Which of the following tests has the highest diagnostic value? A. Thin blood film B. Congo red stain C. Thick blood film D. Ziehl-Neelsen stain

Understand the Problem

The question is asking which diagnostic test would be most effective for a homeless man presenting with symptoms that may indicate a pulmonary infection or disease, based on provided clinical details.

More Information

Ziehl-Neelsen stain is used for detecting Mycobacterium tuberculosis in sputum samples, which is relevant given the symptoms and chest X-ray findings in the patient.

Tips

A common mistake is not considering the specific symptoms and tests related to tuberculosis. Ensure the diagnostic test matches the suspected infection.

Sources

• Ziehl–Neelsen staining for medical students - slideshare.net