**Question:** A patient who had undergone renal allograft transplantation 6 months back on treatment with azathioprine and prednisolone presents to the hospital with a history of fever, night sweats, cough, and breathlessness. On X-ray, a cavity is seen in the right apical region along with classification. Auramine rhodamine staining of sputum shows tubercle bacilli and serum creatinine level is 1.2 mg%. The treatment given is?

A. Antibiotics
B. Steroids
C. Immunosuppressive drugs
D. Renal replacement therapy

**Correct Answer:** A. Antibiotics

**Core Concept:** In this scenario, we are dealing with a patient who has developed tuberculosis (TB) post renal allograft transplantation. The patient is already on immunosuppressive therapy (azathioprine and prednisolone) which weakens the immune system, making them more susceptible to TB infection.

**Why the Correct Answer is Right:** Given the clinical symptoms, X-ray findings, and sputum culture results, we can infer that the patient has developed tuberculosis (TB). The presence of a cavity on chest X-ray, positive TB staining of sputum, and elevated serum creatinine levels (1.2 mg%) indicate active TB.

**Why Each Wrong Option is Incorrect:**

B. Steroids (Option B) - Steroids are immunosuppressive drugs used in treating TB, not exacerbating it. However, in this case, the patient is already on azathioprine and prednisolone, which are immunosuppressive drugs. Hence, giving more steroids would be counterproductive.

C. Immunosuppressive drugs (Option C) - Immunosuppressive therapy is likely contributing to the patient's condition as mentioned earlier, but administering more immunosuppressive drugs (azathioprine and prednisolone) would be detrimental to the patient.

D. Renal replacement therapy (Option D) - This treatment is related to end-stage renal disease and kidney replacement therapy. It is unrelated to the management of TB infection.

**Clinical Pearl:** It is crucial to identify and treat TB promptly in immunosuppressed patients to prevent complications, such as disseminated TB, which can lead to death. The correct treatment involves a multi-drug regimen under the supervision of a physician experienced in managing TB in immunosuppressed patients. The patient should be started on anti-tubercular therapy (ATT), which includes isoniazid, rifampicin, pyrazinamide, and ethambutol. Close monitoring of renal function and blood pressure is essential during ATT therapy due to the nephrotoxic and hypertensive potential of the medications. The patient should also receive antitubercular treatment under the supervision of a physician experienced in managing TB in immunosuppressed patients.