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Vaccination of sheep against M. paratuberculosis: immune parameters and protective efficacy

机译:羊副结核分枝杆菌的疫苗接种:免疫参数和保护功效

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摘要

Johne's disease in ruminants is caused by the pathogenic bacterium Mycobacterium avium subspecies paratuberculosis (Map). Currently available Map commercial vaccines protect against clinical disease but not infection. In this study, the proprietary Johne's vaccine Neoparasec and an aqueous formulation of Map 316F (AquaVax) were tested in sheep. Detailed immunological examination of blood and gut-associated lymphoid tissues was carried out on animals after vaccination and challenge with virulent Map to identify markers of protective immunity. Neoparasec vaccination provided significant protection against disease while AquaVax did not. Immune animals had stronger cell-mediated responses and altered proportions of CD4+, CD8+, CD25+ and B cells in blood, spleen and the gut lymphatics, than diseased animals.
机译:反刍动物中的约翰氏病是由致病性禽鸟分枝杆菌副结核病菌引起的(图)。当前可用的Map商业疫苗可预防临床疾病,但不能预防感染。在这项研究中,在绵羊中测试了专有的Johne疫苗Neoparasec和Map 316F(AquaVax)的水性制剂。接种疫苗并用毒力图谱攻击后,对动物进行了血液和与肠道相关的淋巴样组织的详细免疫学检查,以鉴定保护性免疫的标志物。 Neoparasec疫苗接种可有效预防疾病,而AquaVax则不能。免疫动物比患病动物具有更强的细胞介导反应,并且血液,脾脏和肠道淋巴管中的CD4 +,CD8 +,CD25 +和B细胞比例有所改变。

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