问题描述：
英语翻译
Serological response after vaccination was evaluated by Rose-Bengal Plate Test,Serum agglutination test and complement fixation tests.The antibody activity began to increase 15 days after vaccination and started to decrease gradually two months post vaccination.By 20 weeks after vaccination almost all ewes were serologically negative.Serological response was more intense after vaccination in infected herd but detected antibody level by all serological tests were negligible by 20 weeks of vaccination.Serological response lasted a little longer in lactating goats and billy goats than in sheep and rams,respectively.
Serological response after vaccination was evaluated by Rose-Bengal Plate Test,Serum agglutination test and complement fixation tests.The antibody activity began to increase 15 days after vaccination and started to decrease gradually two months post vaccination.By 20 weeks after vaccination almost all ewes were serologically negative.Serological response was more intense after vaccination in infected herd but detected antibody level by all serological tests were negligible by 20 weeks of vaccination.Serological response lasted a little longer in lactating goats and billy goats than in sheep and rams,respectively.
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