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題 名 | Lack of Concomitant Immunity in Amicrofilaremic Jirds Chronically Infected with Brugia pahangi=Brugia pahangi 慢性感染無血中幼絲蟲之沙鼠不具共同性免疫(Concomitant immunity) |
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作 者 | 林大盛; | 書刊名 | 國立臺灣大學農學院研究報告 |
卷 期 | 34:3 1994.09[民83.09] |
頁 次 | 頁209-217 |
分類號 | 437.245 |
關鍵詞 | 共同性免疫; 隱發性感染; 血絲蟲症; 嗜伊紅性球; 動物模式; Concomitant immunity; Occult infection; Filariasis; Eosinophil; Animal model; |
語 文 | 英文(English) |
中文摘要 | 本文驗利用Brugia pahangi沙鼠模式探討"endemic normals"是否具有共同 性免疫(concomitant immunity)之特性。共有五組,每組15隻沙鼠:第一組為正常對 照組;第二組為無血中幼絲蟲且無循環抗原;第三組為無血中幼絲蟲但有循環抗原; 第四組為有大量血中幼絲蟲;第五組為有少量血中幼絲蟲。各組沙鼠皆皮下注射 75隻B.pahangi第三期仔蟲。血中嗜伊紅性球數目在注射仔蟲之前,以及之後每隔 3至4天測量之。結果發現正常對照組及無血中幼絲蟲沙鼠在注射仔蟲後,血中嗜 伊紅性球數目有顯著上升;然而有血中幼絲蟲者,其嗜伊紅性球數目劫沒上升現 象。注射仔蟲後25天屍解,發現仍存活之仔蟲數目及位置在各組間並無不同。有 血中幼絲蟲之沙鼠除了比其他組帶有較多之成蟲外,同時一般說來也有較嚴重之 病變;如有較多及較大之淋巴管內血絲蟲栓,及擴張之淋巴管。這些證據說明沙 鼠感染有低度慢性隱發性之B. pahangi對再次感染並無抵抗力:同時也支持須長期 多次感染第三期仔蟲才可能造成血絲蟲之"concomitant immunity"現象之學說。 |
英文摘要 | Whether "endemic normals" possessing a status of concomitantimmunity was examined in this study using a Brugia pahangi -jirdmodel. Five groups, 15 jirds per group, were used: group I, normalcontrol; group 2, amicrofilaremic antigenemia negative; group 3,amicrofilaremic antigenemia positive; group 4, high microfilaremia;and group 5, low microfilaremia. They were inoculated subcutaneouslywith 75 B. pahangi third-stage larvae. Circulating eosinophil numberswere monitored before and every 3 to 4 days after challenge. It wasfound that normal controls or amicrofilaremic jirds, in contrast tomicrofilaremic jirds, had increased eosinophilia levels after challenge.At necropsy, 25 days later, there were no significant differences inthe numbers and locations locations of recovered larvae among allgroups of the jirds. Microfilaremic jirds harbored significantly moreadult worms, and in general, had greater lesion severity than othergroups as judged by the numbers and sizes of lymphatic thrombi andthe degree of lymphatic vessel dilation. These data indicate that thedevelopment of low level chronic occult B. pahangi infection in jirdsis not accompanied by acquired resistance to reinfection and supportsthe hypothesis that long term multiple inoculations of third-stagelarvae may be necessary to induce the phenomena of concomitantimmunity in filariae. |
本系統中英文摘要資訊取自各篇刊載內容。