At a wider public health policy level, these results do not support replacement of the Mantoux test with a T cell based test for the diagnosis of TB infection, at least in settings such as The Gambia.
This will enable this new T cell based test to contribute usefully to the diagnosis of LTBI in HIV infected persons and would usefully contribute to TB control by improving the direction of preventive therapy among HIV positive patients.
A possible approach would be to treat all those who are Mantoux positive, then perform a T cell based test on those who are Mantoux negative, treating those with a positive result.
Interferon gamma release assay (IGRA), commercially available since 2005, is an in vitro T-cell based test which quantifies the immune response of T-cells to in vitro exposure to antigens of M. tuberculosis, other than those used in BCG vaccination [ 6].
The aim of this study was to conduct assessments of the diagnostic accuracy of the T-cell based test (T SPOT TB) for TB in children who had previously been BCG vaccinated and compare these with the results of the TST.
Relying entirely upon cell proliferation based tests, TPA might be classified as a safe chemical without recognition of its potential to induce DNA damage.
Dr. Schoffner recommended a muscle biopsy, genetic testing, metabolic testing, and cell culture based testing.
T24 human bladder cancer cell line based test was performed to evaluate the chemopreventive/antiproliferative potential of EGCG and results showed that EGCG inhibits phosphatidylinositol 3′-kinase/Akt activation that in turn shows role in the modulation of Bcl-2 family proteins, leading to enhanced apoptosis of T24 cells [ 49].
Thus, this method can be readily adopted for wide spread uses including study how cell interact with their local- and micro-environments, cell migrations in 3-D, tumor and cancer cells interactions with the normal cells, cell process and axon extension, cell based drug test assays and other diverse applications.
Moreover our data indicate that the WBA is a robust, relatively simple and user friendly format for a T cell based diagnostic test.
In children <3 years of age, a diagnosis of probable or possible TB was also made when clinical signs and symptoms of TB were present together with radiographic findings but without a positive TST or QFT-GIT, because in this age group these T-cell based tests have low sensitivity for TB disease [ 26].
