Abstract
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 Aloe arborescens and Aloe barbadensis 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 A. arborescens and A. barbadensis are at higher added concentrations comparable to commercial aloe products, especially against microbial cultures of Bacillus cereus, Candida albicans, and Pseudomonas aeruginosa, 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 A. arborescens on tested microorganisms, which is less known and less researched. These results show great potential of A. arborescens for further use in medicine, cosmetics, food, and pharmaceutical industries.
Highlights
IntroductionVarious natural raw materials from plants (fruits, herbs, seeds, spices, and vegetables), animals (eggs, milk, tissues, and mucus), microorganisms (bacteria and fungi), and their extracts are interesting, as they exhibit various pharmaceutical, medicinal, and other biological activities [1,2,3]
Various natural raw materials from plants, animals, microorganisms, and their extracts are interesting, as they exhibit various pharmaceutical, medicinal, and other biological activities [1,2,3]
Research has shown that natural juices and gels of A. arborescens and A. barbadensis are at higher added concentrations comparable to commercial aloe products, especially against microbial cultures of Bacillus cereus, Candida albicans, and Pseudomonas aeruginosa, whose growths were completely inhibited at a microbial concentration of 600 μg/mL
Summary
Various natural raw materials from plants (fruits, herbs, seeds, spices, and vegetables), animals (eggs, milk, tissues, and mucus), microorganisms (bacteria and fungi), and their extracts are interesting, as they exhibit various pharmaceutical, medicinal, and other biological activities [1,2,3]. One of the most applied herbal medicines worldwide is A. barbadensis, a succulent plant with many beneficial properties. Even the various names such as “magic plant”, “wonder plant”, and “nature healer” as well as the fact that it is one of the oldest mentioned plants with healing properties and health benefits say a lot about how popular it is in various branches of traditional medicine such as Ayurveda, siddha, homeopathy, and Unani [4,5]. The industrial use of aloe vera has developed greatly, as the gel and the juice are used in the food as well as the pharmaceutical and the cosmetic industries [9]. The gel is often used as a base for creams, lotions, soaps, shampoos, facial cleansing tonics, and other products due to its moisturizing effect [10]
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