Antibacterial effectiveness of green tea extract (Camellia sinensis L.) liquid soap against Staphylococcus aureus and Streptococcus pyogenes

Meutia Rizki  Wibowo; Heni  Wijayanti; Isy  Royhanaty

doi:10.34310/jbsh.v1.i2.63

Authors

Meutia Rizki Wibowo Program Studi Ilmu Biomedis, Fakultas Ilmu Keperawatan dan Kesehatan, Universitas Karya Husada, Semarang, Indonesia Author
Heni Wijayanti Program Studi Ilmu Biomedis, Fakultas Ilmu Keperawatan dan Kesehatan, Universitas Karya Husada, Semarang, Indonesia Author
Isy Royhanaty Program Studi Ilmu Biomedis, Fakultas Ilmu Keperawatan dan Kesehatan, Universitas Karya Husada, Semarang, Indonesia Author

DOI:

https://doi.org/10.34310/jbsh.v1.i2.63

Keywords:

Camellia sinensis; liquid soap; Staphylococcus aureus ; Streptococcus pyogenes; inhibition zone

Abstract

Background: S. aureus and S. pyogenes are Gram-positive bacteria that are the main causes of impetigo, a skin infection marked by a red rash. Impetigo is commonly treated with antibiotics, but long-term use risks side effects, so a complementary alternative such as green tea leaf extract (Camellia sinensis) is needed. Aim: To determine the effect of liquid soap containing 7%, 10%, and 13% green tea extract on the inhibition zone of S. aureus and S. pyogenes. Methods: A true experimental study with a post-test-only with control group design used five treatment groups. Inhibition zone diameters were measured with a caliper and analysed using one-way ANOVA with Games-Howell post-hoc comparisons and Mann-Whitney to compare the inhibition zones between the two bacterial species. Results: The 10% concentration produced the highest mean inhibition zone, 5.53 mm against S. aureus and 6.33 mm against S. pyogenes (moderate category), significantly larger than the negative control (p<0.05) but still below the tetracycline positive control. No significant difference was found between the two species (p=0.381). Conclusion: Green tea extract liquid soap shows moderate antibacterial activity against S. aureus and S. pyogenes, with comparable potential against both pathogens as a topical complementary therapy for impetigo.

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