Stanford University School of Medicine, Division of Infectious Diseases and Geographic Medicine, Stanford, CA, USA.
Epidemiol Infect. 2013 Jun;141(6):1232-43. doi: 10.1017/S0950268812001823. Epub 2012 Sep 7.
We screened 176 healthy, adult (aged 18-55 years) US refugees from tuberculosis (TB)-endemic countries to evaluate whether cytokine responses to latent TB infection (LTBI) are modified in the setting of concurrent H. pylori and helminth infection. As measured by the Quantiferon-TB GOLD interferon-γ release assay, a total 38 (22%) subjects had LTBI, of which 28 (74%) also were H. pylori seropositive and/or helminth infected. Relative to ten subjects with LTBI only, 16 subjects with concurrent H. pylori infection had significantly elevated levels of IFN-γ, and nine subjects with both H. pylori and helminth infection had significantly elevated levels of IFN-γ, IL-2, IL-13, and IL-5. H. pylori is associated with enhanced IFN-γ responses to TB, even in the setting of concurrent helminth infection. Efficacy of TB vaccines may vary with the co-existence of these three infections in the developing world.
我们筛查了 176 名来自结核病(TB)流行国家的健康成年(18-55 岁)美国难民,以评估在同时存在 H. pylori 和寄生虫感染的情况下,针对潜伏性结核感染(LTBI)的细胞因子反应是否会发生变化。通过 Quantiferon-TB GOLD 干扰素-γ释放检测,共有 38 名(22%)受试者存在 LTBI,其中 28 名(74%)受试者同时 H. pylori 血清阳性和/或寄生虫感染。与仅存在 LTBI 的 10 名受试者相比,16 名同时存在 H. pylori 感染的受试者的 IFN-γ 水平显著升高,9 名同时存在 H. pylori 和寄生虫感染的受试者的 IFN-γ、IL-2、IL-13 和 IL-5 水平也显著升高。即使在同时存在寄生虫感染的情况下,H. pylori 也与对 TB 的增强 IFN-γ 反应有关。在发展中国家,TB 疫苗的疗效可能会因这三种感染同时存在而有所不同。
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