Phytochemical screening and antibacterial activity of selected medicinal plants of Bayabas, Sablan, Benguet Province, Cordillera Administrative Region, Luzon, Philippines door Balangcod, Teodora D., Vallejo, Vilma L., Patacsil, Melba, Apostol, Orlando, Laruan, Lianne Marie Victoria A., Manuel, Jayjay, Cortez, Sonny, Gutierrez, Rosemary M.