The invention discloses a preparation method of a chicken
infectious bronchitis virus HA
antigen. In the preparation method, an A-type
clostridium perfringen is adopted to treat a
virus solution, so that the problem that in the conventional method, the preparation cost of the
antigen is high is solved; an adopted stabilizing agent is N-2-hydroxypropyl trimethyl
ammonia chloride chitosan and is water-soluble, so that the problem that the conventional stabilizing agent
chitosan is water-insoluble is solved; an adopted deactivating method is deactivation for 30 minutes in water bath of 56 DEG C, so that the problem that the
titer is reduced after a deactivating agent is added is solved; an adopted chicken
red blood cell suspension has the concentration of 0.5 percent, so that the judgment result is more stable and the problem that the judgment result is not accurate is solved; due to adoption of
dialysis bag for concentration, the problem that the
titer of the
antigen is low is solved; therefore, the invention provides the preparation method of the chicken
infectious bronchitis virus HA antigen, which is low in cost, high in
titer, and high in stability and safety, and the prepared IBV (
infectious bronchitis virus) HA antigen can be successfully applied to detection on the titer of a serum HI
antibody after chickens are immunized by an IBV vaccine.