This research was conducted to determine the effectiveness test of papaya leaf extract with a concentration of 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80% and 90% and 100% against staphylococcus epidermidis bacteria. Staphylococcus epidermidis is a gram-positive bacterium in the form of cocci and is harmful to humans. This research was conducted with an experimental method with a post-test only design and sampling with a purposive sampling method. The investigation of the effectiveness of papaya leaf extract against staphylococcus epidermidis was done by diffusion using paper discs, namely by calculating the diameter of the bacterial inhibition zone of paper discs that have been moistened with papaya leaf extract. The results of this study were analyzed out with the One-Way ANOVA test followed by the Post Hoc Test. The test showed that there were significant differences from each treatment given with a 95% confidence index. The bacteria treated with papaya leaf extract 100% against staphylococcus epidermidis had the highest average inhibitory zone power compared to other concentrations of 14.97 mm. The papaya leaf extract 100% has the best antibacterial effect compared to other concentrations because the best inhibitory zone power is found on those extract concentrations.
Abstrak Salmonella typhi adalah bakteri penyebab demam tifoid, yaitu penyakit yang diserbarkan lewat makanan danminuman yang telah tercemar feses atau kotoran manusia dimana penyakit ini disebabkan oleh suatu kuman yangberbentuk basil yaitu Salmonella typhi . Penelitian ini bertujuan demi mengetahui uji efektifitas ekstrak daunsambung nyawa dengan konsentrasi 25%, 50%, 75%, dan 100% terhadap bakteri Salmonella typhi dengankloramfenikol sebagai pembandingnya. Penelitian ini dilakukan di Laboratorium Organik Fakultas Matematika danIlmu Pengetahuan Alam Universitas Sumatera utara dan di Laboratorium Farmasi dan Toksikologi Fakultas FarmasiUniversitas Sumatera Utara. Penelitian ini dilakukan dengan metode eksperimental desain post-test only design,pengambilan sampel dengan metode Purposive sampling. Uji efektivitas daun sambung nyawa terhadap bakterisalmonella typhi dilakukan dengan cara difusi menggunakan kertas cakram, dengan menghitung diameter zonahambat bakteri terhadap kertas cakram yang sudah dibasahi dengan ekstrak daun sambung nyawa dan kertas cakramyang mengandung kloramfenikol. Hasil penelitian dapat dilihat bahwa pada konsentrasi 25% - 100% peningkatanrerata diameter zona hambat terus terjadi, yaitu pada konsentrasi 25% 11,75 mm, pada konsentrasi 50% 14,25 mm, pada konsentrasi 75% 12,65 mm dan pada konsentrasi 100% 15,05 mm, zona hambat rerata pada kontrol positifberdiameter 26,4 mm terhadap pertumbuhan bakteri Salmonella typhi. Terdapat hal yang dapat disarankan padapenelitian ini yaitu perlunya dilakukan penelitian pengembangan tentang efektivitas antibakteri ekstrak daunsambung nyawa (Gynura procumbens (Lour.)Merr.) dengan menggunakan konsentrasi yang berbeda untukmenghambat pertumbuhan bakteri Salmonella typh, dan perlunya dilakukan penelitian yang lebih lanjut denganmemakai bagian lainnya dari tumbuhan sambung nyawa (Gynura procumbens (Lour.)Merr.) terhadap bakteriSalmonella typhi. Kata kunci : Gynura, Demam tifoid, Sambung nyawa, Salmonella typhi, Obat alami
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