Abstract: Objective  To analyze the detection result of patients living with active TB in the  2010 TB epidemiological random survey in the Gansu.   Methods  The proportional stratified cluster random sampling method was employed in the fifth national TB epidemiological survey. A total of 42 613 people in 30 counties were examined.   Results  A total of 42 613 people in 30 counties were examined in this survey accounting for 96.6%（42 613/44 119）of the eligible population. The overall detection rate of active tuberculosis was 298.0/1 000 000(127/42 613). The detection rate increased slowly by age for people more than 45 years old, peaked in more than 75 years old group which was 1294.5/100 000 (12/927). The overall bacterial positive TB detection rate was 72.7/100 000（31/42 613）. Bacterial positive patient was not found in 20—, 25—, 30— age groups. Female bacteria positive detection rate reached a peak in 65— age group(419.6/100 000),male peaked in 80— age old (512.8/100 000). In rural and urban areas, TB detection rate was 339.4/100 000 (81/23 864) and 245.8/100 000 (46/18 714) respectively, the difference was statistically significant (χ ²=3.091, P=0.047) between the rural and urban areas.    Conclusion  The TB detection rate is high in Gansu, and the TB epidemic is still serious, and gradually spreading to the vulnerable elderly population. There is still a long way to go in the next 10 years.

Key words: Tuberculosis, pulmonary/epidemiology, Sampling studies