Lucina, Lovely C.Sabado, Genoa P.2025-06-302025-06-302024-05Lucina, L.C., Sabado, G.P. (2024). Ethnomedicinal survey and antibacterial assay of Lantana camara L. and Heliotropium indicum L. used by Bago-Kankanaey communities of Alilem, Ilocos Sur, Philippines [Unpublished Undergraduate Thesis] Don Mariano Marcos Memorial State University - North La Union Campus, Sapilang, Bacnotan, La Union. DMMMSU Institutional Repository.https://lakasa.dmmmsu.edu.ph/handle/123456789/168Over time, with the emergence of modern treatment options, traditional wisdom continues to decline. The number of indigenous cultures with deep knowledge of plants is quite small; hence, research on these medicinal plants must be conducted due to the persistent and substantial need to find plants with medicinal properties as infectious illnesses become more prevalent and emerge. An ethnomedicinal survey and antibacterial assay were conducted on selected plants used by Bago-Kankanaey communities in Alilem, Ilocos Sur, Philippines, to document and identify the medicinal plants used in traditional medicine, determine the phytochemicals in crude ethanolic leaf extracts, and test the antibacterial activity of Lantana camara L. and Heliotropium indicum L. against three human pathogenic bacteria. The ethnomedicinal survey involved 87 informants from the Bago-Kankanaey groups, all elderly members with extensive knowledge of traditional medicinal plants. 56 medicinal plants from 55 genera and 37 plant families were documented. Asteraceae were the most cited plant families, and leaves were the most reported plant parts used. The decoction was the most common preparation method, with ingestion being the primary application form. The lowest use values of two plant species, L. camara, and H. indicum, are selected for the qualitative phytochemical analysis and antimicrobial assay. Results in the phytochemical analysis showed the presence and varying levels of phytochemicals. Results in the antibacterial assay showed that H. indicum showed minimal antibacterial activity and L. camara exhibited moderate antibacterial activity against Escherichia coli, Salmonella typhimurium, and Staphylococcus aureus.Thesis