A 23-year-old female presents with fever, night sweats, weight loss, and abdominal distension for 3 months. Shifting dullness is noted on abdominal examination, suggesting exudative tuberculosis. The first-line diagnostic test is:
A 23-year-old female presents with fever, night sweats, weight loss, and abdominal distension for 3 months. Shifting dullness is noted on abdominal examination, suggesting exudative tuberculosis. The first-line diagnostic test is: