To deserve the name "national tuberculosis program", tuberculosis control activities, diagnosis and treatment at the core, had to be available on the entire territory of a country to any patient who might need it. As shown in this pciture from Somalia, peripheral units quite commonly lack electricity, but case finding through identification of the most important transmitters, sputum smear-positive patients can be done in any place with the simple microscope that can be used with sunlight as the source for bright-field microscopy.
