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水禽小病毒組織培養疫苗效力試驗結果

水禽小病毒組織培養疫苗效力試驗結果. 製劑研究組 曾俊憲. Introduction.

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水禽小病毒組織培養疫苗效力試驗結果

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  1. 水禽小病毒組織培養疫苗效力試驗結果 製劑研究組 曾俊憲

  2. Introduction • Waterfowl parvovirus infection refer to the infection of goslings and ducklings by goose parvovirus (GPV) or muscovy duck parvovirus (MDPV) that characterized by fibrinous necrotizing enteritis, weak knees, growth retardation and shorten bills, etc. in clinical signs. • In Taiwan, there were two severe outbreaks, the first time caused by GPV in 1982 and the second one caused by MDPV in 1989. Both outbreaks resulted in heavy losses of goslings and ducklings in the field.

  3. GPV posses high virulence for geese and muscovy ducks. The morbidity and mortality are always high. MDPV is non-virulent for geese, but the susceptibility for all kinds of ducks reaches 100%, and the mortality for ducks reaches 70%.

  4. ? ? ? ? ? ? ? ? ? ? ? ?

  5. 試驗動機 • 疫苗成本偏高。 • 對正番鴨之保護能力?

  6. 試驗項目 一、2種GDV疫苗之效力試驗比較。 二、GDV疫苗接種日齡與抗體反應關係。 三、GDV與MDPV之抗原相關性分析。 四、雙價疫苗之病毒力價與抗體反應關係。 五、雙價疫苗之免疫途徑與抗體反應關係。 六、安全試驗。 四、迴毒試驗。

  7. 二種GDV疫苗之效力試驗比較

  8. GDV疫苗接種日齡與抗體反應關係

  9. GDV與MDPV之抗原相關性分析。

  10. 雙價疫苗之病毒力價與抗體反應關係

  11. 雙價疫苗之免疫途徑與GDV抗體反應之關係

  12. 雙價疫苗之免疫途徑與MDPV抗體反應之關係

  13. 比較二種雙價疫苗之GDV抗體力價

  14. 比較二種雙價疫苗之MDPV抗體力價

  15. 安全試驗 以107.0 TCID50/dose肌肉注射接種無抗體的1日齡正番鴨,連續觀察21天,結果接種組與對照組鴨隻皆無死亡及下痢、發育不良等臨床症狀。

  16. 迴毒試驗 以口服方式接種無水禽小病毒抗體的1日齡正番鴨,3天後採集腸管,研磨成10倍乳劑後再口服接種到1日齡正番鴨,連續迴毒10代後,採集腸管,以PCR偵測GDV及MDPV ,結果均可偵測到GDV及MDPV 之特異性核酸片段,而且未造成小鴨死亡或發育不良。

  17. 結 論 • 依據水禽小病毒感染症活毒疫苗檢驗標準規定,免疫後4周鴨隻血清中和抗體力價須32 ×以上。本雙價疫苗以105 TCID50/dose及104 TCID50/dose肌肉接種後8日內其中和抗體力價皆可達269 ×以上。 • 發展正番鴨專用之雙價水禽小病毒活毒疫苗。

  18. 討論 來時糊塗去時迷,空在人間走一回,未曾生我誰是我,生我之後我是誰,長大成人方是我,合眼矇矓又是誰,不如不來亦不去,來時歡喜去時悲,悲歡離合多勞慮,何日清閑誰得知,為人切莫用心機,百年世事三更夢,萬里乾坤一局棋,禹疏九河湯放桀,秦吞六國漢登基,古來多少英雄漢,南北山頭臥土泥。

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