Resistance to one or more anti-TB drug which arises during the course of treatment usably as a result of non adherence to the recommended regimen or faculty prescribing. This is found in a patient who has received at least one month of anti-TB treatment and was referred to as secondary resistance in the past

Patients diagnosed with TB who start anti-TB treatment and acquire resistance to one or more of the drugs used during the treatment

Proxy Drug resistance among previously treated cases

Child previously diagnosed with confirmed drug susceptible TB disease who developed DR-TB disease (or resistance to additional drugs) during TB treatment