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- W2394083244 abstract "【Objective】This paper studied the relationship between HI antibody titers against infectious bronchitis virus strain and egg production rate.【Method】180SPF chickens were divided into 4groups.Chickens in the first and second groups were immunized with H120 live vaccine.4weeks later,the second group chickens were vaccinated with Newcastle disease,infectious bronchitis,and avian influenza virus(H9subtype)triple inactivated vaccine(La Sota+M41+HN6strain).Group 3and Group 4had no immunization.4weeks after vaccine was inoculated,the antibody in blood of tested chickens was determined when the egg production rate was stably over 80%.Then,the first three groups were challenged by virulent infectious bronchitis virus M41 strain,and chicken laying performance and egg quality were recorded in the following 4 weeks.Then the relationship between HI antibody titers against infectious bronchitis virusstrain and egg production performance was analyzed.【Result】Chicken egg laying performance was not affected by virulent infectious bronchitis virus when their HI antibody titers against virulent infectious virus were 2-8.2-2-9.3.The first group which was only immunized by live attenuated vaccine had the HI titers of2-4.8,and the egg production rate decreased by 12.69%.The HI tiers of control group were 2-2.0,and egg production rate decreased by 45.22%.【Conclusion】HI antibody titers and egg production performance were positively related.HI antibody detection can be used to evaluate the immune efficacy of inactivated vaccines with infectious bronchitis virus." @default.
- W2394083244 created "2016-06-24" @default.
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- W2394083244 date "2015-01-01" @default.
- W2394083244 modified "2023-09-28" @default.
- W2394083244 title "Relationship between HI antibody titers against infectious bronchitis virus and egg production rate" @default.
- W2394083244 hasPublicationYear "2015" @default.
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