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The survival and growth of microorganisms in mascara during use

L A Wilson, A J Julian, D G Ahearn

    American Journal of Ophthalmology
    |April 1, 1975
    PubMed

    Insights

    This study found that mascaras, especially those without preservatives, can become contaminated with bacteria during use. Discontinuing contaminated cosmetics improved blepharitis symptoms in patients.

    Area of Science:

    • Microbiology
    • Ophthalmology
    • Cosmetic Science

    Background:

    • Microbial contamination of cosmetics is a potential health concern.
    • Eye infections can be linked to contaminated makeup products.

    Purpose of the Study:

    • To assess the susceptibility of mascaras to microbial contamination during user application.
    • To investigate the relationship between mascara contamination and blepharitis.

    Main Methods:

    • Examined over 150 mascaras from eight brands for microbial contamination.
    • Investigated mascaras from patients with blepharitis.
    • Isolated and identified microorganisms from used mascaras.

    Main Results:

    • Two preservative-free brands supported microbial growth, including potential eye pathogens.
    • Facial and finger microbes were commonly isolated from used mascaras.
    • Contaminated cosmetics were associated with staphylococcal blepharitis, with improvement upon discontinuation.

    Conclusions:

    • Mascara contamination is influenced by usage, user habits, and product formulation.
    • Avoiding used eye makeup is crucial, especially around ocular surgery.
    • Preservative-free formulations may pose a higher risk for microbial growth.

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