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Table 2 The screening procedure through algorithm WHO 1a/1c, 2, and 3

From: Comparison of yield and relative costs of different screening algorithms for tuberculosis in active case-finding: a cross-section study

Algorithm Household primary screening Chest X-ray Smear Culture
  1) 2) 3)    
WHO 1a    
WHO 1c   
2  
3
  1. (1) cough lasting longer than two weeks; (2) hemoptysis or bloody sputum; (3) cough longer than one week yet less than two weeks, and accompanied with any of the following symptoms: fever, night sweats, chest pain, loss of appetite, fatigue, or weight loss(> 3 kg)