3 results about "Infectious bronchitis virus" patented technology

The invention provides a preparation method of poultry specific transfer factors, relating to the field of medicines, in particular to a preparation method of a poultry specific transfer factor. The preparation method comprises the steps of: with pig spleen or peripheral blood as a raw material, preparing a lymphocyte monolayer, culturing lymphocyte in vitro, then inducing and culturing by using polyinosinic polycytidylic acid and infectious bronchitis virus, and producing a large quantity of infectious bronchitis virus resistant specific transfer factors in vitro. The infectious bronchitis virus resistant specific transfer factors prepared in vitro by using the method are used for treating the infectious bronchitis and improving poultry immunity.

The invention discloses a feed additive enteric-coated sustained-release pellet with a function of preventing and treating poultry respiratory syndromes and a preparation method for the feed additive enteric-coated sustained-release pellet. The enteric-coated sustained-release pellet is prepared from the following raw materials: water-soluble vitamin A, water-soluble vitamin D, water-soluble vitamin E, thymol, cinnamyl aldehyde, menthol, eucalyptus oil, maltodextrin, sodium carboxymethylcellulose, lactose and a coating solution which is a Eudragit enteric-coated coating solution with a model of Eudragit L30D-55, wherein the coating solution is water suspension with mass concentration of 5%-8%. The feed additive enteric-coated sustained-release pellet with the function of preventing and treating poultry respiratory syndromes disclosed by the invention has a treatment effect on sick chicken with respiratory syndromes due to artificial infection of chicken infectious bronchitis virus (M41 strain), can effectively improve the respiratory tract function, is small in dosage, quick in effect-taking, and has the effects of promoting growth and increasing a feed conversion rate.