A cross sectional survey on the prevalence of active pulmonary tuberculosis in three ‘key’ elderly population

Objective To conduct a survey on the prevalence of active pulmonary tuberculosis among 65 year olds or above.Study subjects would include those with characteristics of TB suspicious symptoms,diabetes and close contacts.Methods Purpose-sampling method was applied to choose 3 counties in Shandong province as the study sites,relying on the local basic public health service,for those elderly under 65 years old or above.The