Date of Completion

2024

Document Type

Research Project

Degree Name

Grade 12

Keywords

sunscreen, photoprotection, Staphylococcus epidermidis, Staphylococcus aureus, agar well diffusion assay, Kirby-Bauer disc diffusion

Abstract

Sunscreens are known to protect the skin from the harmful ultraviolet rays from the sun. Exposure to ultraviolet rays can cause increased sebum production that correlates with the development of acne vulgaris. In this study, six sunscreen samples of different types, including physical, chemical, and hybrid, were tested for their antibacterial properties against Staphylococcus epidermidis and Staphylococcus aureus, which are the organisms that are involved in the proliferation of acne vulgaris. The antibacterial properties of the sampled sunscreens were tested using the agar well diffusion method and the Kirby-Bauer Disc diffusion method. The test organisms, S. epidermidis and S. aureus exhibited resistance to the sampled sunscreens, indicating that the selected hybrid, physical, and chemical sunscreens do not have antibacterial properties. Thus, further research is needed to assess the possible additive that enhances the antibacterial capability of sunscreens against acnerelated bacteria to contribute to a holistic approach to treating acne vulgaris.

First Advisor

Pauline C. Cueno

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