Progressive disseminated infection with Mycobacterium avium complex after intravenous and oral challenge in cyclosporine-treated rats.

Progressive disseminated infection with Mycobacterium avium complex after intravenous and oral challenge in cyclosporine-treated rats.
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环孢素治疗的大鼠静脉内和口服攻击后鸟分枝杆菌复合体进行性播散性感染。

DOI:
10.1093/infdis/164.5.922
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发表时间:
1991
期刊:
The Journal of infectious diseases
影响因子:
--
通讯作者:
Armstrong,D
Armstrong,D
中科院分区:
--
文献类型:
--
作者:
Brown,ST;Edwards,FF;Bernard,EM;Niki,Y;Armstrong,D

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用环孢菌素 (CsA) 进行免疫抑制的雄性 Sprague-Dawley 大鼠在静脉内或口服鸟分枝杆菌复合体 (MAC) 攻击后发生播散性感染。静脉接种少至 5 × 103 个微生物后即可形成导致菌血症的播散性感染。当不给予 CsA 或感染后 1 个月停止 CsA 时,动物清除了血液和组织中的杆菌。动物在受到多达 106 种微生物的口腔攻击后出现了播散性感染。当脾脏中的微生物超过107时,就会出现持续性菌血症。观察到菌株间毒力的差异。受感染的组织表现出与艾滋病患者相似的组织病理学变化。 CsA 处理的大鼠是一种新模型,对于研究 MAC 菌株的毒力和播散性 MAC 感染的发病机制似乎很有用。
Male Sprague-Dawley rats, immunosuppressed with cyclosporine (CsA), developed disseminated infection after intravenous or oral challenge withMycobacterium aviumcomplex (MAC). Disseminated infection leading to bacillemia could be established after intravenous inoculation with as few as 5 × 103organisms. When CsA was not given or when CsA was stopped 1 month after infection, animals cleared the bacilli from blood and tissue. Animals developed disseminated infection after oral challenge with as few as 106organisms. Persistent bacillemia occurred when organisms in the spleen exceeded 107. Differences in virulence among strains were observed. Infected tissues showed histopathologic changes similar to those seen in patients with AIDS. The CsA-treated rat is a new model that appears useful for studies of the virulence of MAC strains and the pathogenesis of disseminated MAC infection.
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