Tuberculosis

A 14-year-old boy, previously well, presented with a history of 12 days of fever with no localizing symptoms. He had been immunized according to the national immunization schedule till 10 years of age. He was initially treated for “typhoid fever” with oral cefixime for 7 days with no response. There was a history of weight loss, with no history of contact with tuberculosis. On examination, he was febrile, pale, and thin with a weight of 40 kg and a BMI of