Research papers about antmicrobial activity of plants
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Please join StudyMode to read the full document. Antimicrobial Properties of Plants A plant with antimicrobial properties means that it destroys or inhibits the growth of bacteria and fungi. Aim: our aim was to see weather or not garlic, mint and grass contained antimicrobial properties and if they did how effective they were we were trying to see weather the bacteria will grow around the different plants. Control Test: As a control test what we did was, we dipped a paper disc into the alcohol solution we used to dissolve the plants; the reason we did this was to test to see weather or not the alcohol would affect the end result. If bacteria grew around the alcohol- paper disc this would mean the alcohol had no effect on the bacteria.
To determine the antimicrobial potential of guava Psidium guajava leaf extracts against two gram-negative bacteria Escherichia coli and Salmonella enteritidis and two gram-positive bacteria Staphylococcus aureus and Bacillus cereus which are some of foodborne and spoilage bacteria. The guava leaves were extracted in four different solvents of increasing polarities hexane, methanol, ethanol, and water. According to the findings of the antibacterial assay, the methanol and ethanol extracts of the guava leaves showed inhibitory activity against gram-positive bacteria, whereas the gram-negative bacteria were resistant to all the solvent extracts. The methanol extract had an antibacterial activity with mean zones of inhibition of 8.