Abstract: ObjectiveTo find out tuberculin reactivity of the students from the local junior middle school. Methods5153 students of Grade 1 from 4 middle schools of Huailai were taken the standardized PPD and invested on the age, sex, residence and tuberculosis epidemiological characteristics of these students. Results80.2% students were at the age group 13～14, 57.6% students living in rural areas, total positive rate (≥5mm and ≥15mm) were 23.1% and 7.4% respectively. The positive rate of PPD test (≥5mm、≥10mm、 ≥15mm and≥20mm) in 2219 students without BCG scare were 16.5%、10.9%、5.9% and 2.9% respectively. The positive rate in students with BCG scar was higher than that of students without, and that in students with TB contact history and TB history was higher than that of student without. ConclusionsThe junior high school students should be the target of local tuberculin tests and tuberculin positive reaction≥15mm can be classified as preventive therapy target to prevent TB emergence.

Key words: Tuberculosis,pulmonary/prevention & control, Tuberculin test, Students