The experiment of laboratory immunizing potency, safety, immune period, preservative period, and challenge virus showed that its prevention rate of virulent virus was 100%, immune period was above 200 days, preservative period was above 450 days and immune effect was good.
In the protective efficacy experiment, groups of Langshan chickens were inoculated with the following vaccines: CVI988/Rispens and HVT . The results showed that when the challenge strain was GA, the protection index (PI) for single vaccination and revaccination were 68.7-87.5 and 87.5-93.7;
The efficacy of immune experiment showed that the strong immunity have produeed 10-day postino culation (the titers of HI was 8. 5log2) the peak of titers have reached after inoculation of the thirty days (11. 25log2) the titers of HIstill was 7. 51og2 until 150-day postinoculation.
78.7with Wolthull chickens respectively. Agar-gel precipitation test of feather folliclesshowed that chickens vaccinated with rFPV-gBIR+HVT were weaker shedders ofchallenged virus as compared with HVT.
A series of animal expriments in SPF chickens were carried out to meet the requirements for applying the certificate of the rFPV-gB/R based vaccine from the Chinese Ministry of Agriculture.
The oil-Adjuvant Inactivated Vaccine against EDS-76 was preparated with the isolative strain of virus. The efficacy of immune experiment showed that the strong immunity have produeed 10-day postino culation (the titers of HI was 8. 5log2) the peak of titers have reached after inoculation of the thirty days (11. 25log2) the titers of HIstill was 7. 51og2 until 150-day postinoculation. The tracking investigation on inoculative chicken (about 100 thousands) was made within 300 days postinoculation, the immune ...
The oil-adjuvant Inactivated vaccine against EDS-76 Was preparated with theisolative straiii of virus,The efficacly of immune experiment showed that the strong immuni-ty was produced at the loth day postinoculation (the titers of HI was 8.5log2),the peak oftiters(11.25log2)bas been reacbed at the day 30 after inocuiation,the titers of HI still was7.5 log2 until the day 150 Postitoculation. The tracking investigation on inoculative chicken(about 100 thousands)was made for 300 days postinoculation,the immune ...