AFB STAIN, SPUTUM

What this test checks

Examines sputum under microscope with special staining to detect TB bacteria.

Why do people get this test?

Standard test when TB is suspected from cough lasting more than 2 weeks.

When you should consider this test

• Cough lasting 2+ weeks
• Weight loss with cough
• Family contact with TB

How to prepare

Early morning sputum, deep cough — 3 samples on different days often needed.