A patient with cough was sputum AFB negative but chest X-ray was suggestive of TB. What should be the next step according to RNTCP?
Line probe assay
Culture
Nucleic acid amplification test
Tuberculin test
Answer- C. Nucleic acid amplification testCaridge Based Nucleic Acid Amplification Test (CB-NAAT): The CB'NAAT is known as the GeneXpeft in mostcountries other than India This is prefered first diagnostic test in children and people with TB and HIC co-infection