Antimicrobial activity and phytochemical screening of Alpinia malaccensis (Ran-kiriya) against food-borne bacteria
Journal of applied microbiology
Published for the Society for Applied Bacteriology by Blackwell Science
School of Medical and Health Sciences
AIMS: Investigation of antimicrobial activity and phytochemicals of Alpinia malaccensis (Ran-kiriya) against foodborne bacteria Staphyloccocus aureus, Listeria monocytogenes, Escherichia coli and Salmonella Typhimurium.
METHODS AND RESULTS: Antibacterial activity was tested on the above four foodborne bacteria using agar disc diffusion and broth dilution assay. Alpinia malaccensis rhizome extract chemical composition was determined using gas chromatography-mass spectrometry (GCMS). Active compound was identified using thin-layer chromatography (TLC) and confirmed by nuclear magnetic resonance spectroscopy (NMR). The A. malaccensis rhizome hexane crude extract showed significantly (P < 0·05) higher diameter of inhibition (DIZ) 40 ± 0·52, 38 ± 0·96 and 36 ± 1·45 mm for S. aureusSA113, MSSASS25D and methicillin-resistant S. aureus compared with other tested bacteria. The minimum inhibition concentration and minimum bactericidal concentration were 0·625 and 5 mg ml
CONCLUSIONS: Bioactive 1'ACA of A. malaccensis showed strong antibacterial activity against S. aureus strains including MRSA strain.
SIGNIFICANCE AND IMPACT OF THE STUDY: This study is the first to identify 1'ACA from A. malaccensis. The crude or purified compound could potentially be developed as antimicrobials.