ABSTRACT
This study explores the antimicrobial activity of ethanolic and aqueous extracts derived from Zingiber officinale, commonly known as ginger. With the increasing global concern regarding antimicrobial resistance, there is a growing interest in exploring alternative sources of antimicrobial agents. Z. officinale, a widely consumed spice with known medicinal properties, has garnered attention for its potential antimicrobial effects. This study investigates the antimicrobial properties of ethanolic and aqueous extracts of Z. officinale against a range of microorganisms, including bacteria and fungi; Staphylococcus aureus, Bacillus subtilis, Klebsiella pneumoniae, Pseudomonas aeruginosa, Escherichia coli, Candida albicans, Aspergillus niger.The methodology involves extraction of active compounds from ginger rhizomes using ethanol and water, followed by evaluation of their antimicrobial activity using standard microbiological assays. Results indicate that both ethanolic and aqueous extracts exhibit significant antimicrobial activity against various pathogens, including common bacterial strains such as Bacillus subtilisandKlebsiella pneumonia, as well as fungal species like Candida albicans.There was a significant positive regression against the aqueous ginger extracts in Aspergillus niger (P = 0.765), whereas E. coli (p = 0.011), B. subtilis (p = 0.007), K. pneumonia (p = 0.003), P. aeruginosa (p = 0.028), C. albicans (p = 0.017) and S. aureus (p = 0.013) had significant positive regression indicating concentration dependence. Against the ethanolic ginger extracts, E. coli (0.077), P. aeruginosa (p = 0.173) and S. aureus (p = 0.064) did not display significant positive regression but those of B. subtilis (p = 0.027), K. pneumonia (p = 0.041), C. albicans (p = 0.045) and A. niger (p = 0.017) revealed significant positive regression. Overall, the ethanolic extracts showed higher inhibitory activity compared to aqueous extracts as the ethanol extracts was more successful in extracting the bioactive compounds. These findings underscore the therapeutic potential of Z. officinale extracts as natural antimicrobial agents, offering a promising avenue for the development of novel antimicrobial therapies. Further research is needed to elucidate the underlying mechanisms of action and to evaluate the clinical efficacy and safety of Z. officinale extracts for antimicrobial applications.
