Influences Of Polyactin A On Activities Of Immune Function And Growth In Chicken

Polyactin A (PAA )is a new immunopotentiator which has extensiveactivities .It is a kind of polysaccharides for having immunity activity and anti –tumorfunctions ,main chemistry composition is α -mannan-peptide belonging to aglucoprotein .In recent years ,There were many researches on the functions of PAAfor treatment and prevention animal's diseases ,its showed that the PAA couldenhance the ability to resistance diseases and improve the nourishment absorption inanimals . We researched the effects of Polyactin A on the B cell ,T cell and phagocytosisactivity of macrophage in chickens after being treated with vaccine and resistancedisease and accelerating growth in meat chicken .The results indicated that : 1.The specific antibody level (HI titres ) of chicken's peripheral blood treated byPAA were higher than not be treated groups .Its were significant (p﹤0.01) on the 10thand the 21th days after being treated with ND vaccine . 2.The activate index of T lymphoid cell were higher in the groups treated withPAA in different measurement time. Its were significant on the 21th day (p﹤0.05)andthe 27th day (p﹤0.01)after being treated ND vaccine . 3.The phagocytic proportion and phagocytic index of macrophage in asties wereincreased higher in chicken by being treated PAA. 4. Its were significant in the rate of disease incidence (p﹤0.01)and rate of death(p﹤0.05)were decreased and promoted the heavy in the chickens being treated withPAA . 5.Tt's showing that the PAA can increase the specific and unspecific immunityfunctions and can activate the humoral and cell-mediated immunity and eliminateentergerms and acceleration growth in chicken.