@article {1655, title = {Antimicrobial Efficacy, Cytotoxicity, Acute Oral Toxicity, and Phytochemical Investigation of the Aqueous and Methanolic Stem Bark Extracts of Bridellia micrantha (Hochst.) Baill}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {September 2021}, pages = {1248-1256}, type = {Research Article}, chapter = {1248}, abstract = {

Introduction: Microbial infections cause high morbidity and mortality in humans globally. Antimicrobial resistance, emergence of new strains, high costs of antibiotics, inaccessibility-especially in remote areas, and adverse effects, impede successful eradications of pathogens, hence the need for novel strategies. Bridellia micrantha is used in traditional medicine to treat microbial infections; however, it has not been empirically validated. Methods: Antimicrobial activity of the aqueous and methanolic stem bark extracts of Bridellia micrantha was investigated using the disk diffusion and broth microdilution techniques, described by the Clinical Laboratory Standards Institute (CLSI) guidelines. The brine shrimp lethality assay technique was used to investigate the cytotoxic effects of the studied plant extracts in exposed nauplii. Acute oral toxicity effects of the studied plant extracts in Winstar rats were investigated following the up-and-down procedure described by the Organisation for Economic Development and Co-operation (OECD). Qualitative phytochemical screening was performed following standard procedures. Results: The aqueous and methanolic extract of B. micrantha indicated varied antimicrobial activities against E. coli, S. typhimurium, S. aureus, and C. albicans, with inhibition zones ranging from 6.00mm to 19.00mm. Furthermore, the studied plant extracts exhibited low MIC values (<=100 μg/ml) on selected microbes. Since the MIC values were much lower than 1000μg/ml (the cutoff for antimicrobial efficacy appraisal), it is anticipated that, the studied plant extracts can be strong antibiotics. The aqueous and methanolic stem bark extracts of B. micrantha were cytotoxic to brine shrimp nauplii, with LC50 values of 486.67{\textpm}3.15 μg/ml and 458.33{\textpm}2.87 μg/ml, respectively; however, these extracts did not elicit any observable signs of toxicity in rat models. Pharmacologically active phytochemicals, including flavonoids, alkaloids, saponins, tannins, phenols, and anthraquinones were detected in the two studied extracts. Conclusions: The aqueous and methanolic stem bark extracts of B. micrantha have appreciable antimicrobial activity against E. coli, S. typhimurium, S. aureus and C. albicans. Besides, the studied plant extracts are cytotoxic to brine shrimp nauplii; but they do not cause acute oral toxicity effects in rat models. Additionally, the studied plant extracts contain bioactive phytochemicals, with antimicrobial activity.

}, keywords = {Brine shrimp lethality Assay, Median lethal concentration (LC50), median lethal dose (LD50), Minimum inhibitory concentration, Zone of Inhibition}, doi = {10.5530/pj.2021.13.158}, author = {Joseph M Kathare and James M Mbaria and Joseph M Nguta and Gervason A Moriasi and Alfred O Mainga} } @article {1153, title = {Fumaria indica (L), a Famous Medicinal Herb of Tribal Regions of Jabalpur, Madhya Pradesh: Broad Spectrum Antibacterial and Phytochemical Profilng Against Some Pathogenic Microorganisms}, journal = {Pharmacognosy Journal}, volume = {12}, year = {2020}, month = {May 2020}, pages = {619-623}, type = {Research Article}, chapter = {619}, abstract = {

This work describes the broad spectrum antibacterial properties of methanolic and chloroform extracts of Fumaria indica herb in different concentrations (50 mg/ml, 100 mg/ml and 150 mg/ ml) against Bacillus subtilis(MTCC 10110), Staphylococcus aureus(MTCC96), Escherichia coli (MTCC 77), Pseudomonas aeruginosa (MTCC1688) and Klebsiella pneumonia (MTCC4032) using agar well diffusion method compared to standard antibiotic ciprofloxacin. Results have shown significant activities against the tested microorganisms viz., Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa than other strains. Minimum inhibitory as well as minimum bactericidal concentrations against Bacillus subtilis and Klebsiella pneumonia were evaluated. The study indicates the possible potentiality of F. indicato act as an active antibacterial agent in the modern drug formulations. As the target plant species serves for the tribal medicinal purpose in several tribal regions of Madhya Pradesh, hence, the aim of the present study is to link comparatively the possible traditional use of this herb with the modern antibiotic usage.

}, keywords = {Antibacterial activity, Fumaria indica, Phytochemicals, Tribes, Zone of Inhibition}, doi = {10.5530/pj.2020.12.92 }, author = {Shoket Ali and Shikha Bansal and Ravi Prakash Mishra} } @article {446, title = {Pharmacognostic Evaluation \& Antimicrobial Activity of Endangered Ethnomedicinal Plant Crepidium acuminatum (D. Don) Szlach}, journal = {Pharmacognosy Journal}, volume = {9}, year = {2017}, month = {November 2017}, pages = {s56-s63}, type = {Original Article}, chapter = {s56}, abstract = {

Background: Crepidium acuminatum (D. Don) Szlach (family Orchidaceae) is an ethnomedicinal plant. It is used in breathing disorders, burning sensation, Cough, decrease in bone tissue, blood disorders, tuberculosis, as refrigerant, aphrodisiac, in insect bites, rheumatism, as tonic and in general debility. It is vital component of Ayurvedic formulation \“Astavarga\” with trade name \“Jeevak means vitality of life. Despite the common utilization of this plant, no conclusive study has been reported so far regarding the pharmacognostic evaluation and antimicrobial activity. Aim: The present study was carried to evaluate pharmacognostic evaluation and the potential of C. acuminatum as antimicrobial. Materials and Methods: Organoleptic, histochemical, microscopic, physicochemical, extractive yield were studied to standardise pharmacognostic characters and well diffusion method were carried out for antimicrobial activity. Five extracts viz. Hexane, Chloroform, Ethanol, Ethyl acetate and aqueous were evaluated against 4 bacterial strains viz. E. coli (MTCC 40), S. aureus (MTCC 87), P. aeruginosa (MTCC 424), B. subtilis (MTCC 121). Results: The diagnostic characters were evaluated and documented. All the extracts showed good antimicrobial activity. Conclusion:\ Obtained standards will provide referential information for correct identification, purity, standardization and preparation of monograph. The work confirms that the studied plant has potent antimicrobial activity and has potential for antimicrobial drug. These results may constitute a basis for promising future applied research that could investigate the use of this plant as antimicrobial drug.

}, keywords = {Antimicrobial, Crepidium acuminatum (D. Don) Szlach, Histochemical, Pharmacognostic evaluation, Physicochemical, Zone of Inhibition}, doi = {10.5530/pj.2017.6s.158}, url = {http://fulltxt.org/article/382}, author = {Mamta Arora and Gurjinder Kaur and Parvinderdeep S Kahlon and Anupama Mahajan and Jaspreet K Sembi} }