Surveys are frequently used in TB epidemiology •Sampling universe is the population: –Prevalence surveys –Tuberculin skin test surveys •Sampling universe is "all TB patients" –Proportion of diagnosed new TB patients with HIV test •Sampling universe is the number of culture positive TB patients –Drug resistance surveys برای دانلود کل پاپورپوینت از لینک زیر استفاده کنید: ...