/MS. One hundred and thirty-nine volatile compounds were identified in L. canescens, of which the major ones were β-caryophyllene (13.5%), germacrene D (10.3%) and 1-octen-3-ol (8.4%). In the oil obtained from L. lopez-palacii, eighty-three compounds were identified, of which the most prominent were 1-octen-3-ol (24.4%) and β-caryophyllene (15.2%). The in vitro antibacterial activity of the L. lopez-palacii essential oil was studied against three bacterial strains using the disc diffusion method. No antimicrobial activity was found against Escherichia coli, Enterobacter sakazakii and Listeria monocytogenes.

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