Antimicrobial Efficiency of <i>Aloe arborescens</i> and <i>Aloe barbadensis</i> Natural and Commercial Products
2021
Kaja Kupnik | Mateja Primožič | Željko Knez | Maja Leitgeb
Nowadays, there are many commercial products from natural resources on the market, but they still have many additives to increase their biological activities. On the other hand, there is particular interest in natural sources that would have antimicrobial properties themselves and would inhibit the growth and the reproduction of opportunistic microorganisms. Therefore, a comparative antimicrobial study of natural samples of aloe and its commercial products was performed. Qualitative and quantitative determination of antimicrobial efficiency of <i>Aloe arborescens</i> and <i>Aloe barbadensis</i> and its commercial products on fungi, Gram-negative, and Gram-positive bacteria was performed. Samples exhibited antimicrobial activity and slowed down the growth of all tested microorganisms. Research has shown that natural juices and gels of <i>A. arborescens</i> and <i>A. barbadensis</i> are at higher added concentrations comparable to commercial aloe products, especially against microbial cultures of <i>Bacillus cereus</i>, <i>Candida albicans</i>, and <i>Pseudomonas aeruginosa</i>, whose growths were completely inhibited at a microbial concentration of 600 μg/mL. Of particular importance are the findings of the good antimicrobial efficacy of fresh juice and gel of <i>A. arborescens</i> on tested microorganisms, which is less known and less researched. These results show great potential of <i>A. arborescens</i> for further use in medicine, cosmetics, food, and pharmaceutical industries.
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