Comparison of the Challenge Effect of Mycoplasma Synoviae after Immunization with Three Inactivated Vaccines
In order to evaluate the immune effect of Mycoplasma spp.inactivated vaccine,three commercial vaccines were selected for immunization test of SPF chickens at 28 days of age.Antibodies were detected at 30 dpi and MS challenge was performed.Clinical changes were observed within 14 dpc.Mycoplasma synoviae positive rate was detected by throat swabs and cloaca swabs at 14 dpc.The results showed that the Mycoplasma gallisepticum antibody of mean value and positive rate in group C were(4 779 and 100%)which were slightly higher than groups A and B.The mean value(1 613)and positive rate(80%)of MS antibodies were also higher in group C,while both groups A and B were negative.The effectively protection of MS challenge and significantly reduction viral excretionwill identified after using inactivated Mycoplasma spp.vaccine.
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