Pembuktian Aktivitas Antibakteri Ekstrak Daun Ketul (Bidens pilosa L) Terhadap Pertumbuhan Escherechia Coli Secara Invitro

Traditionally, people of every ethnicity often use traditional medicines made from plants to treat diseases that attack humans. Likewise, in Oelnasi Village, Central Kupang District, Regency, used drink boiled ketul leaves (Bidens pilosa L) cure diarrheal diseases. The certainty the medicinal efficacy taken Timor has never been scientifically proven. Therefore, research prove it needs be done. This study aims activity extract leaf as an antibacterial against growth Escherichia coli In vitro. type is a laboratory experiment using Posttest Only Control Group Design which consists four treatments were repeated three times. data analyzed one-way ANOVA and continued with smallest significant difference test (BNT) significance level 1%. results showed pilosa, was proven have Based on 1% Key BNT follow-up 20% concentration significantly different 40%, 60% 80% concentrations; 40% 20%, 80%; concentrations 60%.