Ahmed Faisal Sumit, Assistant Professor, Department of Genetic Engineering and Biotechnology, University of Dhaka, Bangladesh; E-mail:
Mymensingh Med J. 2021 Apr;30(2):478-484.
Cosmetic products are often inadequately preserved that provide favourable environment for microbial growth. These emphasize the need for regular investigation of cosmetics in terms of microbial quality and preservative capacity. This study aimed to evaluate the microbial quality, in vitro antibacterial activity and preservative capacity of several popular cosmetics collected from the neighbouring health-care stationary shops in Dhaka city from October 2019 to December 2019. Here, a total of five categories of seven different cosmetic products were subjected to evaluate microbial load, in vitro antibacterial activity and preservative capacity. Among the seven cosmetic products, the viable bacterial count in two cosmetics (All Clear and Sunsilk Shampoo) were found within the acceptable range that was <10³ CFU/ml. None of the cosmetics were found contaminated with fungus and pathogenic organisms. Conversely, three (one Mouthwash and two shampoo) products showed in vitro antibacterial activity against E. coli, S. aureus, Pseudomonas spp., Salmonella spp., Shigella spp. Only single cosmetic product (Cute coconut oil) did not meet the criteria of preservative capacity, while rest six products fulfil the requirements. Thus, our findings revealed a huge load of microorganisms in spite of having adequate preservative capacity in most of the tested products.
化妆品通常保存不当，为微生物生长提供了有利环境。这强调了需要定期检查化妆品的微生物质量和防腐剂容量。本研究旨在评估 2019 年 10 月至 12 月从达卡市附近的保健站商店收集的几种流行化妆品的微生物质量、体外抗菌活性和防腐剂容量。在这里，总共有五类七种不同的化妆品被用来评估微生物负荷、体外抗菌活性和防腐剂容量。在这七种化妆品中，两种化妆品（All Clear 和 Sunsilk 洗发水）中的活菌数在可接受范围内，<10³CFU/ml。没有一种化妆品受到真菌和病原体的污染。相反，三种（一种漱口水和两种洗发水）产品对大肠杆菌、金黄色葡萄球菌、铜绿假单胞菌、沙门氏菌、志贺氏菌表现出体外抗菌活性。只有一种化妆品（可爱椰子油）不符合防腐剂容量标准，而其余六种产品则符合要求。因此，我们的研究结果表明，尽管大多数测试产品都有足够的防腐剂容量，但仍存在大量的微生物。
