Effects of different concentration of Zattariamultiflora essence on immunity system of broilers

Introduction: Zattariamultiflora (Z. multiflora) is a herb belonging to Labiatae family with known therapeutic effects, like anti-inflammatory and antimicrobial activity especially for gastrointestinal tract and respiratory systems and use of such herbs seems to be necessary in today’s medicine. The aim of present study was to evaluate the effects of Z. multiflora essence on immunity of broilers. Materials and Methods: Different concentrations of Z. multiflora were added to the food of broilers, then the antibody titer’s were measured for Sheep Blood Cells (SRBC) and Newcastle Disease virus (NDV) plus stimulation rate of T-lymphocytes by Delayed-Typed Hypersensitivity (DTH) assay Results: Assays revealed that addition of 200 & 400 ppm of Z. multiflora essence in the diet of broilers increased Ab levels against NDV, statistically (p