The Study of the Antibacterial Effect of Anthocyanin Pigment Extracted From Red Cabbage (Brassica oleracea var. capitata f. rubra) and Red Radish Peels (Raphanus sativus. var. sativus)

Abstract The need to search for natural products that offer a safe alternative to drugs and industrial products that often cause side effects and harm human health is growing over the years. Antibiotic resistance is increasing as a result of its excessive and unconscious use. In this study, the weakly acidified with HCl, water and ethanol extracts of the anthocyanin from from red Cabbage ( Brassica oleracea . var. capitata f. rubra ) and, the peels of red Radish ( Raphanus sativus . var. sativus ) which are available on markets throughout the year, were examined for their antibacterial activity on Staphylococcus epidermidis and Acinetobacter baumannii . The results of both cabbage and radish anthocyanin extracts on S.epidermidis and A.baumannii showed positive antibacterial effect with wide range of differences which is increasing directly in proportion with anthocyanin extract concentrations for both cabbage and radish. The dilutes of cabbage anthocyanin extract at concentration 95% ethanol mostly had significantly higher antibacterial effect on S.epidermidis than dilutes of cabbage anthocyanin extract at concentration 80% ethanol. while the antibacterial effect that radish anthocyanin extracts dilutes had on S.epidermidis were non-significant between 95% ethanol and 80% ethanol concentrations dilutes. on the other hand, the results showed that the antibacterial effect both cabbage and radish anthocyanin extracts exhibited on A.baumannii were non-significant between the dilutes of extracts at 95% ethanol and 80% ethanol of cabbage and radish extracts individually. The minimum inhibition concentration (MIC) for cabbage anthocyanin extracts were 5mg/ml of 80% ethanol at 27 mm inhibition zone for S.epidermidis and 23 mm inhibition zone for A.baumannii . while the minimum inhibition concentration (MIC) for radish anthocyanin extracts were also 5mg/ml of 80% ethanol at 20 mm inhibition zone for S.epidermidis and 18 mm inhibition zone for A.baumannii