10.22376/ijpbs.2019.10.1.p1-12 Volume 5 Issue 1 2014 (January - March) Medicinal plants have an important role in our normal life. The plant immunostimulant activity was screened using animal modal. The efficiency of immunostimulant was analysed antibody titration, B and T cell counts and differential count method. From the results the antibody levels were significantly raised compared to pathogen treated animal. The T cell counts were increased due to the cellular level stimulation of plant extract in host. In the present investigation concluded that the plant extracts of lessThan i greaterThan L. nobilis lessThan /i greaterThan have immunostimulant potential. SUGANTHI. R AND R. ARUNKUMAR Medicinal plant, immunomodulation and L.nobilis. 978-982