Learning Objectives

Screening and Diagnostic technologies are tests that objectively identify cases under various definitions.

They are used at specific time points for one or more indications, such as identification and diagnosis of TB infection, presumptive TB, TB disease, routine followup and diagnosis of drug resistance, as per the various diagnostic algorithms.

They are classified based on the technology as Microscopy, Phenotypic, genotypic, Radiological and Histopathological tests. Other tests may be used for identifying TB infection such as Mantoux and IGRA.

There are a few serological tests developed for the use of diagnosis of TB, but are banned due to their unreliability.