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題 名 | Viral Distribution and Depress of Body Weight of a Duck Picornavirus in Experimentally Infected Peking Ducklings and Serological Survey among Poultry Species in Taiwan=鴨小核醣核酸病毒於實驗性感染北京鴨之病毒分布與抑制增重及臺灣禽類血清學調查 |
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作 者 | 周崇熙; 丁彥文; 曾俊憲; 施雨華; 潘銘正; 蔡向榮; | 書刊名 | 臺灣獸醫學雜誌 |
卷 期 | 39:2 2013.06[民102.06] |
頁 次 | 頁73-80 |
分類號 | 437.73 |
關鍵詞 | 鴨病毒性肝炎; 鴨小核醣核酸病毒; 人工感染; 血清盛行率; Duck hepatitis; Duck picornavirus; Experimental infection; Seroprevalence; |
語 文 | 英文(English) |
中文摘要 | 鴨病毒性肝炎是造成雛鴨高致死率之疾病,主要由目前分類於小核醣核酸病毒科(Picornaviridae)下之Avihepatovirus病毒屬中之Duck hepatitis A virus serotype 1(DHAV-1)與serotype 2(DHAV-2)所引起。本報告所研究之鴨小核醣核酸病毒(DPV)Tw90A株為1990年於高雄分離之鴨病毒株,並不會引起鴨病毒性肝炎典型之高致死率與肝炎病變,目前暫時歸類於小核醣核酸病毒科中之Sapelovirus病毒屬。在感染試驗一中,無DPV抗體之三日齡雛鴨腹腔注射10^(6.25) TCID50 Tw90A株病毒並不會引起死亡或明顯臨床症狀,但是接種組之增重顯著低於對照組鴨隻(p<0.05)。在感染試驗二中,以巢式反轉錄聚合酶鏈鎖反應偵測DPV在人工感染Tw90A株之無DPV抗體一日齡至21日齡之北京鴨後之體內分布與持續情形,結果顯示病毒可於感染鴨體內持續存在至少21天,大部分器官於接種後8至48小時會呈現陽性,而接種後21天則只侷限在腦、氣管、心肌、肝、脾、腎和腸道。此外,檢測DPV於台灣禽類之血清盛行率,結果顯示鴨隻為33.0%,鵝為7.1%,雞為1.5%,DPV於鴨隻抗體陽性率顯著高於其他禽類(p<0.01);同時鴿子DPV抗體陽性率高達22.5%,其重要性值得進一步探討。此外,比較鴨隻DHAV-1(62.3%)及DHAV-2(1.1%)陽性率,顯示台灣地區鴨肝炎病毒仍以DHAV-1為主要盛行之血清型。 |
英文摘要 | Duck hepatitis (DH) mainly caused by Duck hepatitis A virus serotype 1 (DHAV-1) and serotype 2 (DHAV-2) belonging to Avihepatovirus of Picornaviridae is a high mortality disease in ducklings. An untypical DH-pathogen, duck picornavirus (DPV) strain Tw90A, isolated in 1990 in Taiwan belongs to Sapelovirus of Picornaviridae was studied herein. In the experiment 1, none mortality or any obvious clinical symptoms were observed in the ducklings receiving 10^(6.25) TCID50 strain Tw90A intraperitoneally, but the body weight gain within the infection group was significantly lower than the control group (p<0.05). In the experiment 2, by using the RT-PCR and the Nested-RT-PCR, the viral genome was detected constantly in cerebrum, cerebellum, trachea, cardiac muscle, liver, spleen, kidney, and rectum in the inoculated ducklings from 8-hour to 21-day post-inoculation. In addition, the DPV-antibody field seroprevalence study demonstrated a 33.0% positive rate in duck which was significantly higher (p<0.01) than those of goose (7.1%) and chicken (1.5%). Meanwhile, the unexpected high DPV-sero-positive rate of pigeon (22.5%) needed a further study clarifying a possible DPV transmission role. Comparing to sero-positive rates of DHAV-1 (62.3%) and DHAV-2 (1.1%), it is suggested that DHAV-1 is the dominant DH etiology in duck population in Taiwan. |
本系統中英文摘要資訊取自各篇刊載內容。