然后，依据PPD反应强度及活动性肺结核病人检出情况测算结核感染率及患病率。

Then, calculate tuberculosis infectious rate and morbidity according to PPD reaction intensity and finding of active tuberculosis patients.

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总体而言，因纽特儿童（比值比：4.22；95%可信区间：1.55-11.5）和那些与上一个哥或姐的年龄距离不足一年的儿童(比值比：2.48；95%可信区间：1.33-4.63) 相比结核杆菌的感染率较高。

Overall, the MTI rate was higher among Inuit children (OR: 4.22; 95% CI: 1.55–11.5) and among children born less than one year after the birth of the next older sibling (OR: 2.48; 95% CI: 1.33–4.63).

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突出的例外是非洲，在HIV感染率很高的国家中结核发病率自1990年以来已增加到三倍并以每3 - 4%的比率在整个非洲大陆仍然在继续上升。

The glaring exception is Africa, where TB incidence rates have tripled since 1990 in countries with high HIV prevalence and are still rising across the continent at a rate of 3-4% annually.

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