Antibacterial effects of 18 medicinal plants used by the Khyang tribe in Bangladesh by Hossan, Md Shahadat, Jindal, Hassan Mahmood, Maisha, Sarah, Samudi, Chandramathi, Sekaran, Shamala Devi, Nissapatorn, Veeranoot, Kaharudin, Fatima, Su Yi, Lim, Khoo, Teng Jin, Rahmatullah, Mohammed, Wiart, Christophe