 Therefore, a combination of the disc diffusion assay with at least one other assay is often preferred for screening.As the extract of the roots of "P. persica" demonstrated good activity in both the disc diffusion and MTT microdilution assays, it was selected for further chemical analyses.The Chungtia villagers consume the liquid from fresh roots of "P. persica" soaked in water to treat typhoid and the seed endosperm is eaten to treat dysentery and diarrhoea.