Dari beberapa penelitian yang pernah dilakukan menunjukkan bahwadaun teh hijau (Camellia sinensis) berpotensi memiliki aktivitas anti bakteri,Staphylococcus aureus dan staphylococcus epidermidis sedangkan padaPropionibacterium acne tidak ada potensi. Penelitian ini bertujuan untukmemperoleh sediaan gel yang mengandung ekstrak etanol 70% teh hijau(Camellia sinensis) yang mempunyai aktivitas antibakteri stabil dan aman.Metode yang digunakan adalah Metode difusi cakram (Kirby-Bauer) ditentukanoleh diameter zona hambat yang terbentuk. Semakin besar diameternya makasemakin terhambat pertumbuhannya. Uji stabilitas fisik terhadap sediaan geldilakukan selama 12 minggu pada suhu yang berbeda dan uji keamanan kepadasukarelawan digunakan metode single aplication closed patch epicutaneus testunder occlusion. Hasil uji aktivitas anti bakteri menunjukkan adanya zona hambatpada Staphylococcus aureus dengan ketiga konsentrasi 2,5%, 5%, 10%, hasilnya(11mm,16mm,13mm), dan Stapylococcus epidermidis (2,5%, 5%, 10%) hasilnya(7mm,11mm,12 mm) sedangkan pada P.acne tidak ada. Hasil uji stabilitas fisik12 minggu menunjukkan ketiga konsentrasi sediaan gel adalah stabil dan hasil ujikeamanan memperlihatkan tidak ada iritasi yang diamati selama uji keamananpada penggunaan secara topikal.

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Previous studies reported that green tea leaf (Camellia sinensis) was a

potential anti bacteria againts Propionibacterium acne, Staphylococcus aureus

dan Staphylococcus epidermidis. The aim of the study was to formulate gel

containing 70% ethanol extract of green tea leaf (Camellia sinensis) that have anti

bacteria activity which physically stable and safe. The method we used is disk

diffusion (Kirby-Bauer) determined by diameter of inhibition zone. The bigger

diameter shows the more growth inhibition. Physical stability test was done

against gel formulation during 12 weeks at different temperatures and safety test

against volunteer was done using method of single aplication closed patch

epicutaneus test under occlusion. Result of bacteria activity test showed that there

were inhibition zone on Staphylococcus aureus. Three concentrations of 2,5%,

5%, 10% resulting inhibition diameter of 11 mm,16 mm and 13 mm respectively,

and Staphylococcus epidermidis resulting 2,5%, 5% and 10% inhibition diameter

of 7 mm,11 mm and 12 mm. On P.acne did not show any activity. Results of the

physical stability tests during 12 weeks showed that the three concentration of gel

formulations were stable and no iritation showed during safety test on topical use.