scholarly journals Screening of some plant materials used in South-West Algerian traditional medicine for their antibacterial activity

2017 ◽  
Vol 9 (4) ◽  
pp. 619
Author(s):  
Fatehi Naima ◽  
Houcine BENMEHDI ◽  
Allali Hocine ◽  
Oulednecir Nawal
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Traditional Medicine ◽  
Diffusion Method ◽  
Plant Materials ◽  
Gram Negative ◽  
Maximum Inhibition ◽  
Reference Strains

<p>The initial introduction of new medicinal agents into the health care system sometimes, requires information beyond that is recorded in libraries relying instead, on reports available through traditions and healers within a society. This paper explored the antibacterial activity of aqueous and hydromethanolic extracts of nine folkloric medicinal plant from Bechar region (southwest Algeria) namely: <em>A. nardus, A. schoenanthus, G. vulgaris, </em>two species of<em> H. scoparia green &amp; red, P. laevigata, R. tripartita, T. gallica</em> and <em>T. nudatum</em>, frequently used in the local traditional medicine. The antibacterial activity of different extracts were evaluated by using disc diffusion method agar and antibiotics susceptibility of ten selected microorganisms: seven reference strains, <em>Bacillus cereus, Enterococcus faecalis, Staphylococcus aureus</em>,<em> Escherichia coli</em>,<em> Klebsiella pneumoniae, Pseudomonas aeruginosa</em>, <em>Salmonella typhi</em>, and three clinically isolated strains, <em>Escherichia coli</em> (Urinary Tract Infection), <em>Escherichia coli</em> (Vaginal Infection) and <em>Staphylococcus aureus </em>(Skin Infection).</p><p>The maximum antibacterial activity was recorded against the gram negative reference strains <em>Pseudomonas aeruginosa</em>and<em> Escherichia coli</em> with a maximum inhibition diameter of 15.6 ± 0.5 and 15.0 ± 1.4 mm respectively displayed by the aqueous extract of <em>T. gallica, </em>followed by the activity detected by the hydromethanolic extract of <em>R. tripartita</em> against the gram negative reference strain <em>Pseudomonas aeruginosa </em>(14.6±1.2 mm) and the aqueous and hydromethanolic extracts of <em>R. tripartita</em> against the gram negative reference strains <em>Pseudomonas aeruginosa</em> and<em> Escherichia coli</em> with a maximum inhibition diameter of 14.3 ± 2.0 and 14.3±0.5 mm, respectively.</p><p>According to the present study, <em>H. scoparia red, P. laevigata, R. tripartita, and T. gallica</em>can be served as broad spectrum antibiotic and used as a potent source of natural antibacterial agents by replacing commercially available synthetic drug that may have a large number of side effects.</p>

scholarly journals UJI DAYA ANTIBAKTERI BAWANG PUTIH (Allium sativum L.) TERHADAP BAKTERI Staphylococcus aureus, Escherichia coli, Salmonella typhimurium DAN Pseudomonas aeruginosa DALAM MENINGKATKAN KEAMANAN PANGAN

2015 ◽  
Vol 24 (1) ◽  
pp. 53 ◽  
Author(s):  
Sri Suryatmiati Prihandani
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Food Safety ◽  
Salmonella Typhimurium ◽  
Diffusion Method ◽  
Gram Positive ◽  
Gram Negative ◽  
Garlic Powder

Garlic is widely used as a herbal medicine. In order to support the empirical use and improve its application in food safety, this study was conducted to test the antibacterial activity of garlic against Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli, Salmonella typhimurium and Pseudomonas aeruginosa) bacteria. Garlic was used in the form of fine powder. Garlic powder then dissolved in sterile distilled water and squeezed to obtain garlic solution with a concentration of 50%, 25% and 12.5%. Antibacterial activity of garlic juice was tested by diffusion method using paper disc to determine diameter of bacterial growth inhibition zones. Screening results demonstrated that the chemical constituents of garlic powder were saponins, flavonoids and triterpenoids. Garlic powder has antibacterial activity to Gram-positive S. aureus and Gram-negative bacteria E. coli, S. typhimurium and P. aeruginosa. Garlic has antimicrobial potential and can be used as decontaminant against Escherichia coli to maintain quality of food safety such as meat.

scholarly journals Potential Antibacterial Activity of Two Important Local Chewing Sticks “Fagara zanthoxyloides and Distemonanthus benthamianus” along with Antioxidant Capacities

2019 ◽  
Vol 18 (2) ◽  
pp. 223-232
Author(s):  
AO Shittu ◽  
A Aliyu ◽  
MS David ◽  
NS Njinga ◽  
HI Ishaq
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antimicrobial Activity ◽  
Antibacterial Activity ◽  
Antioxidant Activities ◽  
Diffusion Method ◽  
Phytochemical Screening ◽  
Zones Of Inhibition ◽  
Chewing Sticks

In order to authenticate and ascertain the various claim by the rural dwellers that depend on chewing sticks for their oral hygiene and protection against innumerable diseases, the antibacterial activity of the roots of Fagara zanthoxyloides and Distemonanthus benthamianus were evaluated. Preliminary phytochemical screening was carried out using standard methods. In-vitro antibacterial activity of the methanol extracts of both plants was also carried out using the agar well diffusion method against standard strains of Staphylococcus aureus ATCC 25923, Pseudomonas aeruginosa ATCC 27853, Escherichia coli ATCC 25922, Salmonella typhii ATCC 14028, Citrobacter freundii ATCC 8090 and also some clinical isolates of Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae and Proteus mirabilis at different concentrations and ratios. Preliminary phytochemical screening showed that the extracts contained alkaloids, saponin, tannins, steroids, flavonoids, anthraquinones, cardiac glycosides and phenol. All the test microorganisms were susceptible to the inhibitory effect of the extracts at concentrations of 200 mg/ml and 500 mg/ml. F. zanthoxyloides had better antimicrobial activity with zones of inhibition ranging from 21.0 to 26.0 mm at 200 mg/ml and 24.3 to 29.3 mm at 500 mg/ml while D. benthamianus had zones of inhibition ranging from 17.7 to 26.7 mm at 200 mg/mL and 19.0 to 26.7 mm at 500 mg/mL. Some of the test microorganisms were resistant to the standard antibiotics (cefuroxime, ciprofloxacin, ofloxacin and gentamicin). Combinations of the extracts in ratios 50:50 and 75:25 yielded no increase in activity. The MIC and MBC for D. benthamianus ranged from 6.25 mg/ml to 100 mg/mL and 25 to 200 mg/ml, respectively while that of F. zanthoxyloides ranged from 1.56 mg/ml to 12.5 mg/mL and 50 to 200 mg/ml, respectively. The antimicrobial activity demonstrated by F. zanthoxyloides and D. benthamianus indicates that they would be valuable in the management of urinary, respiratory and gastrointestinal tracts infections while at the same time helping to mitigate the problem of antimicrobial resistance. Phenolic compounds of plants, among them flavonoids are the chief constituents, which have potent antioxidant activities Dhaka Univ. J. Pharm. Sci. 18(2): 223-232, 2019 (December)

scholarly journals Catheter-Associated Urinary Tract Infection and Obstinate Biofilm Producers

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Govinda Maharjan ◽  
Priyatam Khadka ◽  
Gomik Siddhi Shilpakar ◽  
Ganesh Chapagain ◽  
Guna Raj Dhungana
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibiotic Sensitivity ◽  
Diffusion Method ◽  
Klebsiella Pneumonia ◽  
Gram Positive ◽  
Gram Negative ◽  
Control And Prevention ◽  
Amoxicillin Clavulanate

Background. Biofilms, or colonies of uropathogen growing on the surface of indwelling medical devices, can inflict obstinate or recurring infection, thought-provoking antimicrobial therapy.Methods. This prospective analysis included 105 urine samples from catheterized patients receiving intensive care. Ensuing phenotypic identification, antibiotic sensitivity test was performed by modified Kirby–Bauer disc diffusion method following CLSI guidelines; MDR isolates were identified according to the combined guidelines of the European Centre for Disease Prevention and Control (ECDC) and the Centers for Disease Control and Prevention (CDC). Biofilm-forming uropathogens were detected by the tissue culture plate (TCA) method.Results. The predominant uropathogen in catheter-associated UTIs (CAUTIs) wasEscherichia coli57%, followed byKlebsiella pneumonia15%,Pseudomonas aeruginosa12%,Staphylococcus aureus8%,Enterobacterspp. 3%,Enterococcus faecalis,Acinetobacterspp., andProteus mirabilis1.5%, of which 46% isolates were biofilm producers. Prime biofilm producers wereEscherichia coli33%, followed byKlebsiella pneumoniae30%,Pseudomonas aeruginosa20%,Staphylococcus aureus10%,Acinetobacter, andEnterobacter3.33%. Multidrug resistance associated with biofilm producers were greater than biofilm nonproducers. The Gram-negative biofilm producers found 96.15%, 80.76%, 73.07%, 53.84%, 53.84%, 46.15%, 19.23%, and 11.5% resistant to amoxyclave, ceftazidime, tetracycline, gentamicin, meropenem, nitrofurantoin, amikacin, imipenem, and fosfomycin, respectively. Gram-positive biofilm producers, however, were found 100% resistant to tetracycline, cloxacillin, and amoxyclave: 66.67% resistant to ampicillin while 33.33% resistant to gentamicin, ciprofloxacin, and nitrofurantoin.Conclusion. High antimicrobial resistance was observed in biofilm producers than non-biofilm producers. Of recommended antimicrobial therapies for CAUTIs, ampicillin and amoxicillin-clavulanate were the least active antibiotics, whereas piperacillin/tazobactam and imipenem were found as the most effectual for gram-negative biofilm producer. Likewise, amoxicillin-clavulanate and tetracycline were the least active antibiotics, whereas vancomycin, fosfomycin, piperacillin-tazobactam, and meropenem were found as the most effective antibiotic for Gram-positive biofilm producer. In the limelight, the activity fosfomycin was commendable against both Gram-positive and Gram-negative biofilm producers.

scholarly journals Sintesis dan Uji Aktivitas Antibakteri Senyawa N-fenil-4-klorobenzamida

2018 ◽  
Vol 6 (2) ◽  
pp. 212
Author(s):  
Elok Dea Orens Ubung Wisnu ◽  
Indah Purnama Sary ◽  
Dwi Koko Pratoko
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Antibacterial Agent ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Crystal Shape ◽  
Gram Negative ◽  
Gram Positive Bacteria ◽  
Benzamide Derivatives

N-phenylbenzamide is benzamide derivatives, which is potential as an antibacterial agent. N-phenyl-4-chlorobenzamide is N-phenylbenzamide derivative that substitued by chloro to the para position and it was expected to enhance the antibacterial activity. N-phenyl-4-chlorobenzamide was synthesized by reacting 1,3-diphenyilthiourea and 4-chlorobenzoil chloride. This compound has been purified and provided 53% of product with crystal shape, white color, and melting point of 195-197 oC. The purification of this compound was confirmed by TLC and the structure was identified by 1H-NMR, 13C-NMR, and FTIR spectroscopy. This compound was tested for its activity against gram positive bacteria Staphylococcus aureus and gram negative bacteria Pseudomonas aeruginosa, evaluated by well diffusion method and the result showed no activity against both Staphylococcus aureus and Pseudomonas aeruginosa.   Keywords: N-phenyl-4-chlorobenzamide, synthesis, antibacterial activity

scholarly journals Influence of Camel Milk on the Antibacterial Activity of Ciprofloxacin

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Abdulhamid Imam Tanko ◽  
Abdulgafar Olayiwola Jimoh ◽  
Muhammad Tukur Umar ◽  
Shuaibu Abdullahi Hudu
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Serratia Marcescens ◽  
Antagonistic Effect ◽  
Camel Milk ◽  
Diffusion Method ◽  
Traditional Medicines

Background: Despite the availability of more researched and formulated orthodox medicines, traditional medicines remain the main source of therapy for the majority of people worldwide with some patrons concurrently using both forms unaware of the unwanted effects that may occur. Camel milk is often used alone or in combination with other orthodox medications to treat diseases. The study aimed to investigate the influence of camel milk on the antibacterial activity of ciprofloxacin. Materials and methods: The in vitro antibacterial activity of camel milk escalating doses (30μL, 100μL and 300μL) alone and in combination with Ciprofloxacin escalating doses (2mcg, 5mcg, 15mcg) against some clinical bacterial isolates (Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, Serratia marcescens) was determined using the Agar-well diffusion method. Result: Camel milk escalating doses alone showed dose-dependent antibacterial effect against all the test bacteria. However, combinations of the camel milk escalating doses and ciprofloxacin escalating doses respectively produced an antagonistic effect against all the test organisms. Conclusion: Fresh camel milk possesses antibacterial activity against Pseudomonas aeruginosa, Escherichia coli, Serratia marcescens and Staphylococcus aureus but is not recommended for combination with ciprofloxacin to treat infections caused by the above organisms.

scholarly journals Evaluation of Antibacterial Activity of Three Quaternary Ammonium Disinfectants on Different Germs Isolated from the Hospital Environment

2020 ◽  
Vol 2020 ◽  
pp. 1-6
Author(s):  
Amal Ramzi ◽  
Bouchra Oumokhtar ◽  
Yassine Ez zoubi ◽  
Touria Filali Mouatassem ◽  
Moussa Benboubker ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Quaternary Ammonium ◽  
Inhibitory Concentration ◽  
Hospital Environment ◽  
Gram Positive ◽  
Gram Negative ◽  
E Coli

Background. The microbiological risk of the hospital environment, including inert surfaces, medical devices, and equipment, represents a real problem. Objective. This study is aimed at demonstrating and assessing the antibacterial activity of three synthetic disinfectants classified as quaternary ammoniums on different bacterial strains (Gram-negative and Gram-positive like Escherichia coli, Klebsiella pneumoniae, Enterobacter cloacae, Pseudomonas aeruginosa, Acinetobacter baumannii, and Staphylococcus aureus) isolated from the hospital environment. The reference strains included Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 29213, and Pseudomonas aeruginosa ATCC 27853 used as negative control strains. Method. Three quaternary ammonium disinfectants were tested: DDN9® (0.5%) which contains didecylmethylpolyoxyethylammonium propionate as an active substance, spray (0.4%) containing quaternary ammonium compounds, and Phagosurf ND® (0.4%) with didecyldimethylammonium chloride. Their effect was evaluated using the disk diffusion technique and the broth dilution methods, allowing the Minimum Inhibitory Concentration (MIC) and then the Minimum Bactericidal Concentration (MBC). Result. Only the growth of Gram-positive bacteria and some strains of Gram-negative bacteria were inhibited by the three synthetic disinfectants. NDD9® demonstrated an antibacterial effect only against the Gram-positive strains (S. aureus and S. aureus ATCC 29213) with a MIC of 0.25 mg/ml. The disinfectant spray showed effect against all four strains including E. coli (9), S. aureus, E. coli ATCC 25922, and P. aeruginosa ATCC 27853 with an inhibitory concentration of 4 mg/ml, while the growth of S. aureus ATCC 29213 was inhibited at 2 mg/ml. The third disinfectant, Phagosurf ND®, inhibited only the growth of S. aureus ATCC 29213 at a MIC of 4 mg/ml. Conclusion. This study is the first here in Morocco to evaluate the bacterial activity of products intended for the control of the healthcare environment. The results obtained on the three disinfectants tested reveal an ineffectiveness against some isolated strains from the hospital environment.

scholarly journals Essential Oil Composition and Antibacteral Activity of Vismia Baccifera Fruits Collected from Mérida, Venezuela

2011 ◽  
Vol 6 (5) ◽  
pp. 1934578X1100600 ◽  
Author(s):  
Janne Rojas ◽  
Alexis Buitrago ◽  
Luis Rojas ◽  
Antonio Morales ◽  
María Lucena ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Essential Oil ◽  
Mass Spectra ◽  
Essential Oil Composition ◽  
Gram Negative Bacteria ◽  
Oil Composition ◽  
Gram Negative

The essential oil from the fruits of Vismia baccifera Triana & Planch. (Gutttiferae), collected in June 2009, was analyzed by GC/MS. A yield of 0.6% oil was obtained by hydrodistillation. Twenty-seven components were identified by comparison of their mass spectra with those in the Wiley GC-MS Library data base. The major components were trans-cadin-1,4-diene (36.6%), cis-cadin-1,4-diene (18.8%) and β-caryophyllene (11.9%). The essential oil showed a broad spectrum of antibacterial activity against the important human pathogenic Gram-positive and Gram-negative bacteria Staphylococcus aureus (ATCC 25923), Enterococcus faecalis (ATCC 29212), Escherichia coli (ATCC 25992), Pseudomonas aeruginosa (ATCC 27853) and Klebsiella pneumoniae (ATCC 23357) with MIC values ranging from 9 to 37 μg/mL.

scholarly journals Antibacterial Activity of Borassus flabellifer Vinegar-Graphene Quantum Dots Against Gram-Positive and Gram-Negative Bacteria

2021 ◽  
Vol 33 (11) ◽  
pp. 2662-2666
Author(s):  
Amnuay Noypha ◽  
Paweena Porrawatkul ◽  
Nongyao Teppaya ◽  
Parintip Rattanaburi ◽  
Saksit Chanthai ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Quantum Dots ◽  
Antibacterial Activity ◽  
Graphene Quantum Dots ◽  
Diffusion Method ◽  
Gram Negative Bacteria ◽  
Gram Positive ◽  
Gram Negative ◽  
E Coli

Borassus flabellifer vinegar–graphene quantum dots (BFV-GQDs) were successfully synthesized using a pyrolysis method with Borassus flabellifer vinegar (BFV) as the precursor. All the samples were characterized using ultraviolet-visible spectrophotometry (UV-Vis), scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX). The antibacterial activities of BFV-GQDs against strains of Gram-negative bacteria (Escherichia coli) and Gram-positive bacteria (Staphylococcus aureus) were determined using the agar well diffusion method for preliminary screening, while minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined using the broth macro-dilution method. The zones of inhibition were compared with those of citric acid–graphene quantum dots (CA-GQDs). It was observed that the synthesized BFV-GQDs demonstrated excellent antibacterial activity against Staphylococcus aureus (82.3%) and good antibacterial activity against Escherichia coli (73.3%). The MIC of BFV-GQDs against E. coli was 6.25 mg/mL and S. aureus was 12.5 mg/mL, whereas the MBC of BFV-GQDs against E. coli was 12.5 mg/mL and S. aureus was 25.0 mg/mL.

scholarly journals Binding of Ceftobiprole and Comparators to the Penicillin-Binding Proteins of Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Streptococcus pneumoniae

2007 ◽  
Vol 51 (7) ◽  
pp. 2621-2624 ◽  
Author(s):  
Todd A. Davies ◽  
Malcolm G. P. Page ◽  
Wenchi Shang ◽  
Ted Andrew ◽  
Malgosia Kania ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Streptococcus Pneumoniae ◽  
Binding Proteins ◽  
Tight Binding ◽  
Gram Negative ◽  
Penicillin Binding Proteins ◽  
Gram Positive Bacteria

ABSTRACT Ceftobiprole exhibited tight binding to PBP2a in methicillin-resistant Staphylococcus aureus, PBP2x in penicillin-resistant Streptococcus pneumoniae, and PBP3 and other essential penicillin-binding proteins in methicillin-susceptible S. aureus, Escherichia coli, and Pseudomonas aeruginosa. Ceftobiprole also bound well to PBP2 in the latter organisms, contributing to the broad-spectrum antibacterial activity against gram-negative and gram-positive bacteria.

scholarly journals Syntheses and Antibacterial Studies of Some 1-Phenyl-3-(4-(2-ethanoloxy) phenyl)-5-aryl-1H-pyrazoles

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
Anju Goyal ◽  
Sandeep Jain
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Antibacterial Activity ◽  
Inhibitory Concentration ◽  
Phenyl Hydrazine ◽  
Gram Negative ◽  
H Nmr ◽  
Antibacterial Studies

A series of 1-phenyl-3-(4-(2-ethanoloxy) phenyl)-5-aryl-1H-pyrazoles were synthesized from chalcones, that is, 3-aryl-1-(4-hydroxyphenyl) prop-2-en-1-ones and studied for theirin vitroantibacterial activity. Chalcones1on reaction with phenyl hydrazine in the presence of acetic acid and few drops of hydrochloric acid yielded the corresponding 1-phenyl-3-(4-hydroxyphenyl)-5-aryl-1H-pyrazoles2which on further reaction with 2-chloroethanol furnished the title compounds3. These compounds were characterized by CHN analyses, IR, mass and1H NMR spectral data. All the compounds were evaluated for theirin vitroantibacterial activity against two Gram positive strains (Bacillus subtilisandStaphylococcus aureus) and two Gram negative strains (Escherichia coliandPseudomonas aeruginosa), and their minimum inhibitory concentration (MIC) was determined.

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