Cali Sin Tos Aim 2

Inclusion Criteria: For index persons with TB: * assigned by the SoPH to receive contact investigation services from the study community health worker * may be of any age (represented by a parent or legal guardian for those age\<18) For contacts of index persons with TB: * include the index person's named household contacts, defined as those spending one or more days or nights within the past 3 months sleeping under the same roof as the index person; * may be of any age (represented by a parent or legal guardian for those age\<18). Exclusion Criteria: For index persons with TB: * who are living outside the city of Cali; * who lack capacity to agree to testing. For contacts of index persons with TB: * who have already been diagnosed with and treated for active TB within the past two years; * who lack capacity to agree to testing.