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頁籤選單縮合
題 名 | Characterization of Porcine Circovirus Type 2 in Taiwan=臺灣豬第二型環狀病毒之特徵 |
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作 者 | 王羣; 黃天祥; 黃金城; 涂堅; 鍾明華; 林士鈺; 賴秀穗; | 書刊名 | 行政院農業委員會家畜衛生試驗所研究報告 |
卷 期 | 39 民92 |
頁 次 | 頁67-74 |
分類號 | 437.657 |
關鍵詞 | 演化分析; 聚合酶鏈反應; 豬第二型環狀病毒; 陽性血清; Phylogenetic analysis; Polymerase chain reaction; Porcine circovirus type 2; Seropositive; |
語 文 | 英文(English) |
中文摘要 | 為了解臺灣地區豬第二型環狀病毒基因體變異及流行率,我們進行豬第二型環狀病毒基因體全長定序及收集2000年至2002年之間豬隻血清進行檢測。總計收集623個出現各種臨床症狀之檢體並已聚合酶鏈反應進行檢測,結果有309個檢體呈現陽性反應(49.6%)。比較臺灣所分離的8株豬第二型環狀病毒分離株基因體,可發現有95%至99%核酸序列相似性。將臺灣與世界各國40株豬第二型環狀病毒進行演化樹分析,可發現所有豬第二型環狀病毒被歸類為一大族群,其中包括2較小之亞群,臺灣分離株被分為主要2個亞群。由全國各養豬場收集不同豬齡的豬隻血清進行檢測,PCV2陽性率為83.5%。其中肉豬具有高抗體力價,而9週齡之仔豬抗體力價最低。豬第二型環狀病毒感染在臺灣養豬豬場已十分普遍。 |
英文摘要 | In an effort to understand the genetic diversity of porcine circovirus type 2 (PCV2) and the prevalence of PCV2 infection in Taiwanese herds, we have sequenced the complete genomes from PCV2-infected specimens and individually measured the antibody titer against PCV2 from pigs reared in Taiwan between the years 2000 and 2002. A total of 623 specimens originating from pigs displaying varied clinical signs were screened with the polymerase chain reaction (PCR). Results showed that 309 pigs (49.6%) tested positive for PCV2. Eight of the positive specimens were used for the amplification of the complete viral genome. Sequence comparison of the complete genomes indicated that the 8 Taiwanese PCV2 isolates shared 95-99% similarity. Phylogenetic analysis of all 40 PCV2 isolates from North America, Europe, Asia and Taiwan revealed that those isolates were grouped together in one large group containing two minor subgroups. The Taiwanese PCV2 isolates were classified into the two minor subgroups. The prevalence of serum antibodies to PCV2 in pigs was investigated, and results showed that approximately 83.5% of the pigs in Taiwan were seropositive. Finishing pigs possess the highest titers of antibodies, while 9-week-old pigs contained the lowest titers for specific antibodies. Our results suggest that PCV2 infections have become common in Taiwanese pig farms. |
本系統中英文摘要資訊取自各篇刊載內容。