What method is used to confirm a TB case?

What method is used to confirm a TB case?

• A. Sputum smear
• B. Chest X-ray
• C. Blood culture
• D. CT scan

Answer: (B)

Confirmation of TB relies on detecting the bacteria in a patient’s specimen, not just on imaging. A chest X-ray can show findings that raise suspicion for TB and help assess disease, but it cannot prove infection because many other conditions can produce similar shadows. To confirm TB, you need microbiological evidence from the sputum or other samples—most commonly by sputum smear microscopy to find acid-fast bacilli, and by culture to grow the organism (with culture considered the gold standard for accuracy). Rapid molecular tests (NAAT) on sputum or other specimens can also provide confirmation quickly. So, the definitive confirmation comes from microbiological testing, rather than imaging alone.

Confirmation of TB relies on detecting the bacteria in a patient’s specimen, not just on imaging. A chest X-ray can show findings that raise suspicion for TB and help assess disease, but it cannot prove infection because many other conditions can produce similar shadows. To confirm TB, you need microbiological evidence from the sputum or other samples—most commonly by sputum smear microscopy to find acid-fast bacilli, and by culture to grow the organism (with culture considered the gold standard for accuracy). Rapid molecular tests (NAAT) on sputum or other specimens can also provide confirmation quickly. So, the definitive confirmation comes from microbiological testing, rather than imaging alone.