@article {705, title = {Evaluation of Different Fractions of Garcinia kola Extracts against Multidrug Resistant Clinical Bacterial and Fungal Isolates}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {August 2018}, pages = {1055-1060}, type = {Original Article}, chapter = {1055}, abstract = {

Background: The effectiveness of antibiotics used in the treatment of bacterial infections has been on the decline due to bacterial resistance. To improve clinical management of recalcitrant bacterial infections, alternative therapy such as medicinal plant products are now being evaluated. This study investigates the antimicrobial effects of Garcinia kola fractions on clinical isolates of multidrug resistant gram negative bacteria and Candida. Materials and Methods: Escherichia coli\ , Acinetobacter baumannii, Serratia marcescens and Candida species were used for the study. Microbial isolation and antimicrobial susceptibility test was carried out using basic microbiological procedures. Confirmation of all isolates was done using the VITEK 2 compact automated system (BioMerieux, Marcy I\’Etoile France). The powdered dried seeds of G. kola were extracted with 70\% methanol for 7 days, using a cold maceration method. The crude extracts were evaporated to dryness, using different solvents to obtain the fractions according to standard fractionation techniques. Results: The aqueous, butanol, chloroform and hexane fractions at minimum inhibitory concentrations (MIC) of 25mg/ml were active against A. baumannii. Ethyl acetate fraction at MIC of 20 mg/ml also produced growth inhibition of same isolates. At the same MICs, the different fractions were observed to inhibit the growth of candida albicans (CF1) isolate. Overall, aqueous fraction of G. kola produced more growth inhibition followed by butanol fractions, with chloroform fractions producing the least effects. Conclusion: The antibacterial potencies of these extracts could be useful for the treatment of multi-drug-resistant A. baumannii. The aqueous fraction showed better activities than the other fractions studied.

}, keywords = {Clinical isolates, Garcinia kola, Minimum inhibitory concentration, Multidrug resistant bacteria, Sensitivity}, doi = {10.5530/pj.2018.5.178}, author = {Lorina Ineta Badger-Emeka and Hany Ezzat Khalil and Promise Madu Emeka} } @article {477, title = {Phytochemical Analysis of Nigella sativa L. Utilizing GC-MS Exploring its Antimicrobial Effects against Multidrug-Resistant Bacteria}, journal = {Pharmacognosy Journal}, volume = {10}, year = {2018}, month = {December 2017}, pages = {99-105}, type = {Original Article}, chapter = {99}, abstract = {

Introduction: The alarming increase in bacterial strains resistant to existing antimicrobial agents has demanded alternative strategies. Medicinal plants are now considered as an alternative treatment because of their secure choice in several diseases. Among them, Nigella sativa is a promising traditional herb having rich medical background. The aim of the study is to perform phytochemical analysis of Nigella sativa L. Utilizing Gas chromatographic\–mass spectrometric (GC/MS) exploring its antioxidant and antibacterial activity against multidrug resistant (MDR) gram-positive and gram-negative bacteria. Methods: Total phenolic, tannin, and flavonoid content of N. sativa seed extracts and its commercially available oil were determined. Their radical scavenging activity using DPPH was also tested. The antibacterial activity of N. sativa seed extracts and its oil against MDR gram-positive and gram-negative bacterial strains was studied using disc diffusion test and the biofilm formation assay. GC-MS studies were also performed. Results: Among the different preparations used, N. sativa oil showed the highest antioxidant and antibacterial activity against highly resistant gram-positive bacteria with the greatest suppression of biofilm formation, which was attributed to its high bioactive contents. Conclusion: This study indicates that N. sativa extracts and its oils can be used as natural antibacterial agents to treat infections caused by multidrug resistant bacteria.

}, keywords = {Antibacterial, Antioxidant, GC-MS analysis, Multidrug resistant bacteria, Nigella sativa}, doi = {10.5530/pj.2018.1.18}, url = {http://fulltxt.org/article/404}, author = {Fatima A. Saleh and Nada El-Darra and Karim Raafat and Iman El Ghazzawi} }