| diagnosis of active tuberculosis in china using an in-house gamma interferon enzyme-linked immunospot assay. | gamma interferon (ifn-gamma) release assays have been proven to be useful in the diagnosis of mycobacterium tuberculosis infection. nevertheless, their specificity and sensitivity vary among the different populations studied. here, we evaluate the value of an in-house ifn-gamma enzyme-linked immunospot (elispot) assay in the diagnosis of active tuberculosis (tb) in shenzhen, china, where the prevalence of tuberculosis is severe and mycobacterium bovis bcg vaccination is mandatory at birth. a tot ... | 2009 | 19339489 |