The purpose of this study was to determine the antibacterial activity of sembung legi leaf gel (Blumea balsamifera L.) and its effect on wound healing in mice (Mus musculus L.). The leaves of sembung legi are first extracted by maceration and then made gel preparations with a formula of 3%, 4%, and 5%. Parameters in this research is antibacterial test against Staphylococcus aureus bacteria and the length of time for wound healing. The activity of antibacterial is tested by measuring the diameter of the zone of inhibition against the growth of S.aureus bacteria. Gel test as a wound healing preparation was carried out on mice.A total of 15 mice aged 2 - 3 months were divided into 5 treatment groups, namely negative control (without treatment), positive control (Kalmicetine 10%), K1 (3% gel), K2 (4% gel), and K3 (5% gel). The back of the mice was injured with a 1 cm incision, then treated by sembung legi leaf gel 3 times a day for 14 days. Wound healing time data were analyzed by ANOVA and LSD test. The results showed that sembung legi leaf gel could inhibit the growth of S.aureus bacteria with an average diameter of the clear zone for each treatment, namely KN (0.0 mm), KP (30.15 mm), K1 (4.77 mm), K2 ( 4.81 mm), and K3 (6.31 mm). The parameters of the mean length of time for wound healing with healing parameters were the absence of erythema, swelling, wound closure, and healing for all treatments, namely KN (12.3 days), KP (8.3 days), K1 (11.3 days), K2 (10.6 days), and K3 (9.6 days). It is concluded that sembung legi leaf gel can inhibit the growth of S. aureus bacteria and speed up wound healing time, so that it can be used as an alternative gel preparation in wound healing. Keywords: Antibacterial activity; Leaf Blumea balsamifera L.; Mice; Staphylococcus aureus; Wound healing. Abstrak Tujuan penelitian ini adalah untuk mengetahui aktivitas antibakteri gel daun sambung legi (Blumea balsamifera L.) dan pengaruhnya terhadap penyembuhan luka pada mencit (Mus musculus L.). Daun sembung legi dimaserasi dan dibuat sediaan gel dengan formula 3%, 4%, dan 5%. Penelitian ini menguji antibakteri S. aureus dengan mengukur diameter zona hambat terhadap pertumbuhan bakteri dan lama waktu penyembuhan luka. Uji gel sebagai sediaan penyembuh luka dilakukan terhadap hewan uji mencit. Sebanyak 15 ekor mencit berumur 2 – 3 bulan dibagi ke dalam 5 kelompok perlakuan yaitu kontrol negatif (tanpa perlakuan), kontrol positif (Kalmicetine 10%), K1 (gel 3%), K2 (gel 4%), dan K3 (gel 5%). Punggung mencit dilukai dengan sayatan sepanjang 1 cm, kemudian dioleskan gel daun sembung legi sebanyak 3 kali sehari selama 14 hari. Data lama waktu penyembuhan luka dianalisis dengan ANOVA dan uji LSD. Hasil penelitian menunjukkan bahwa gel daun sembung legi dapat menghambat pertumbuhan bakteri S. aureus dengan rata-rata diameter zona bening setiap perlakuan yaitu KN (0,0 mm), KP (30,15 mm), K1 (4,77 mm), K2 (4,81 mm), dan K3 (6.31 mm). Rerata lama penyembuhan luka dengan parameter penyembuhan berupa tidak adanya eritema, pembengkakan, luka menutup, dan sembuh untuk semua perlakuan yaitu KN (12.3 hari), KP (8,3 hari), K1 (11,3 hari), K2 (10,6 hari), dan K3 (9,6 hari). Kesimpulan: Gel daun sembung legi dapat menghambat pertumbuhan bakteri S. aureus dan mempercepat waktu penyembuhan luka, sehingga dapat dijadikan sebagai sediaan gel alternatif dalam penyembuhan luka. Kata Kunci : Aktivitas antibakteri; Daun Blumea balsamifera L.; Mencit; Penyembuhan luka; Staphylococcus aureus.
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