Kata Kunci

Abstrak

Research into substances that are efficacious as new antibiotics to inhibit or kill bacteria that are resistant to antibiotics needs to be done. One simple substance that has antibacterial effects is green tea leaves (Camellia sinensis). The anti-Sacher content of green tea leaf anchovies (Camellia sinensis), namely alkaloids, saponins, tannins, and catechins (polyphenols). Tea is one of the superior products of plantations in Indonesia. The purpose of this study was to determine the optimization of the inhibitory power of green tea leaf extract (Camellia sinensis) against the growth of Escherichia coli bacteria. This research was experimental laboratory using the Kirby Bauer disk diffusion method, namely Mueller Hinton Agar (MHA) media that has been planted with cultures of Escherichia coli and given disks soaked in green tea leaf extract (Camellia sinensis) concentrations of 25%, 50%, 75%, and 100%, and then incubated for 24 hours. From the results of the study, it can be concluded that green tea leaf extract (Camellia sinensis) can be used as an antibacterial. The optimal results in this study are Escherichia coli bacteria at a concentration of 25% with an average diameter of 10.25 mm. This is because the main content of green tea leaves (Camellia sinensis) catechins and alkaloids as powerful antibacterials.