Fig. 4.

Identification of presumptive TB at general health services. The group accessing care at general health services (green box) may include people with TB symptoms seeking care for a health problem other than TB (refer to Fig. 3, green boxes). Identification of presumptive TB in these patients would be missed if a health worker assesses a patient and does not specifically ask about TB symptoms (green dashed line). TB screening systematically offered to all people accessing care, irrespective of their presenting complaint (green solid line), may identify people with presumptive TB who do not seek care for TB symptoms specifically. People with presumptive TB may access TB diagnostic services, while people who screen negative may follow routine assessment by a health worker