It has been reported that the shrubby perennial herb, Plumbago zeylanica (family Plumbaginaceae), possesses antimicrobial activities5. It grows in shady places of wastelands and graveyards all over Bangladesh. Roots and aerial parts principally contain an orange yellow pigment, plumbagin, a naphthoquinone and a fatty alcohol5. Its other constituents in roots are chitranone, zeylanone, dihydrost...