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  • Title: [Microbiological quality control of lipsticks which are on the market in our country].
    Author: Akin A, Altanlar N.
    Journal: Mikrobiyol Bul; 1989 Oct; 23(4):369-78. PubMed ID: 2488946.
    Abstract:
    In this study, microbiological quality control of lipsticks has been investigated. In 81 samples, we found that 34 of them (42%) had total aerobic plate count and 19 of them (23.5%) were found to consist mold and yeast which are not allowed by the cosmetic regulations. In none of the samples, pathogen microorganisms such as S. aureus, P. aeruginosa, E.coli, Salmonella and Shigella were detected. Indeed, after carefully examining of the microbiological content of these lipsticks, their biostatistical efficiency was also determined. In each counting procedure, for different bacteria, it was found that only one sample was effective at the 3rd and 14th day. The remaining 9 lipstick samples (90%) were kept under investigation until the end of the testing procedure on the 28th day.
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