J INFECTION:纯化沙门氏菌伤寒蛋白抗原对急性伤寒血清学诊断的评估

2017-07-21 MedSci MedSci原创

关于伤寒的诊断,目前仍然是是一个挑战。近日,国际杂志 《Journal of Infection》上在线发表一项纯化沙门氏菌伤寒蛋白抗原对急性伤寒血清学诊断的评估研究。旨在通过测量孟加拉发热患者队列中伤寒沙门氏菌(S.Typhi)蛋白抗原和Vi多糖的抗体反应开发对伤寒诊断的新方法。

关于伤寒的诊断,目前仍然是是一个挑战。近日,国际杂志 《Journal of Infection》上在线发表一项纯化沙门氏菌伤寒蛋白抗原对急性伤寒血清学诊断的评估研究。旨在通过测量孟加拉发热患者队列中伤寒沙门氏菌(S.Typhi)蛋白抗原和Vi多糖的抗体反应开发对伤寒诊断的新方法。

研究对确诊的伤寒(n = 32),其他确诊的感染n = 17)和健康对照(n = 40)的患者血浆,通过ELISA测量了12种纯化抗原和Vi多糖产生的IgMELISA检测来自243名未诊断发热性疾病的患者的血浆中特异性抗原。

S.Typhi蛋白质抗原产生的IgM抗体彼此相关(rho>0.8),但Vi产生的IgM抗体的情况并非如此(rho <0.6)。伤寒患者对11/12蛋白抗原和Vi比健康对照和其他感染者表达更高的IgMViPilLCdtB显示出最大的敏感性和特异性。当Vi与一种蛋白质抗原结合时,特异性和灵敏度得到提高,分别产生0.80> 0.85的敏感性和特异性。对具有未诊断的发热性疾病的患者应用动态临界指示,34-58%的IgM反应表明是伤寒。

研究人员评估了几种S.Typhi作为诊断工具的潜力。研究表明该检测提供了良好的敏感性和特异性,但需要在不同的患者群体进一步评估。

原始出处:

Nga Tran Vu Thieu, Tan Trinh Van, Anh Tran Tuan,et al. An evaluation of purified Salmonella Typhi protein antigens for the serological diagnosis of acute typhoid fever

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